300 ma very low quiescent current linear regulator IC with automatic green mode

Transcription

1 Datasheet 3 ma very low quiescent current linear regulator IC with automatic green mode Features Input voltage from 1.4 to 5.5 V Ultra low dropout voltage (3 mv typ. at 3 ma load) Automatic green mode Very low quiescent current (1 µa in green mode, 45 µa in normal mode and.1 µa typ. in off mode) Output voltage tolerance: ±1.% at 25 C 3 ma guaranteed output current Wide range of output voltages available on request: adjustable from.8 V, fixed up to 4. V in 1 mv step Logic-controlled electronic shutdown Internal soft-start Compatible with ceramic capacitor C OUT = 33 nf Internal current foldback and thermal protections Available in DFN6 1.2x1.3 mm and Flip-chip 4 bumps.69 x.69 mm..4 pitch Operating temperature range: -4 C to 125 C Applications Maturity status link LD3913S Mobile phones Digital still cameras (DSC) Cordless phones and similar battery-powered systems Portable media players Description The LD3913S is a high accuracy voltage regulator that provides 3 ma maximum current from an input voltage ranging from 1.4 V to 5.5 V, with a typical dropout voltage of 3 mv. It is available in DFN6 1.2 x 1.3 mm package and in ultra-small CSP 4 bumps package, allowing the maximum space saving. The device is stabilized with a ceramic capacitor on the output. The ultra-low drop voltage, low quiescent current and low noise features make it suitable for low power battery-operated applications. It integrates an internal logic circuitry, which allows the regulator to be in ultra-low consumption mode (green mode), when the output current required is very low. The normal working mode, with fast transient response, is restored when the load current increases. The enable logic control function puts the LD3913S in shutdown mode allowing a total current consumption lower than.1 µa. The current foldback and thermal protection are provided. DS Rev 3 - April 218 For further information contact your local STMicroelectronics sales office.

2 Block diagrams 1 Block diagrams Figure 2. Block diagram (adjustable version) V IN V IN Thermal protection Bandgap Fast turn-on & RC filter OPAMP Short circuit protection Control logic I OUT detection & Gree n Mode function GND EN GM ADJ Figure 3. Block diagram (fixed version) V IN V IN Thermal protection Bandgap Fast turn-on & RC filter OPAMP Short circuit protection Control logic I OUT detection & Gree n Mode function EN GND GM DS Rev 3 page 2/27

3 Pin configuration 2 Pin configuration Figure 4. Pin connection (top view) 1 6 A2 B A1 B1 DFN6 Flip chip 4 Table 1. Pin description DFN6 Pin n Flip chip Symbol Function 1 GM Auto green mode selection: low = active, high = disabled. This pin is internally pulled-down to GND. 2 B2 GND Common ground 3 B1 EN Enable pin logic input: low = shutdown, high = active. This pin is internally pulled-down to GND. 4 A1 IN Input voltage 5 ADJ/NC (1) Adjust pin 6 A2 OUT Output voltage 1. Not connected in the fixed output voltage version. DS Rev 3 page 3/27

4 Typical applications 3 Typical applications Figure 5. Typical application circuits Adjustable version Fixed version V I V I V O V O V I V I V O V O OFF ON EN LD3913S R 1 OFF ON EN LD3913S C In GM GND ADJ C Out C In GM GND C Out R 2 V O =V ADJ (1+R1/R2) Note: GM and ADJ pins are available on the DFN6 package only. DS Rev 3 page 4/27

5 Maximum ratings 4 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit V IN DC input voltage -.3 to 7 V DC output voltage -.3 to V I +.3 V V EN Enable input voltage -.3 to V I +.3 V V GM Auto green mode input voltage -.3 to V I +.3 V V ADJ Adjust pin voltage -.3 to 2 V I OUT Output current Internally limited ma P D Power dissipation Internally limited mw T STG Storage temperature range -65 to 15 C T OP Operating junction temperature range -4 to 125 C Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. All values are referred to GND. Table 3. Thermal data Symbol Parameter Value DFN6 Flip chip 4 Unit R thja Thermal resistance junction-ambient C/W R thjc Thermal resistance junction-case 14 C/W Table 4. ESD performance Symbol Parameter Test conditions Value Unit HBM 2 kv ESD ESD protection voltage CDM(DFN version) 2 V CDM(CSP version) 3 V DS Rev 3 page 5/27

6 Electrical characteristics 5 Electrical characteristics T J = 25 C, V IN = (NOM) + 1 V, C IN = C OUT = 1 µf, I OUT = 1 ma, V EN = V IN, unless otherwise specified. Table 5. LD3913S/LD3913SJ electrical characteristics (fixed versions) Symbol Parameter Test conditions Min. Typ. Max. Unit V IN Operating input voltage V > 2 V, I OUT = 1 ma, T J = 25 C % accuracy (normal mode) > 2 V, I OUT = 1 ma, -4 C < T J < 125 C -2 2 % 2 V, I OUT = 1 ma, T J = 25 C -2 2 mv 2 V, I OUT = 1 ma, -4 C < T J < 125 C -3 3 mv > 2 V, I OUT = 1 ma, T J = 25 C % accuracy (green mode) > 2 V, I OUT = 1 ma,-4 C < T J < 125 C -2 2 % 2 V, I OUT = 1 ma, T J = 25 C -2 2 mv 2 V, I OUT = 1 ma, -4 C < T J < 125 C -3 3 mv Δ Static line regulation (normal mode) Static line regulation (green mode) +.5V V IN 5.5 V, I OUT = 1 ma V IN > 1.4 V +.5 V V IN 5.5 V, I OUT = 1 ma V IN > 1.4 V.2.2 %/V.5 %/V Δ Static load regulation > 2 V, I OUT = 1 ma to 12 ma % 12 ma to 3 ma (normal mode).4 %/ma V DROP Dropout voltage (1) I OUT = 3 ma, > 2 V, -4 C < T J < 125 C 3 mv e N Output noise voltage 1 Hz to 1 khz, I OUT = 1 ma 1 µv RMS / 1 Hz to 1 khz, IOUT = 15 ma 38 SVR Supply voltage rejection = 1.5 V (normal mode) V IN = NOM + 1 V ±V RIPPLE, V RIPPLE =.1 V, freq. = 1 khz, I OUT = 3 ma V IN = NOM +.5 V ±V RIPPLE, V RIPPLE =.1 V, freq. = 1 khz, I OUT = 3 ma 7 65 db I Q Quiescent current (normal mode) Quiescent current (Green mode) I OUT = 1 ma 45 µa I OUT = ma 1 4 µa I Standby Standby current V IN input current in off mode: V EN = GND.1 1 µa I SC Short-circuit current R L = (current foldback protection) 5 ma I OUT Output current 3 ma V EN Enable input logic low V IN = 1.4 V to 5.5 V, -4 C < T J <1 25 C.4 V Enable input logic high V IN = 1.4 V to 5.5 V, -4 C < T J < 125 C 1 I EN Enable pin input current V SHDN = V IN 1 na I GH Normal mode switch threshold Change from light load to normal load V GM = GND 1 ma DS Rev 3 page 6/27

7 Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit I GL Green mode switch threshold Change from normal load to light load V GM = GND 1 2 V GM Green mode input logic low V IN = 1.4 V to 5.5 V, -4 C < T J < 125 C.4 V Green mode input logic high V IN = 1.4 V to 5.5 V, -4 C < T J < 125 C 1 I GM Green mode pin current 1 na T ON (3) Turn-on time 1 µs R ON Output voltage disharge path resistance V EN = GND 1 Ω T SHDN Thermal shutdown 16 C Hysteresis 2 C OUT Output capacitor Capacitance (see Section 7 Typical characteristics) µf 1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 1 mv below its nominal value. 2. On DFN6 package version only. 3. Turn-on time is time measured between the enable input just exceeding VEN high value and the output voltage just reaching 95% of its nominal value. T J = 25 C, V IN = (NOM) + 1 V, C IN = C OUT = 1 µf, I OUT = 1 ma, V EN = V IN, unless otherwise specified. Table 6. LD3913S electrical characteristics (adjustable version) Symbol Parameter Test conditions Min. Typ. Max. Unit V IN Operating input voltage V V ADJ V ADJ accuracy (fixed normal mode) I OUT = 5 ma, T J = 25 C mv I OUT = 5 ma, V GM = V IN, -4 C < T J < 125 C mv Static line regulation (normal mode) +.5 V V IN 5.5 V, I OUT = 1 ma, V IN > 1.4 V.2.2 %/V Δ Static line regulation (green mode) +.5V V IN 5.5 V, I OUT = 1 ma,.2 %/V V IN > 1.4 V Δ Static load regulation > 2 V, I OUT = 1 ma to 12 ma % 1 ma to 3 ma (normal mode).4 %/ma V DROP Dropout voltage (1) I OUT = 3 ma, > 2 V, -4 C < T J < 125 C 3 mv e N Output noise voltage 1 Hz to 1 khz, I OUT = 1 ma, = V ADJ 97 1 Hz to 1 khz, I OUT = 15 ma, = V ADJ 41 µv RMS SVR Supply voltage rejection = 1.5V (normal mode) V IN = NOM + 1 V ± V RIPPLE, V RIPPLE =.1 V, freq. = 1 khz, I OUT = 3 ma V IN = NOM +.5 V ± V RIPPLE, 7 65 db V RIPPLE =.1 V, Freq. = 1 khz, I OUT = 3 ma I Q Quiescent current (normal mode) I OUT = 1 ma 45 µa Quiescent current (Green mode) I OUT = ma.8 4 µa I Standby Standby current V IN input current in OFF MODE: V EN = GND.1 1 µa I SC Short-circuit current R L = (current foldback protection) 5 ma I OUT Output current 3 ma DS Rev 3 page 7/27

8 Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit Enable input logic low V IN = 1.4 V to 5.5 V, -4 C < T J < 125 C.4 V EN Enable input logic high V IN = 1.4 V to 5.5 V, -4 C < T J < 125 C 1 V I EN Enable pin input current V SHDN = V IN 1 na I GH Normal mode switch threshold Change from light load to normal load V GM = GND 1 ma I GL Green mode switch threshold Change from normal load to light load V GM = GND 1 2 Green mode input logic low V IN = 1.4 V to 5.5 V, -4 C < T J < 125 C.4 V GM Green mode input logic high V IN = 1.4 V to 5.5 V, -4 C < T J < 125 C 1 V I GM Green mode pin current 1 na T ON (2) Turn on time 1 µs R ON Output voltage discharge path resistance V EN = GND 1 Ω T SHDN Thermal shutdown 16 C Hysteresis 2 C OUT Output capacitor Capacitance (see Section 7 Typical characteristics) µf 1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 1 mv below its nominal value. 2. Turn-on time is time measured between the enable input just exceeding VEN high value and the output voltage just reaching 95% of its nominal value DS Rev 3 page 8/27

9 Application information 6 Application information 6.1 Output voltage setting for ADJ version In the adjustable version, the output voltage can be set from.8 V to the input voltage minus the voltage drop across the pass transistor (dropout voltage), by connecting a resistor divider between the ADJ pin and the output, allowing remote voltage sensing. The resistor divider can be determined using the following equation: Equation 2 = V ADJ 1 + R1 R2 with V ADJ =.8V typ. (1) Even if the regulator is stable with no load, the maximum value for R 2 should not exceed 2 MΩ in order to ensure the best dynamic performance. 6.2 Soft-start function The LD3913S has an internal soft-start circuit. By increasing the startup time up to 1 µs, without the need of any external soft-start capacitor, this feature keeps the regulator inrush current at startup under control. 6.3 Auto green mode function The LD3913S integrates an internal logic circuitry, which allows the regulator to be in ultra-low consumption mode (green mode), when the output current required is very low. When the auto green mode is enabled, the regulator automatically selects its operating mode, switching from a very low consumption operation at light loads, to a very fast transient response mode when the load current increases. In the LD3913S, in DFN6 package, this function can be disabled by the user, by means of an external logic pin (GM). When the GM pin is set at high logic level, the device always operates in normal mode (fast transient response), while if the GM pin is set low, the auto green mode is enabled. The LD3913SJ (CSP version) always operates in auto green mode. 6.4 Input and output capacitors The LD3913S requires external capacitors to ensure the regulator control loop stability. These capacitors must be selected to meet the requirements of minimum capacitance and equivalent series resistance (see Figure 33. Stability plan vs. (COUT, ESR) ). Locating the input/output capacitors as close as possible to the relative pins, is suggested Input capacitor A capacitor with a minimum value of 1 µf is required at the input voltage of the LD3913S. This capacitor must be located as close as possible to the input pin of the device and returned to a clean analog ground. Any good quality ceramic capacitor can be used Output capacitor The control loop of the LD3913S is designed to work with ceramic capacitors at the output. The output capacitor must meet the requirements for the minimum amount of capacitance and E.S.R. (equivalent series resistance) as shown in Figure 33. Stability plan vs. (COUT, ESR). The suggested value of 1 µf is a good choice to guarantee the stability of the regulator and to provide the optimum transient response. The output capacitor must maintain its ESR and capacitance in the stable region, over the full operating temperature range, to assure stability. DS Rev 3 page 9/27

10 Output discharge function 6.5 Output discharge function The LD3913S integrates a MOSFET connected between and GND. This transistor is activated when the EN pin goes to low logic level and has the function to quickly discharge the output capacitor when the device is disabled by the user. DS Rev 3 page 1/27

11 Typical characteristics 7 Typical characteristics (C IN = C OUT = 1 µf, V EN = V IN = 1.8 V, = V ADJ, T j = 25 C unless otherwise specified) Figure 6. Output voltage vs. temperature (V IN = 1.8 V, I OUT = 5 ma, normal mode) Figure 7. Output voltage vs. temperature (V IN = 1.8 V, I OUT = 3 ma, normal mode) 85 V IN = 1.8 V, I OUT = 5 ma, V EN = 1.8 V, V GM = 1 V (normal mode) 85 V IN = 1.8 V, I OUT = 3 ma, V EN = 1.8 V, V GM = 1 V (normal mode) Output Voltage [mv] Output Voltage [mv] Temperature [ C] Temperature [ C] Figure 8. Output voltage vs. temperature (V IN = 1.4 V, I OUT = 1 ma, auto green mode) Figure 9. Output voltage vs. temperature (V IN = 5.5 V, I OUT = 1 ma, auto green mode) 85 V IN = 1.4 V, I OUT = 1 ma, V EN = 1.4 V, V GM =.4 V (auto green mode) 85 V IN = 5.5 V, I OUT = 1 ma, V EN = 5.5 V, V GM =.4 V (auto green mode) Output Voltage [mv] Output Voltage [mv] Temperature [ C] Temperature [ C] Figure 1. Line regulation vs. temperature (normal mode) Figure 11. Line regulation vs. temperature (auto green mode).2 V IN =1.4 to 5.5 V, I OUT = 1 ma, V EN = V IN, V GM = 1 V (normal mode).2 V IN =1.4 to 5.5 V, I OUT = 1 ma, V EN = V IN, V GM =.4 V (auto green mode) Line regulation [%/V] Line regulation [%/V] Temperature [ C] Temperature [ C] DS Rev 3 page 11/27

12 Typical characteristics Figure 12. Load regulation vs. temperature (I OUT = 1 to 1 ma, normal mode) Figure 13. Load regulation vs. temperature (I OUT = 1 to 3 ma, normal mode).3 V IN =1.8 V, I OUT = 1 to 1 ma, V EN = V IN, V GM = 1 V (normal mode).5 V IN =1.8 V, I OUT = 1 to 3 ma, V EN = V IN, V GM = 1 V (normal mode) Load regulation [%/ma] Load regulation [%/ma] Temperature [ C] Temperature [ C] Figure 14. Load regulation vs. temperature (I OUT = 1 to 12 ma, auto green mode) Figure 15. Mode change thresholds vs. temperature V IN =1.8 V, I OUT = 1 to 12 ma, V EN = V IN, V GM =.4 V (auto green mode).5 7 V IN =1.8 V, I OUT = 1 ma, V EN = V IN, V GM = V (auto green mode) Green to Normal.45 6 Normal to Green Load regulation [%/ma] Mode change thresholds [ma] Temperature [ C] Temperature [ C] Figure 16. Quiescent current vs. temperature (I OUT = 1 ma, normal mode) Figure 17. Quiescent current vs. temperature (I OUT = 3 ma, normal mode) 8 V IN =1.8 V, I OUT = 1 ma, V EN = V IN, V GM = 1 V V IN =1.8 V, I OUT = 3 ma, V EN = V IN, V GM = 1 V Quiescent current [µa] Quiescent current [µa] Temperature [ C] Temperature [ C] DS Rev 3 page 12/27

13 Typical characteristics Figure 18. Quiescent current vs. temperature (no load, auto green mode) Figure 19. Shutdown current vs. temperature 5 V IN =1.8 V, I OUT = ma, V EN = V IN, V GM =.4 V 3 V IN =1.8 V, I OUT = ma, V EN = V IN, V GM = GND Quiescent current [µa] Quiescent current [µa] Temperature [ C] Temperature [ C] Figure 2. Quiescent current vs. input voltage (auto green mode) Figure 21. Quiescent current vs. input voltage (normal mode) I OUT =ma I OUT = ma Quiescent curr ent [µa] Quiescent current [µa] Inpu t Voltage [V] Input Voltage [V] Figure 22. Quiescent current vs. output current (auto green mode) Figure 23. Quiescent current vs. load current (normal mode) Quiescent current [µa] V IN =1.4V V IN =1.8V V IN =3.V V IN =5.5V Quiescent current [µa] Load current [ma] Load Current [ma] DS Rev 3 page 13/27

14 Typical characteristics Figure 24. Quiescent current vs. load current (light load) Figure 25. Short-circuit current vs. output voltage I OUT = ma V IN =2V, =V ADJ, T=25 C Quiescent current [µa] Green Mode High Green Mode Low Short circuit current [ma] Load current [ma] Output Voltage [mv] Figure 26. Foldback current vs. temperature Figure 27. Dropout voltage vs. temperature 6 V IN =1.8 V, = GND, V EN = V IN, V GM = 1 V 2 = 4.1 V Foldback curr ent [ma] Dropou t Voltage [mv] Iout=3mA Iout=1mA Temperature [ C] Temperature [ C] Figure 28. Dropout voltage vs. output current Figure 29. SVR vs. frequency (normal mode) 16 = 4.1 V 9 V IN =1.8 +/- 2 m V, I OUT = 1 ma, =.8 V, C IN = C OUT = 1 µf (normal mode) 14 8 Dropout Voltage [mv] SVR [db] Output current [ma] Frequency [Hz] DS Rev 3 page 14/27

15 LD3913S Typical characteristics Figure 3. SVR vs. frequency (green mode) Figure 31. Noise spectrum vs. frequency (VOUT = VADJ) VIN =1.8 +/- 2 m V, I OUT = 3 ma, VOUT =.8 V, C IN = COUT = 1 µf (green mode) 9 VOUT = VADJ SVR [db] 6. ILOAD = A 6 ILOAD = 1mA ILOAD = 3mA 5. en [uv / SQRT(Hz)] Frequency [Hz]. 1.E+1 1.E+2 1.E+3 1.E+4 1.E+5 Frequ ency [Hz] Figure 32. Noise spectrum vs. frequency (VOUT = 4.1 V) Figure 33. Stability plan vs. (COUT, ESR) 4 VOUT = 4.1 V ILOAD = A en [uv / SQRT(Hz)] ILOAD = 1mA ILOAD = 3mA 15. ESR@ 1KHz[Ω] STABILITY AREA E+1 1.E+2 1.E+3 1.E COUT [µf] (nominal value) 1.E+5 Frequ ency [Hz] Figure 34. Startup by enable (IOUT = ma, auto green mode) VIN =1.5 V, V EN = V to VIN, IOUT = ma, VOUT =.8 V, T r = 1 µs (auto green mode) Figure 35. Turn-off by enable (IOUT = ma, auto green mode) VIN =1.5 V, V EN = VIN to V, IOUT = ma, VOUT =.8 V, T f = 1 µs (auto green mode) VOUT VOUT VEN VEN DS Rev 3 page 15/27

16 Typical characteristics Figure 36. Startup by enable Figure 37. Turn-off by enable V IN =1.5 V, V EN = V to V IN, I OUT = 3 ma, =.8 V, T r = 1 µs (auto green mode) V IN = 1.5V, V EN = V IN to V, I OUT = 3 ma, =.8 V, T f = 1 µs, (auto green mode) I OUT I OUT V EN V EN Figure 38. Startup by enable (I OUT = 3 ma, normal mode) Figure 39. Turn-off by enable (I OUT = 3 ma, normal mode) V IN =1.5 V, V EN = V to V IN, V GM = V IN, I OUT = 3 ma, =.8 V, T f = 1 µs (fixed normal mode) V IN =1.5 V, V EN = V IN to V, V GM = V IN, I OUT = 3 ma, =.8 V, T f = 1 µs (fixed normal mode) I OUT I OUT V EN V EN Figure 4. Turn-on time Figure 41. Turn-off time V IN = V EN = V to 5.5 V, I OUT = 3 ma, =.8 V, T f = 5 µs V IN = V EN = 5.5 V to V, I OUT = 3 ma, =.8 V, T f = 5 µs I OUT I OUT V EN, V IN V EN, V IN DS Rev 3 page 16/27

17 Typical characteristics Figure 42. Line transient (auto green mode) Figure 43. Line transient (normal mode) V IN = V EN = 1.8 V to 2.3 V, I OUT = 1 ma, =.8 V, T f = 5 µs (green mode) V IN = V EN = 1.8 V to 2.3 V, I OUT = 12 ma, =.8 V, T f = 5 µs (normal mode) V EN, V IN V EN, V IN Figure 44. Load transient (I OUT = 1 to 3 ma, auto green mode) Figure 45. Load transient (I OUT = to 3 ma, auto green mode) I OUT = from 1 to 3 ma, =.8 V, T r = T f =.5 µs (auto green mode) I OUT = from to 3 ma, =.8 V, T r = T f =.5 µs (auto green mode) I OUT I OUT Figure 46. Load transient (I OUT = 1 to 3 ma, normal mode) Figure 47. Green mode transient I OUT = ma, =.8 V, T r = T f = 1 µs, V GM = from V to V in I OUT = from 1 to 3 ma, =.8 V, T r = T f = 5 µs, V GM = V in (normal mode) V GM I OUT DS Rev 3 page 17/27

18 Package information 8 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: ECOPACK is an ST trademark. 8.1 Flip-chip 4 package information Figure 48. Flip-chip 4 package mechanical outline rev 5 DS Rev 3 page 18/27

19 Flip-chip 4 package information Table 7. Flip-chip 4 mechanical data Dim. mm Min. Typ. Max. A A A b D D1.4 E E1.4 f SD/SE.2 ccc.2 Figure 49. Flip-chip 4 package footprint rev 5 DS Rev 3 page 19/27

20 DFN6 1.2x1.3 mm package information 8.2 DFN6 1.2x1.3 mm package information Figure 5. DFN6 1.2x1.3 mm package mechanical outline e BOTTOM VIEW b PIN#1 ID L L C A A1 C SEATING PLANE SIDE VIEW D PIN 1 E TOP VIEW rev 2 Table 8. DFN6 1.2x1.3 mm mechanical data Dim. mm Min. Typ. Max. A A b c.5 D 1.2 E 1.3 e.4 L L DS Rev 3 page 2/27

21 DFN6 1.2x1.3 mm package information Figure 51. DFN6 1.2x1.3 mm package footprint rev 2 DS Rev 3 page 21/27

22 Order codes 9 Order codes Table 9. Order codes Order codes DFN6 1.2x1.3 mm Flip-chip 4 LD3913SPUR Output voltages (V) Adjustable LD3913SJ1R 1. LD3913SJ12R 1.2 LD3913SJ18R 1.8 LD3913SPU25R LD3913SJ25R 2.5 LD3913SJ29R 2.9 LD3913SJ3R 3. LD3913SPU31R 3.1 LD3913SJ33R 3.3 LD3913SJ41R 4.1 Note: Other output voltage versions available on request. DS Rev 3 page 22/27

23 Revision history Table 1. Document revision history Date Revision Changes 8-Oct Initial release. 2-Jan Updated Figure 19: Quiescent current vs. input voltage (auto green mode) and Figure 23: Quiescent current vs. load current (light load) Updated Table 3: Thermal data, Table 4: ESD performance, Table 5: LD3913S/LD3913SJ electrical characteristics (fixed versions), Table 6: LD3913S electrical characteristics (adjustable version), Figure 19: Quiescent current vs. input voltage (auto green mode), Figure 23: Quiescent current vs. load current (light load), Figure 39: Turn-on time and Figure 41: Line transient (auto green mode). Minor text changes. 4-Apr Throughout document: - minor text and formatting changes In Table 1. Pin description: - updated GM and EN function descriptions Updated Figure 5. Typical application circuits Added Section 6.1 Output voltage setting for ADJ version Updated Section 7 Typical characteristics Updated Table 9. Order codes DS Rev 3 page 23/27

24 Contents Contents 1 Block diagrams Pin configuration Typical applications Maximum ratings Electrical characteristics Application information Output voltage setting for ADJ version Soft-start function Auto green mode function Input and output capacitors Input capacitor Output capacitor Output discharge function Typical characteristics Package information Flip-chip 4 package information DFN6 1.2x1.3 mm package information Order codes...22 Revision history...23 Contents...24 List of tables...25 List of figures...26 Disclaimer...27 DS Rev 3 page 24/27

25 List of tables List of tables Table 1. Pin description....3 Table 2. Absolute maximum ratings...5 Table 3. Thermal data....5 Table 4. ESD performance...5 Table 5. LD3913S/LD3913SJ electrical characteristics (fixed versions)... 6 Table 6. LD3913S electrical characteristics (adjustable version)... 7 Table 7. Flip-chip 4 mechanical data Table 8. DFN6 1.2x1.3 mm mechanical data... 2 Table 9. Order codes Table 1. Document revision history DS Rev 3 page 25/27

26 List of figures List of figures Figure 2. Block diagram (adjustable version)... 2 Figure 3. Block diagram (fixed version)... 2 Figure 4. Pin connection (top view)... 3 Figure 5. Typical application circuits...4 Figure 6. Output voltage vs. temperature (V IN = 1.8 V, I OUT = 5 ma, normal mode) Figure 7. Output voltage vs. temperature (V IN = 1.8 V, I OUT = 3 ma, normal mode) Figure 8. Output voltage vs. temperature (V IN = 1.4 V, I OUT = 1 ma, auto green mode) Figure 9. Output voltage vs. temperature (V IN = 5.5 V, I OUT = 1 ma, auto green mode) Figure 1. Line regulation vs. temperature (normal mode) Figure 11. Line regulation vs. temperature (auto green mode) Figure 12. Load regulation vs. temperature (I OUT = 1 to 1 ma, normal mode) Figure 13. Load regulation vs. temperature (I OUT = 1 to 3 ma, normal mode) Figure 14. Load regulation vs. temperature (I OUT = 1 to 12 ma, auto green mode) Figure 15. Mode change thresholds vs. temperature Figure 16. Quiescent current vs. temperature (I OUT = 1 ma, normal mode) Figure 17. Quiescent current vs. temperature (I OUT = 3 ma, normal mode) Figure 18. Quiescent current vs. temperature (no load, auto green mode) Figure 19. Shutdown current vs. temperature Figure 2. Quiescent current vs. input voltage (auto green mode) Figure 21. Quiescent current vs. input voltage (normal mode) Figure 22. Quiescent current vs. output current (auto green mode) Figure 23. Quiescent current vs. load current (normal mode) Figure 24. Quiescent current vs. load current (light load) Figure 25. Short-circuit current vs. output voltage Figure 26. Foldback current vs. temperature Figure 27. Dropout voltage vs. temperature Figure 28. Dropout voltage vs. output current Figure 29. SVR vs. frequency (normal mode) Figure 3. SVR vs. frequency (green mode) Figure 31. Noise spectrum vs. frequency ( = V ADJ ) Figure 32. Noise spectrum vs. frequency ( = 4.1 V) Figure 33. Stability plan vs. (COUT, ESR) Figure 34. Startup by enable (I OUT = ma, auto green mode) Figure 35. Turn-off by enable (I OUT = ma, auto green mode) Figure 36. Startup by enable Figure 37. Turn-off by enable Figure 38. Startup by enable (I OUT = 3 ma, normal mode) Figure 39. Turn-off by enable (I OUT = 3 ma, normal mode) Figure 4. Turn-on time Figure 41. Turn-off time Figure 42. Line transient (auto green mode) Figure 43. Line transient (normal mode) Figure 44. Load transient (I OUT = 1 to 3 ma, auto green mode) Figure 45. Load transient (I OUT = to 3 ma, auto green mode) Figure 46. Load transient (I OUT = 1 to 3 ma, normal mode) Figure 47. Green mode transient Figure 48. Flip-chip 4 package mechanical outline Figure 49. Flip-chip 4 package footprint Figure 5. DFN6 1.2x1.3 mm package mechanical outline Figure 51. DFN6 1.2x1.3 mm package footprint DS Rev 3 page 26/27

27 IMPORTANT NOTICE PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. 218 STMicroelectronics All rights reserved DS Rev 3 page 27/27