Power Management GM7110
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- Doris Boyd
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1 1 STEPDOWN OLTGE SWITCHG REGULTOR Description Features of regulators provides all the active functions for a step down (buck) switching regulator, and drives 1 load with excellent line and load regulation. is available in fixed output volt ages of 3.3, 5, 1, 15 and a versatile djustable output version. These regulators are simple to use and require a minimum number of external components. Features include internal frequency compensation and and is requiring a smaller heat sink or even no heat sink. performs well with standard inductors from several manufacturers, and simplifying the design of switchmode power supplies. guarantees ±% a fixed frequency oscillator. highefficiency replacement for popular threeterminal linear regulators, tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included with 50 u(typical) standby current. The output switch has cyclebycycle current limiting as well as thermal shutdown for full protection under fault conditions. 3.3, 5, 1, 15 and djustable output versions djustable version output voltage range 1.3 to 37 ±% max over line and load conditions 1 output current Requires Only External Components High Efficiency TTL shutdown capability and low power standby mode Thermal shutdown, current limit protection Uses standard inductors 5 khz fixed frequency internal oscillator pplication Preregulator for linear regulators Highefficiency stepdown buck regulator Oncard/ board switching regulators Positive to negative converter (buckboost) TYPICL PPLICTION 7 0 Unregulated DC Input C 100 µf 1 3 GND ON / OFF 5 L1 330 µh D1 1N5819 C 330 µf, 1 Regulated 0.1 GM
2 1 STEPDOWN OLTGE SWITCHG REGULTOR MRKG FORMTION & P CONFIGURTIONS TO0 5 TO0 5B TO55 (DPK) TO635(D PK) YWW YWW YWW YWW Ground ON/OFF Ground ON/OFF Ground ON/OFF Ground ON/OFF 1 3 5, = oltage (33=3.3, 10=1,=dj) = ssembly Location Y = Year W W = Weekly ORDERG FORMTION Ordering Number oltage Package Shipping TB5T d j TO05 TB5BT d j TO05B T5R d j TO Units/ Tape & Reel T5T d j TO TB5T 3.3 TO05 3.3TB5BT 3.3 TO05B 3.3T5R 3.3 TO Units/ Tape & Reel 3.3T5T 3.3 TO635 TB5T TO05 TB5BT TO05B T5R TO Units/ Tape & Reel T5T TO635 TC5T TO55 80 Units/ Tube TC5R TO55,500 Units/ Tape & Reel 1TB5T 1 TO05 1TB5BT 1 TO05B 1T5R 1 TO Units/ Tape & Reel 1T5T 1 TO635 15TB5T 15 TO05 15TB5BT 15 TO05B 15T5R 15 TO635 15T5T 15 TO635 * TB5B: Bent and Staggered Leads of TO0 package ** For detail Ordering Number identification, please see last page. 800 Units/ Tape & Reel
3 1 STEPDOWN OLTGE SWITCHG REGULTOR BSOLUTE MXIMUM RTGS PRMETER Maximum Supply oltage ON/OFF Pin Input oltage oltage to Ground (Steady State) Power Dissipation Storage Temperature Range Maximum unction Temperature Lead Temperature (Soldering, 10 sec.) LUE Internally Limited 65 to UNIT C C C RECOMMENDED OPERTG CONDITIONS PRMETER Temperature Range LUE UNIT 0 T 15 C Supply oltage 0 BLOCK DIGRM Unregulated DC Input 1 Internal Regulator ON/OFF 5 ON/OFF C R 1.0K R1 Fixed Gain Error MP Comparator Driver 1 MP Switch L1 1.3 BandGap Reference 5kHz Oscillator Reset Thermal Shutdown Current Limit 3 GND D1 C out L O D 3.3, R = 1.7K 5, R = 3.1K 1, R = 8.8K 15, R = 11.3K For D. ersion R1 = Open, R = 0W 3
4 1 STEPDOWN OLTGE SWITCHG REGULTOR ELECTRICL CHRCTERISTICS: 3.3 (Specifications with standard type face are for T = 5 C, and those with boldface type apply over full Operating Temperature Range) Parameter Conditions Symbol Min Typ Max Unit oltage = 1, I LOD = oltage.75 0, 0. I LOD / /3.65 Efficiency = 1, I LOD = 1 h 75 % ELECTRICL CHRCTERISTICS: (Specifications with standard type face are for T = 5 C, and those with boldface type apply over full Operating Temperature Range) Parameter Conditions Symbol Min Typ Max Unit oltage = 1, I = 0. LOD oltage 8 0, 0. I LOD 1.800/.750 0/5.50 Efficiency = 1, I LOD = 1 h 77 % ELECTRICL CHRCTERISTICS: 1 (Specifications with standard type face are for T = 5 C, and those with boldface type apply over full Operating Temperature Range) Parameter Conditions Symbol Min Typ Max Unit oltage = 5, I LOD = oltage 15 0, 0. I LOD / /1.60 Efficiency = 15, I LOD = 1 h 88 % ELECTRICL CHRCTERISTICS: 15 (Specifications with standard type face are for T = 5 C, and those with boldface type apply over full Operating Temperature Range) Parameter Conditions Symbol Min Typ Max Unit oltage = 30, I LOD = oltage 18 0, 0. I LOD 1 1.0/ /15.75 Efficiency = 18, I LOD = 1 h 88 % ELECTRICL CHRCTERISTICS: D (Specifications with standard type face are for T = 5 C, and those with boldface type apply over full Operating Temperature Range) Parameter Conditions Symbol Min Typ Max Unit oltage oltage Efficiency = 1, I = 0., = 5 LOD 8 0, 0. I LOD 1 = 5 = 1, I = 1.0, =5 LOD h / /1.80 %
5 1 STEPDOWN OLTGE SWITCHG REGULTOR ELECTRICL CHRCTERISTICS: ll oltage ersions (Specifications with standard type face are for T = 5 C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, = 1 for the 3.3, and D version, = 5 for 1 version. and = 30 for 15 version. I = 500 m) LOD Parameter Conditions Symbol Min Typ Max Unit Bias Current = 5 (djustable ersion Only) I FB / 500 n Oscillator Frequency (Note 11) F O 7 / 5 58 / 63 khz Saturation oltage I = 1 (Notes ) ST / 1. Max Duty Cycle (ON) (Note 5) T DC % Current Limit (Note, 11) I CL 1.7 / / 3. Leakage Current (Notes 6, 7) = 0 = 1 I OL m Quiescent Current (Note 6) I Q 5 10 m Standby Quiescent Current ON/OFF Pin = 5 (OFF) I STBY m Thermal Resistance TO0 Package, unction to mbient (Note 8) TO0 Package, unction to mbient (Note 8) TO0,TO63, Package, unction to Case TO5 Package, unction to Case TO63 Package, unction to mbient (Note 10) q q q C q C q C/W ON/OFF Pin =0 IH. /. 1. Logic Input Level = Nominal oltage IL / 0.8 ON/OFF Pin Input Current ON/OFF Pin = 5 (OFF) ON/OFF Pin = 0 (ON) IH I IL m m Note 1: bsolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indic ate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. Guaranteed specifications and Test conditions are shown in Electrical Characteristics. Note : ll limits guaranteed at 5 C (standard type face) and over full operating temperature range (bold type face). ll 5 C limits are 100% production tested. ll limits over full operating temperature range are guaranteed via correlation using standard Statistics Quality Control methods. Note 3: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the is used as shown in the Figure test circuit, system performance will be as shown in system parameters section of Electrical Characteristics. Note : pin sourcing current. No diode, inductor or capacitor connected to output. Note 5: pin removed from output and connected to 0. Note 6: pin removed from output and connected to 1 for the djustable, 3.3, and 5 versions, and 5 for the 1 and 15 versions, to force the output transistor OFF. Note 7: = 0 Note 8: unction to ambient thermal resistance (no external heat sink) for the 5 lead TO0 package mounted vertically, with ½ inch leads in a socket, or on a PC board with minimum copper area. Note 9: unction to ambient thermal resistance (no external heat sink) for the 5 lead TO0 package mounted vertically, with ¼ inch leads soldered to a PC board containing approximately square inches of copper area surrounding the leads. Note 10: If the TO63 package is used, the thermal resistance can be reduced by increasing the PC board Copper area thermally connected to the package. Using 0.5 square inches of copper area, q is 50 C//W, with 1 square inch of copper area, q is 37 C/W, and with 1.6 or more square inches of copper area, q is 3 C/W. Note 11: The oscillator frequency reduces to approximately 11 khz in the event of an output short or an Overload which causes the regulated output voltage to drop approximately 0% from the nominal output voltage. This selfprotection feature lowers the verage power dissipation of Gm7110 By lowering the minimum duty cycle from 5% down to approximately %. 5
6 1 STEPDOWN OLTGE SWITCHG REGULTOR TEST CIRCUIT ND LY GUIDELES Careful layout is important with any switching regulator. Rapidly switching currents associated with wiring inductance generate voltage transients, which can cause problems. To minimize inductance and ground loops, the lengths of the leads indicated by heavy lines in Figure 1 below should be kept as short as possible. Singlepoint grounding (as indicated in Figure 1) or ground plane construction should be used for best results. When using the djustable version, place the programming resistors as close as possible to, to keep the sensitive feedback wiring short. Figure 1(a). Fixed oltage ersions GM FIXED PUT L1 GND 3 ON/OFF µh Unregulated DC Input C 100 µf D1 MBR360 C 330 µf L O D C 100 µf, 75, luminum Electrolytic C 330 µf, 5, luminum Electrolytic D1 Schottky, MBR360 L1 330 µh, 3L Electronic Corp. TC331M R1 k, 0.1% R 6.1k, 0.1% 6
7 1 STEPDOWN OLTGE SWITCHG REGULTOR Figure 1(b).djustable oltage ersions 7 0 Unregulated DC Input 1 D 330 µh GND 3 ON/ OFF 5 R D1 L C MBR360 O 100 µf C 330 µf D R1 L1 = R = REF ( 1 ) R1 REF R = R1 ( 1) where = 1.3, R1 between 1k and 5k. REF Typical Performance Characteristics STURTION OLTGE () Figure. Switch Saturation oltage T = 5 C T = 150 C T = 55 C SWITCH CURRENT () PUTPUT DIFFERENTIL () Figure 3. Dropout oltage I = 1 LOD I = 00m LOD D = 5% R = 0.W D UNCTION TEMPERTURE ( C) 7
8 1 STEPDOWN OLTGE SWITCHG REGULTOR Typical Performance Characteristics QUIESCENT CURRENT (m) Figure. Quiescent Current I = 1 LOD I = 00m LOD PUT OLTGE () = 5 Measured at Ground Pin T = 5 C POWER DISSIPTION (W) Figure 5. Maximum Power Dissipation(TO63) 3 q = 3 C/ W q = 37 C/ W 1 q = 50 C/ W q = 73 C/ W MBIENT TEMPERTURE ( C) PUT OLTGE () Figure 6. Minimum Operating oltage djustable ersion Only = 1.3 I = 10 m LOD UNCTION TEMPERTURE ( C) CURRENT(µ) Figure 7. ON / OFF Pin Current (Sinking) = 0 0 C T 15 C ON / OFF P OLTGE () 8
9 1 STEPDOWN OLTGE SWITCHG REGULTOR TO05 PCKGE LE DIMENSIONS 3.60 ± ± ± ± ± ± ± DP ± ± ± ± MX ± ± R ± ± (TYP) 3 3 R ± 0.0 Unit: mm TO635 PCKGE LE DIMENSIONS DP Pad Layout R0.30 R TYP (1.70 ± 0.0) R R Unit: mm Units: mm 9
10 1 STEPDOWN OLTGE SWITCHG REGULTOR TO05B PCKGE LE DIMENSIONS 0. ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± TYP TYP ± ± ± ± ± ± 0.11 Inches ( ) mm TO55 PCKGE LE DIMENSIONS 0.56 ± ± Ref Ref 0.1 ± ± ± ± ± 0.0 Pad Layout 7 0. ± ± ± ± ± ± ± ± ± ± ± ± ± ± BSC 1.70BSC ± ± ± ± 0.05 Inches ( ) mm Units: mm 10
11 1 STEPDOWN OLTGE SWITCHG REGULTOR ORDERG NUMBER GM 7110 TB5 T Gamma Micro. Shipping R: Tape & Reel T: Tube Circuit Type Package T5: TO635 TB5: TO05 TC5: TO55 oltage : dj, 3.3: 3.3 :, 1: 1 15: 15 11
12 1 STEPDOWN OLTGE SWITCHG REGULTOR 1
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