1 Overview. High Accuracy Low Dropout Voltage Tracking Regulator TLE4254

Transcription

1 High Accuracy Low Dropout Voltage Tracking Regulator TLE4254 Overview Features 70 ma output current capability Very tight output tracking tolerance to reference Output voltage adjustable down to 2.0 V Stable operation with µf ceramic output capacitor Flexibility of output voltage adjust higher or lower than reference, proportional to the reference voltage (version GA / EJ A) Status output to indicate short circuits at the output (version GS / EJ S) Very low dropout voltage of typ. 0.2 maximum output current Combined reference / enable input Very low current consumption in OFF mode Wide input voltage range -20 V V +45 V Wide temperature range: -40 C 50 C Output protected against short circuit to and battery nput protected against reverse polarity Overtemperature protection Green product (RoHS compliant) AEC qualified Functional Description PG-DSO-8 PG-DSO-8 exposed pad The TLE4254 is a monolithic integrated low-dropout voltage tracking regulator with high accuracy in small PG- DSO-8 packages. The C is designed to supply off-board systems, e. g. sensors in powertrain management systems under the severe conditions of automotive applications. Therefore, the C is equipped with additional protection functions against reverese polarity and short circuit to and battery. With supply voltages up to 40 V, the output voltage follows a reference voltage applied at the adjust input with very high accuracy. The reference voltage applied directly to the adjust input or by an e. g. external resistor divider can be 2.0 V at minimum. The output is able to drive loads up to 70 ma while the device follows with high accuracy the e. g. 5 V output of a main voltage regulator acting as reference. Type Package Marking TLE4254GA PG-DSO GA TLE4254GS PG-DSO GS TLE4254EJ A PG-DSO-8 exposed pad 4254EJA TLE4254EJ S PG-DSO-8 exposed pad 4254EJS Data Sheet Rev..2,

2 Overview The TLE4254 can be set into shutdown mode in order to reduce the current consumption to a minimum. This suits the C for low power battery applications. Versions GS and EJ S offer an open collector status output indicating an overvoltage and undervoltage error condition of the output voltage. Versions GA and EJ A allow setting the output voltage to higher value than the reference voltage by connecting a voltage divider to the feedback pin FB. Data Sheet 2 Rev..2,

3 Block Diagram 2 Block Diagram Saturation Control and Protection circuits Temperature control TLE4254GA TLE4254EJ A - + FB + EN/ ADJ - typ..4v = Figure Block Diagram TLE4254GA and TLE4254EJ A Saturation Control and Protection circuits Temperature control TLE4254GS TLE4254EJ S - + Status Generator ST + EN/ ADJ - typ..4v = Figure 2 Block Diagram TLE4254GS and TLE4254EJ S Data Sheet 3 Rev..2,

4 Pin Definitions and Functions 3 Pin Definitions and Functions 3. Pin Assignment TLE4254GA and TLE4254GS TLE 4254 GA TLE 4254 GS 7 6 FB 4 5 EN/ADJ ST 4 5 EN/ADJ Figure 3 Pin Configurations TLE4254GA and TLE4254GS 3.2 Pin Functions TLE4254GA and TLE4254GS Pin Symbol Function Tracker Output. Block to with a capacitor close to the C terminals, respecting capacitance and ESR requirements given in the table Functional Range. 2, 3, 6, 7 4 FB (version GA) 4 ST (version GS) Ground reference. nterconnect the pins on PCB. Connect to heatsink area. Feedback input (version GA only). Non inverting input of the internal error amplifier to control the output voltage. Connect this pin directly to the output pin in order to obtain lower or equal output voltages with respect to the reference voltage. Connect a voltage divider for higher output voltages than the reference. (See also application information.) Tracking Regulator Status Output (version GS only). Open collector output. Connect via a pull-up resistor to a positive voltage rail. A low signal indicates fault condions at the regulator s output. 5 EN/ADJ Adjust / Enable. Connect the reference to this pin. The active high signal of the reference turns on the device; a low signal disables the C. The reference voltage can be connected directly or by a voltage divider for lower output voltages (see application information). 8 nput. C supply. For compensating line influences, a capacitor close to the C terminals is recommended. Data Sheet 4 Rev..2,

5 Pin Definitions and Functions 3.3 Pin Assignment TLE4254EJ A and TLE4254EJ S Figure 4 Pin Configurations TLE4254EJ A and TLE4254EJ S 3.4 Pin Functions TLE4254EJ A and TLE4254EJ S Pin Symbol Function Tracker Output. Block to with a capacitor close to the C terminals, respecting capacitance and ESR requirements given in the table Functional Range. 2, 3, 7 n.c. 4 FB (version EJ A) 4 ST (version EJ S) not connected connect to Feedback input (version EJ A only). Non inverting input of the internal error amplifier to control the output voltage. Connect this pin directly to the output pin in order to obtain lower or equal output voltages with respect to the reference voltage. Connect a voltage divider for higher output voltages than the reference. (See also application information.) Tracking Regulator Status Output (version GS only). Open collector output. Connect via a pull-up resistor to a positive voltage rail. A low signal indicates fault condions at the regulator s output. 5 EN/ADJ Adjust / Enable. Connect the reference to this pin. The active high signal of the reference turns on the device; a low signal disables the C. The reference voltage can be connected directly or by a voltage divider for lower output voltages (see application information). 6 Ground reference. nterconnect the pins on PCB. Connect to heatsink area. 8 nput. C supply. For compensating line influences, a capacitor close to the C terminals is recommended. Pad Exposed Pad connect to Data Sheet 5 Rev..2,

6 General Product Characteristics 4 General Product Characteristics 4. Absolute Maximum Ratings Absolute Maximum Ratings ) -40 C 50 C; all voltages with respect to ground (unless otherwise specified). Not subject to production test; specified by design. Pos. Parameter Symbol Limit Values Unit Conditions Min. Max. Voltages 4.. nput voltage V V 4..2 Adjust / Enable input voltage V ADJ/EN V 4..3 Output voltage V V 4..4 Feedback input voltage (version V FB V GA / EJ A) 4..5 Status output voltage (version GS / EJ S) V ST V Temperatures 4..6 Junction Temperature C 4..7 Storage Temperature T stg C ESD Rating 4..8 ESD Susceptibility V ESD,HBM 4 kv HBM 2) 4..9 V ESD,CDM kv CDM 3) ) Not subject to production test, specified by design. 2) ESD susceptibility Human Body Model HBM according to AEC JESD22-A4 3) ESD susceptibility Charged Device Model CDM according to ESDA STM5.3. Note: Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note: ntegrated protection functions are designed to prevent C destruction under fault conditions described in the data sheet. Fault conditions are considered as outside normal operating range. Protection functions are not designed for continuous repetitive operation. Data Sheet 6 Rev..2,

7 General Product Characteristics 4.2 Functional Range Pos. Parameter Symbol Limit Values Unit Conditions Min. Max nput Voltage V 4 45 V V V + V dr 4.2. Adjust / Enable nput Voltage V ADJ/EN 2.0 V (Voltage Tracking Range) Junction Temperature C Output Capacitor C µf ) ESR C 5 Ω ) ) Not subject to production test; specified by design. Note: Within the functional range the C operates as described in the circuit description. The electrical characteristics are specified within the conditions given in the related electrical characteristics table. 4.3 Thermal Resistance Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max. PG-DSO-8: 4.3. Junction to Ambient R thja 55 K/W Footprint only K/W 300 mm 2 PCB heatsink area K/W 600 mm 2 PCB heatsink area ) 2) ) 2) 2) ) PG-DSO-8 exposed pad: Junction to Case R thjc 5 K/W measured to exposed pad Junction to Ambient R thja 47 K/W 3) K/W 2) ) Footprint only K/W 300 mm 2 2) ) PCB heatsink area K/W 600 mm 2 2) ) PCB heatsink area ) Not subject to production test; specified by design. 2) Package mounted on PCB FR4; 80 x 80 x.5 mm; 35 µm Cu, 5 µm Sn; horizontal position; zero airflow. 3) Specified R thja value is according to Jedec JESD5-2,-5,-7 at natural convection on FR4 2s2p board; The Product (Chip+Package) was simulated on a 76.2 x 4.3 x.5 mm³ board with 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu). Where applicable a thermal via array under the exposed pad contacted the first inner copper layer. Data Sheet 7 Rev..2,

8 Electrical Characteristics 5 Electrical Characteristics 5. Tracking Regulator The output voltage V is controlled by comparing it to the voltage applied at pin ADJ/EN and driving a PNP pass transistor accordingly. The control loop stability depends on the output capacitor C, the load current, the chip temperature and the poles/zeros introduced by the integrated circuit and the load. To ensure stable operation, the output capacitor s capacitance and its equivalent series resistor ESR requirements given in the table Functional Range have to be maintained. For details see also the typical performance graph Output Capacitor Series Resistor ESR C vs. Output Current. Also, the output capacitor shall be sized to buffer load transients. An input capacitor C is strongly recommended to buffer line influences. Connect the capacitors close to the C terminals. Protection circuitry prevent the C as well as the application from destruction in case of catastrophic events. These safeguards contain output current limitation, reverse polarity protection as well as thermal shutdown in case of overtemperature. n order to avoid excessive power dissipation that could never be handled by the pass element and the package, the maximum output current is decreased at high input voltages. The overtemperature protection circuit prevents the C from immediate destruction under fault conditions (e. g. output continuously short-circuited) by reducing the output current. A thermal balance below 200 C junction temperature is established. Please note that a junction temperature above 50 C is outside the maximum ratings and reduces the C lifetime. The TLE4254 allows a negative supply voltage. However, several small currents are flowing into the C increasing its junction temperature. This has to be considered for the thermal design, respecting that the thermal protection circuit is not operating during reverse polarity condition. Table Electrical Characteristics Tracking Regulator V = 3.5 V; V ADJ/EN 2.0 V; V FB = V (version GA / EJ A); -40 C 50 C; C = µf; all voltages with respect to ground (unless otherwise specified). Pos. Parameter Symbol Limit Values Unit Test Condition Min. Typ. Max. 5.. Output Voltage Tracking Accuracy V = V EN/ADJ - V V -5 5 mv 8 V V 8 V; 0. ma 60 ma; V ADJ/EN = 5 V mv 5.5 V V 26 V; 0. ma 60 ma; V ADJ/EN = 5 V mv 5.5 V V 32 V; 0. ma 30 ma; V ADJ/EN = 5 V 5..4 Load Regulation steady-state dv,load 0 mv = 0. ma to 70 ma; V ADJ/EN = 5 V 5..5 Line Regulation steady-state dv,line 0 mv V = 5.5 V to 32 V; = 5 ma V ADJ/EN = 5 V Data Sheet 8 Rev..2,

9 Electrical Characteristics Table Electrical Characteristics Tracking Regulator V = 3.5 V; V ADJ/EN 2.0 V; V FB = V (version GA / EJ A); -40 C 50 C; C = µf; all voltages with respect to ground (unless otherwise specified). Pos. Parameter Symbol Limit Values Unit Test Condition 5..6 Power Supply Ripple Rejection Min. Typ. Max. PSRR 60 db f ripple = 00 Hz; V ripple = Vpp = 5 ma C = 0 µf, ceramic type ) V mv = 70 ma 2) 5..7 Dropout Voltage V dr = V - V dr 5..8 Output Current Limitation,max ma V = (V ADJ/EN - 0. V); V ADJ/EN = 5 V 5..9 Reverse Current -4-2 ma V = 0 V; V = 32 V; V ADJ/EN = 5 V 5..0 Reverse Current at Negative nput Voltage -5-3 ma V = -6 V; V = 0 V; V ADJ/EN = 5 V Feedback nput FB (version GA / EJ A only): 5.. Feedback nput Biasing Current FB µa V FB = 5 V Overtemperature Protection: 5..2 Junction Temperature Equilibrium,eq C increasing due to power dissipation generated by the C ) ) Parameter not subject to production test; specified by design. 2) Measured when the output voltage V has dropped 00 mv from its nominal value. Data Sheet 9 Rev..2,

10 Electrical Characteristics Typical Performance Characteristics Tracking Regulator Tracking Accuracy V vs. Junction Temperature Output Capacitor Series Resistor ESR C vs. Output Current Output Capacitor Series Resistor ESR C vs. Output Current V [mv] dv-tj.vsd 0 ESR C [Ω] ESR-_u.vsd 0 ESR C [Ω] ESR-_470n.vsd 0 - = 0. ma Stable Region -2 = 70 ma Stable Region C = µf 6 V < V < 28 V -40 C < < 50 C C = 470 nf 6 V < V < 28 V -40 C < < 50 C [ C] [ma] [ma] Output Voltage V vs. Adjust Voltage V ADJ,EN Output Voltage V vs. nput Voltage V V-VADJ.vsd V-V.vsd V V = 3.5 V = 25 C V 5 V dr V ADJ = 5 V = 25 C V ADJ V Data Sheet 0 Rev..2,

11 Electrical Characteristics Typical Performance Characteristics Tracking Regulator Output Current Limitation,max vs. nput Voltage V, V ADJ,EN = 5V Output Current Limitation,max vs. nput Voltage V, V ADJ,EN = 2V Reverse Output Current vs. Output Voltage V 20 SOA_5V.VSD 20 SOA_2V.VSD + -V.vsd [ma] V ADJ = 5 V [ma] V ADJ = 2 V [ma] = 50 C - = -40 C = 25 C -2 = 50 C 40 = 50 C 40 = -40 C = 25 C = -40 C 20-4 V = 0 V V ADJ = 5 V V V V Dropout Voltage V dr vs. Output Current Dropout Voltage V dr vs. Junction Temperature Reverse Current vs. nput Voltage V 000 V dr [mv] Vdr-_log.vsd V dr [mv] = 70 ma Vdr-Tj.vsd + [ma] V = 0 V V ADJ = 5 V -V.vsd = -40 C = 50 C 50-4 = 25 C [ma] [ C] V Data Sheet Rev..2,

12 Electrical Characteristics 5.2 Current Consumption Table 2 Electrical Characteristics Current Consumption V = 3.5 V; V ADJ/EN 2.0 V; V FB = V (version GA / EJ A); -40 C 50 C; C = µf all voltages with respect to ground (unless otherwise specified). Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max uiescent Current Stand-by Mode q 5 µa V ADJ/EN 0.4 V; 25 C µa 00 µa; Current Consumption q = - q2 V ADJ/EN = 5 V ma 70 ma; V ADJ/EN = 5 V Typical Performance Characteristics Current Consumption uiescent Current q vs. Junction Temperature Current Consumption q2 vs. Output Current Current Consumption q vs. nput Voltage V q-tj.vsd q-_log.vsd q_v.vsd q [µa] V = 3.5V V EN/ADJ = 0.2 V 0 q [ma].8 q [ma] V ADJ = 5 V = ma = 25 C = 50 C.2 0, = -40 C , [ C] [ma] V Data Sheet 2 Rev..2,

13 Electrical Characteristics 5.3 Adjust / Enable nput n order to reduce the quiescent current to a minumum, the TLE4254 can be switched to stand-by mode by setting the adjust/enable input ADJ/EN to low. n case the pin ADJ/EN is left open, an internal pull-down resistors keeps the voltage at the pin low and therefore ensures that the regulator is switched off. Table 3 Electrical Characteristics Adjust / Enable V = 3.5 V; V ADJ/EN 2.0 V; V FB = V (version GA / EJ A); -40 C 50 C; C = µf all voltages with respect to ground (unless otherwise specified). Pos. Parameter Symbol Limit Values Unit Test Condition Min. Typ. Max Adjust / Enable Low Signal Valid Adjust / Enable High Signal Valid (Tracking Region) Adjust / Enable nput Current Adjust / Enable nput Current if nput tied to Adjust / Enable internal pull-down resistor V ADJ/EN,low 0.4 V V = 0 V; 5 25 C V ADJ/EN,high 2 V V settled ADJ/EN 2 3 µa V ADJ/EN = 5 V ADJ/EN ma V ADJ/EN = 5 V; V = 0 V R ADJ/EN MΩ Typical Performance Characteristics Adjust / Enable nput Adjust / Enable nput Current ADJ/EN vs. Adjust / Enable nput Current ADJ/EN vs. V Startup Sequence V vs. V ADJ,EN ADJ-Tj.vsd ADJ _V.v s d V-VADJ.vsd ADJ [µa ] 2.5 V = 3.5 V V ADJ = 5 V ADJ [µa] V V = 3.5 V = 25 C = 50 C 2 2. = -40 C [ C] V V ADJ Data Sheet 3 Rev..2,

14 Electrical Characteristics 5.4 Status Output (version GS / EJ S only) The status output ST indicates an overvoltage or undervoltage situation at the regulator s output. Therefore, the output voltage V is compared to the reference voltage V ADJ/EN. Variations of the output voltage are indicated by a low signal at the status output ST. Transients shorter than the status reaction time t ST,r will not trigger the status output. The status output ST is an open collector output, requiring a pull-up resisitor to a positive voltage rail. Table 4 Electrical Characteristics Status Output ST (Version GS / EJ S only) V = 3.5 V; V ADJ/EN 2.0 V; -40 C 50 C; C = µf all voltages with respect to ground (unless otherwise specified). Pos. Parameter Symbol Limit Values Unit Test Condition Min. Typ. Max Status switching threshold, undervoltage V,UV V ADJ/EN - 20 V ADJ/EN - 70 V ADJ/EN - 50 mv V decreasing Status switching threshold, overvoltage V,OV V ADJ/EN + 50 V ADJ/EN + 70 V ADJ/EN Status reaction time t ST,r µs Status output low voltage Status output sink current limitation Status output leakage current mv V increasing V ST,low 0.4 V ST = ma; V 4 V ST,max ma ST = ma; V ST = 0.8 V ST,leak 0 2 µa V = V ADJ/EN V ST = 5 V Data Sheet 4 Rev..2,

15 Application nformation 6 Application nformation Note: The following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device. The application circuits shown are simplified examples. The function must be verified in the real application. VBAT Main µc supply e.g. TLE427-2 TLE447 TLE VDD /O micro controller e.g. C67, XC6X TC7xx VREF 5 8 EN/ ADJ TLE4254GA TLE4254EJ A 2, 3, 6, 7 FB 4 e.g. off board supply, sensors VBAT Main µc supply e.g. TLE427-2 TLE447 TLE VDD micro controller e.g. C67, XC6X TC7xx /O /O VREF 5 EN/ ADJ ST 4 8 TLE4254GS TLE4254EJ S V < VREF 2, 3, 6, 7 Figure 5 Application circuit: Output voltage V equal to reference voltage V ADJ/EN Figure 5 shows a typical schematic for applications where the tracker output voltage V equals the reference voltage V REF applied to the pin EN/ADJ. At version GA / EJ A, the pin FB is directly connected to the output. The reference voltage is directly applied to EN/ADJ. Data Sheet 5 Rev..2,

16 Application nformation VBAT Main µc supply e.g. TLE427-2 TLE447 TLE VDD micro controller e.g. C67, XC6X TC7xx /O /O VREF R ADJ R2 ADJ 5 8 EN/ ADJ TLE4254GS TLE4254EJ S ST 4 V < VREF 2, 3, 6, 7 Figure 6 Application circuit: Output voltage V lower than reference voltage V REF Status Output feedbacked to microcontroller (version GS / EJ S) n order to obtain a lower output voltage V at the tracker output than the reference voltage V REF, a voltage divider according to Application circuit: Output voltage V lower than reference voltage VREF Status Output feedbacked to microcontroller (version GS / EJ S) has to be used. The output voltage V then calculates: R2 ADJ V = V REF R ADJ R2 ADJ With a given reference voltage V REF, the desired output voltage V and the resistor value R ADJ, the resistor value for R2 ADJ is given by: V R2 ADJ = R ADJ V REF V Taking into consideration also the effect of the internal EN/ADJ pull-down resistor, the external resistor divider s R2 ADJ has to be selected to: R2 ADJ select R2 ADJ R PullDown, min, = R PullDown, min R2 ADJ Data Sheet 6 Rev..2,

17 Application nformation VBAT Main µc supply e.g. TLE427-2 TLE447 TLE VDD /O micro controller e.g. C67, XC6X TC7xx VREF 5 8 EN/ ADJ TLE4254GA TLE4254EJ A FB 4 R FB V > VREF R2 FB 2, 3, 6, 7 Figure 7 Application circuit: Output voltage V higher than reference voltage V REF (version GA / EJ A only) For output voltages higher than the reference voltage, the voltage divider has to be applied between the feedback and the output according to Application circuit: Output voltage V higher than reference voltage VREF (version GA / EJ A only). The equation for the output voltage with respect to the reference voltage is given by: R FB R2 FB V = V + REF R2 FB Keep in mind that the input voltage has to be at minimum equal to the output voltage plus the dropout voltage of the regulator. With a given reference voltage V REF, the desired output voltage V and the resistor value R FB, the resistor value for R2 FB is given by: V REF R2 FB = R FB V V REF Data Sheet 7 Rev..2,

18 Package Outlines 7 Package Outlines 0.35 x 45 L ) ) ±0.07 (.45).75 MAX M A B 8x A B ) ±0.2 C ± MAX. 0.2 M C 8x B A e HLG05506 Reflow Soldering Dimensions: e =.27 A = 5.69 L =.3 B = 0.65 ndex Marking ) Does not include plastic or metal protrusion of 0.5 max. per side 2) Lead width can be 0.6 max. in dambar area GPS08 Figure 8 Outline and footprint PG-DSO-8 Find all packages, sorts of packing and others at the nfineon nternet Page Packages : Dimensions in mm Data Sheet 8 Rev..2,

19 Package Outlines 0.35 x Stand Off (.45).7 MAX. C 0.08 C Seating Plane 3.9 ±0. ) 0. CD2x ± MAX. 0.4±0.09 2) 0.2 M C A-B D 8x D 6 ± M D 8x Bottom View.27 ndex Marking A B 0. C A-B 2x 4.9 ±0. ) 3 ± ± PG-DSO-8-27-FP V0 ) Does not include plastic or metal protrusion of 0.5 max. per side 2) Dambar protrusion shall be maximum 0. mm total in excess of lead width 3) JEDEC reference MS-02 variation BA PG-DSO-8-27-PO V0 Outline and footprint PG-DSO-8 exposed pad Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pbfree finish on leads and suitable for Pb-free soldering according to PC/JEDEC J-STD-020). Data Sheet 9 Rev..2,

20 Revision History 8 Revision History Revision History: Updated Version, product versions TLE4254EJ A and TLE4254EJ S in PG-DSO- 8 exposed pad and all related description added Rev..2 Previous Version: Rev.. typing errors corrected Previous Version: Rev..0 Package Outlines on Page 8 Drawing Updated Data Sheet 20 Rev..2,

21 Edition Published by nfineon Technologies AG 8726 Munich, Germany 2009 nfineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, nfineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. nformation For further information on technology, delivery terms and conditions and prices, please contact the nearest nfineon Technologies Office ( Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest nfineon Technologies Office. nfineon Technologies components may be used in life-support devices or systems only with the express written approval of nfineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. f they fail, it is reasonable to assume that the health of the user or other persons may be endangered.