GM7130-12TB5T

MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS Description GM7130 of regulators provides all the active functions for a step- down (buck) switching regulator, and drives 3A load with excellent line and load regulation. GM7130 is available in fixed output voltages of 3.3V, 5V, 12V 15V , and a versatile Adjustable output version. These regulators are simple to use and require a minimum number of external components. Features include internal frequency compensation and a fixed-frequency oscillator. The GM7130 is high-efficiency replacements for popular three-terminal linear regulators, and is requiring a smaller heatsink or even no heatsink. GM7130 performs well with standard inductors from several manufacturers, and simplifying the design of switch-mode power supplies. GM7130 guarantees ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is induced with 50 uA (typical) standby current. The output switch has cycle-by-cycle current limiting as well as thermal shutdown for full protection under fault conditions. Features 3.3V, 5V, 12V, 15V, Adjustable output versions Adjustable version output voltage range 1.23V to 37V ±4% max over line and load conditions 3A output current Input voltage range 7V to 40V Requires only 4 external components High efficiency TTL shutdown capability, low power standby mode Thermal shutdown, current limit protection Uses standard inductors 52 kHz fixed frequency internal oscillator Application Pre-regulator for linear regulators High-efficiency step-down buck regulator On-card/ board switching regulators Positive to negative converter (buck-boost) TYPICAL APPLICATIONS 7V - 40V Unregulated DC Input +VIN 1 GM7130-5.0 Output 2 3 GND 5 ON/ OFF D1 1N5822 100 µH L1 + +5V Regulated Output 3A Load + CIN 100 µF COUT 680 µF www.gammamicro.com GM7130 V0.1 1 Feedback 4 GM 431 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS MARKING INFORMATION & PIN CONFIGURATIONS (Top View) TO-220-5 TO-220- 5B TO-263-5(D PAK) 2 . . GM7130 V VAYWW GM7130 VVAYWW . GM7130 VVAYWW VIN Output Ground VIN Output Ground 1 23 45 ON/OFF Feedback VIN Output Ground ON/OFF Feedback ON/OFF Feedback V V, VVV A Y WW = Output Voltage (33 = 3.3V, 120= 12V, A =A dj ) = Assembly Location =Year =Weekly ORDERING INFORMATION Ordering Number GM7130-ATB5T GM7130-ATB5BT GM7130-ATA5R GM7130-ATA5T GM7130-3.3TB5T GM7130-3.3TB5BT GM7130-3.3TA5R GM7130-3.3TA5T GM7130-5.0TB5T GM7130-5.0TB5BT GM7130-5.0TA5R GM7130-5.0TA5T GM7130-12TB5T GM7130-12TB5BT GM7130-12TA5R GM7130-12TA5T GM7130-15TB5T Output Voltage Adj Adj Adj Adj 3.3 3.3 3.3 3.3 5.0 5.0 5.0 5.0 12 12 12 12 15 15 15 15 Package TO-220-5 TO-220-5B TO-263-5 TO-263-5 TO-220-5 TO-220-5B TO-263-5 TO-263-5 TO-220-5 TO-220-5B TO-263-5 TO-263-5 TO-220-5 TO-220-5B TO-263-5 TO-263-5 TO-220-5 TO-220-5B TO-263-5 TO-263-5 Shipping 50 Units / Tube 50 Units / Tube 800 Units/ Tape & Reel 50 Units / Tube 50 Units / Tube 50 Units / Tube 800 Units/ Tape & Reel 50 Units / Tube 50 Units / Tube 50 Units / Tube 800 Units/ Tape & Reel 50 Units / Tube 50 Units / Tube 50 Units / Tube 800 Units/ Tape & Reel 50 Units / Tube 50 Units / Tube 50 Units / Tube 800 Units/ Tape & Reel 50 Units / Tube GM7130 GM7130-15TB5BT GM7130-15TA5R GM7130-15TA5T * TB5B: Bent and Staggered Leads of TO-220 package ** For detail Ordering Number identification, please see last page. 2 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS ABSOLUTE MAXIMUM RATINGS Rating Maximum Supply Voltage ON/OFF Pin Input Voltage Output Voltage to Ground (Steady State) Power Dissipation Storage Temperature Range Maximum Junction Temperature Minimum ESD Rating (C=100pF, R=1.5kW) Lead Temperature (Soldering, 10 seconds) Value 45 -0.3 V VIN -1.0 Internally Limited -65 to + 150 +150 2 +260 Unit V V V - °C °C kV °C OPERATING RATINGS Rating Operating Temperature Range Supply Voltage -40 Value TJ 40 125 Unit °C V BLOCK DIAGRAM Unregulated DC Input V IN 1 4 Feedback R2 + 1.0K R1 Fixed Gain Error AMP Internal Regulator ON/OFF 5 ON/OFF + CIN Comparator + - 3 AMP Switch Driver Output L1 2 1.23V Band-Gap Reference D1 52kHz Oscillator Reset Thermal Shutdown Current Limit + VOUT 3 GND C out L O A D GM7130 3 GM 431 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS ELECTRICAL CHARACTERISTICS: GM7130-3.3 (Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range) Parameter Output Voltage Output Voltage - GM7130 Efficiency 6V Conditions VIN = 12V, ILOAD = 0.5A V IN 40V, 0.5A ILOAD 3.0A Symbol VOUT VOUT h Min 3.234 Typ 3.3 Max 3.366 Unit V V % 3.168/ 3.135 3.3 3.432/ 3.465 - VIN = 12V, ILOAD = 3.0A 75 - ELECTRICAL CHARACTERISTICS: GM7130-5.0 (Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range) Parameter Output Voltage Output Voltage - GM7130 Efficiency 8V Conditions VIN = 12V, ILOAD = 0.5A V IN 40V, 0.5A ILOAD 3.0A Symbol VOUT VOUT h Min 4.900 Typ 5.0 Max 5.100 Unit V V % 4.800/ 4.750 5.0 5.200/ 5.250 - VIN = 12V, ILOAD = 3.0A 77 - ELECTRICAL CHARACTERISTICS: GM7130-12 (Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range) Parameter Output Voltage Output Voltage - GM7130 Efficiency 15V Conditions VIN = 25V, ILOAD = 0.5A VIN 40V, 0.5A ILOAD 3.0A VIN = 15V, ILOAD = 3.0A Symbol VOUT VOUT h Min 11.76 Typ 12.0 Max 12.24 Unit V V % 11.52/ 11.40 12.0 12.48/ 12.60 - 88 - ELECTRICAL CHARACTERISTICS: GM7130-15 (Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range) Parameter Output Voltage Output Voltage - GM7130 Efficiency Conditions VIN = 25V, ILOAD = 0.5A 18V VIN 40V, 0.5A ILOAD 3.0A VIN = 18V, ILOAD = 3.0A Symbol VOUT VOUT h Min 14.70 Typ 15.0 Max 15.30 Unit V V % 14.40/14.25 15.0 15.60/ 15.75 - 88 - GM7130 4 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS ELECTRICAL CHARACTERISTICS: GM7130-ADJ (Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range) Parameter Feedback Voltage Feedback Voltage - GM7130 Efficiency Conditions VIN = 12V, ILOAD = 0.5A, VOUT = 5V 8V VIN 40V, 0.5A ILOAD 3.0A VOUT = 5V VIN = 12V, ILOAD = 3A, VOUT=5V Symbol VOUT VOUT h Min 1.217 Typ 1.230 Max 1.243 Unit V V % 1.193/1.180 1.230 1.267/1.280 77 - ELECTRICAL CHARACTERISTICS: All Output Voltage Versions (Specifications with standard type face are for TJ = 25 C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN= 12V for the 3.3V, 5.0V and ADJ version, VIN= 25V for 12V version. and VIN= 30V for 15V version. ILOAD = 500 mA) Parameter Feedback Bias Current Oscillator Frequency Saturation Voltage Max Duty Cycle (ON) Current Limit Output Leakage Current Quiescent Current Standby Quiescent Current Conditions VOUT = 5V (Adjustable Version Only) (Note 11) IOUT = 3A (Notes 4) (Note 5) (Note 4, 11) (Notes 6, 7) Output = -1 V Output = -1V Symbol Ib fo VSAT DC ICL IL IQ ISTBY qJA qJA qJC qJA VIH VIL IIH IIL Min 47 / 42 93 4.2 / 3.5 2.2 / 2.4 - Typ 50 52 1.4 98 5.8 7.5 5 50 65 45 2 50 1.4 1.2 12 0 Max 100 / 500 58 / 63 1.8 / 2.0 6.9 / 7.5 2 30 10 200 -1.0 / 0.8 30 10 Unit nA kHz V % A mA mA µA (Note 6) ON/OFF Pin = 5V (OFF) TO-220 Package, Junction to Ambient (Note 8) Thermal Resistance TO-220 Package, Junction to Ambient (Note 9) TO-220,TO-263 Package, Junction to Case TO-263 Package, Junction to Ambient (Note 10) °C/W ON/OFF Pin Logic Input Level VOUT=0V VOUT = Nominal Output Voltage ON/OFF Pin = 5V (OFF) V V µA µA ON/OFF Pin Input Current ON/OFF Pin = 0V (ON) GM7130 5 GM 431 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate 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 2: All limits guaranteed at 25°C (standard type face) and over full operating temperature range (bold type face). All 25°C limits are 100% production tested. All limits over full operating temperature range are guaranteed via correlation using standard Statistica 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 GM7130 is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics. Note 4: Output pin sourcing current. No diode, inductor or capacitor connected to output. Note 5: Feedback pin removed from output and connected to 0V. Note 6: Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V versions, and +25V for the 12V and 15V versions, to force the output transistor OFF. Note 7: VIN = 40V Note 8: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads in a socket, or on a PC board with minimum copper area. Note 9: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ¼ inch leads soldered to a PC board containing approximately 4 square inches of copper area surrounding the leads. Note 10: If the TO-263 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, qJA is 50°C//W, with 1 square inch of copper area, qJA is 37°C/W, and with 1.6 or more square inches of copper area, qJA is 32°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 40% from the nominal output voltage. This self- protection feature lowers the Average power dissipation of GM7130 by lowering the minimum duty cycle from 5% down to approximately 2%. GM7130 6 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS TEST CIRCUIT AND LAYOUT GUIDELINES 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 Adjustable version, place the programming resistors as close as possible to Gm7130, to keep the sensitive feedback wiring short. Figure 1(a). Fixed Output Voltage Versions GM 7130FIXED OUTPUT ON/OFF 5 + D1 COUT 680 µF L O A D Feedback 4 Output 2 GND 3 VIN Unregulated DC Input + CIN 100 µF L1 100 µH VOUT +VIN 1 CIN - 100 µF, 75V, Aluminum Electrolytic COUT - 680 µF, 25V, Aluminum Electrolytic D1 - Schottky, MBR360 L1 - 100 µH, 3L Electronic Corp. TC-101M-3.0A-6826 R1 - 2k, 0.1% R2 - 6.12k, 0.1% Feedback +VIN 1 7V - 40V Unregulated DC Input GND 3 + CIN 100 µF D1 MBR360 ON/ OFF 5 + COUT 680 µF 4 GM7130-ADJ Output 2 L1 100 µH R2 L O A D VOUT=5.0V R1 VOUT = VREF ( 1 + VOUT R2 = R1 ( V -1) REF R2 ) R1 where VREF = 1.23V, R1 between 1k and 5k. Figure 1(b). Adjustable Output Voltage Versions GM7130 7 GM 431 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS Typical Performance Characteristics Figure 2. Switch Saturation Voltage 1.6 1.4 SATURATION VOLTAGE (V) 6.5 Figure 3. Current Limit VIN = 25V 1.2 1.0 0.8 -55°C OUTPUT CURRENT (A) 6.0 5.5 25°C 0.6 0.4 0.2 0 0 0.5 1.0 1.5 2.0 2.5 3.0 SWITCH CURRENT (A) 5.0 150 °C 4.5 4.0 -75 -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (°C) Figure 4. Dropout Voltage 2.0 INPUT-OUTPUT DIFFERENTIAL (V) ILOAD = 3A 1.5 ILOAD = 1A 1.0 ILOAD = 200mA 0.5 QUIESCENT CURRENT(mA) L1 = 150 µH 20 18 16 14 12 10 8 6 4 0 Figure 5. Quiescent Current VOUT = 5V Measured at Ground Pin TJ = 25° ILOAD = 3A 0 -75 -50 -25 RIND = 0.1W 0 25 50 75 100 125 150 ILOAD = 200mA 10 20 30 40 50 60 JUNCTION TEMPERATURE (°C) INPUT VOLTAGE (V) SATURATION QUIESCENT CURRENT (µA) Figure 6. Standby Quiescent Current 200 5.0 Figure 7. Minimum Operating Voltage Adjustable Version Only 4.5 4.0 INPUT VOLTAGE (V) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 VOUT 1.23V ILOAD = 500 mA -25 0 25 50 75 100 125 JUNCTION TEMPERATURE (°C) VIN = 40V 150 V ON / OFF = 5V 100 GM7130 50 VIN = 12V 0 -50 -25 0 25 50 75 100 JUNCTION TEMPERATURE (°C) 125 0 -50 8 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS Typical Performance Characteristics Figure 8. Quiescent Current vs. Duty Cycle 20.0 QUIESCENT CURRENT (mA) 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0 0 ILOAD = 500mA 20 40 60 80 100 VIN = 7V VIN = 40V FEEDBACK VOLTAGE CHANGE (mV) Adjustable Version Only Figure 9. Feedback Voltage vs. Duty Cycle 20.0 15.0 10.0 5.0 0 -5.0 -10.0 -15.0 -20.0 0 20 40 60 80 100 DUTY CYCLE (%) VIN = 7V VIN = 40V Adjustable Version Only ILOAD = 500mA DUTY CYCLE (%) Figure 10. Maximum Power Dissipation(TO-263) 100 Figure 11. Feedback Pin Current Adjustable Version Only POWER DISSIPATION (W) 4 3 2 1 0 0 qJA = 32°C/ W qJA = 37°C/ W FEEDBACK PIN CURRENT (nA) 75 50 25 0 -25 -50 -75 -100 -75 -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (°C) qJA = 50°C/ W qJA = 73°C/ W 10 20 30 40 50 60 70 80 90 100 AMBIENT TEMPERATURE (°C) GM7130 9 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS Typical Performance Characteristics Figure 12. Switching Waveforms Figure 13. Load Transient Response Output Voltage Change 100mv/ div Inductor Current 1A/ div 3A Load Current 10mA 1kHz Input : 12V Output : 5V @3A MAXIMUM INPUT VOLTAGE(V) MAXIMUM INPUT VOLTAGE(V) MAXIMUM INPUT VOLTAGE(V) 00 µH 0µ 15 47 00 0µ 10 33 0µ 0µ 33 22 10 15 68 6 47 µH 8 68 µH 100µH 68µH 10 16 15 14 0.3 150µH 0µ 7 µH H 220µH 0µ 18 10 9 0µ 0µ 8 15 H H 20 22 12 0µ H H 330µH 47 H 10 680µH 0µ H 25 470µH 68 40 20 15 68 H 10 0µ 40 35 30 0µ µH 00 µH H 40 20 15 H H H 47 µH 5 0.3 0.4 0.5 0.6 0.8 1 1.5 2 2.5 3 0.4 0.5 0.6 0.70.8 1.0 1.5 2.0 2.5 3.0 7 0.3 0.4 0.5 0.60.8 1 1.2 1.5 2 2.5 3 MAXIMUM LOAD CURRENT(A) MAXIMUM LOAD CURRENT(A) MAXIMUM LOAD CURRENT(A) Figure 14. GM7130 -3.3 Figure 15. GM7130 - 12 Figure 16. GM7130 -5.0 150 15 MAXIMUM INPUT VOLTAGE(V) 100 90 80 70 60 50 45 40 35 30 25 20 0.3 00 µH 00 µH 0µ H 10 PROCEDURE(Adjustable Output Voltage Versions) Given: 47 H 0µ 68 33 0µ H 22 0µ H 15 0µ H VOUT = Regulated Output Voltage VIN(Max) = Maximum Input Voltage ILOAD(Max) = Maximum Load Current F = Switching Frequency (Fixed at 52 kHz) 0µ H 68 µH 10 1. Programming Output Voltage(Selecting R1 and R2, as shown in Figure 12. And Figure 13. Use the following formula to select the appropriate resistor values. VOUT = VREF ( 1+ R2 ) R1 where VREF = 1.23V 0.4 0.5 0.6 0.7 0.8 1.0 1.5 2..0 2.5 3.0 MAXIMUM LOAD CURRENT(A) Figure 17. GM7130 - ADJ VOUT 1,000 E • T = (VIN - VOUT) • VIN F(in kHz) R1 can be between 1k and 5k. (For best temperature coefficient and stability with time, use 1% metal film resistors) R2 = R1 ( VOUT -1) VREF GM7130 EXAMPLE (Adjustable Output Voltage Versions) Given: VOUT = 10V VIN(Max) = 25V ILOAD(Max) =3A F = 52kHz 1. Programming Output Voltage (Selecting R1 and R2) R2 VOUT = 1.23 (1+ ) Select R1 = 1k R1 VOUT 10V R2 = R1( -1) = 1k ( -1) 1.23V VREF R2 = 1k (8.13 - 1) = 7.13k, closest 1% value is 7.15k 10 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS Inductor Selection by Manufacturer's Part Numbe. Inductor Value 47µH 68µH 100µH 150µH 220µH 330µH 470µH 680µH 1000µH 1500µH 3L Electronic Corp. TC-470M-3A-5026 TC-680M-3A-5026 TC-101M-3A-5026 TC-151M-3A-8026 TC-221M-3A-8026 TC-331M-3A-8026 TC-471M-3A-8026 TC-681M-3A-8026 TC-102M-3A-9426 TC-152M-3A-9426 3L Electronic Corp., + 886(2) 86659999 Website : www.3lcoil.com.tw Capacitor Selection by Manufacturer's Part Number Capacitor Value 100µF 220µF 470µF 680µF 1000µF Nippon ChemiI - Con Corp. KY50VB100-MH11 KY50VB220-MJ16 KY50VB470-MJ30 KY50VB680-MK30 KY50VB1000-ML25 Nippon Chemi-Con Corp. , + 81(3)54367628 Website : www.chemi-con.co.jp GM7130 11 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS TO-220-5 PACKAGE OUTLINE DIMENSIONS 9.97 ± 0.20 9.90 ± 0.20 3.60 ± 0.20 1.30 ± 0.10 1.70 1.50 DP0.20 9.20 ± 0.20 3.70 ± 0.20 4.60 15.90 ± 0.20 3° 7.0 ± 0.20 28.78 MAX 9.20 ± 0.20 3° 3° 8.70 2.80 ± 0.10 4.50 ± 0.20 8.0 ± 0.20 +0.1 1.30 -0.05 7.0 8.40 1.2 13.08 ± 0.20 3-R0.2 5-0.8 ± 0.10 0.50 -0.05 +0.1 2.40 ± 0.20 1.7(TYP) 3° 3° 2 - R 0.3 Unit: mm 10.00 ± 0.20 TO-263-5 PACKAGE OUTLINE DIMENSIONS 9.90 0.40 15° 1.20 3° 4.60 1.50 DP0.20 9.20 4.50 1.30 Pad Layout 15.3 2.00 0.10 3° 17.5 9 3.8 1.7 11.5 1.20 4.90 0.75 R0.30 2.40 R0.30 2.54 0.50 1.70 TYP (1.70 ± 0.20) 0.80 0.40 10.0 8.0 7.0 4.40 1.07 GM7130 1.75 3° R 0.3 3° 0.90 R 0.45 7.2 9.20 15.30 10.00 Units: mm 4.90 12 Unit: mm MICROELECTRONICS A A Power Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS T O-220-5B PACKAGE OUTLINE DIMENSIONS 0.18 ± 0.004 4.57 ± 0.1 0.4 ± 0.006 10.16 ± 0.15 0.108 ± 0.006 2.74 ± 0.15 0.05 ± 0.004 1.27 ± 0.1 0.151 ± 0.002 3.84 ± 0.05 0.05 ± 0.004 1.27 ± 0.1 0.032 ± 0.004 0.81 ± 0.1 0.138 ± 0.004 3.5 ± 0.1 0.9645 ± 0.0075 24.5 ± 0.2 0.4985 ± 0.0075 12.66 ± 0.2 0.358 ± 0.008 9.1± 0.2 0.996 ± 0.008 25.3± 0.2 0.105 ± 0.006 2.76± 0.15 0.213 ± 0.004 5.4 ± 0.1 0.1535 ± 0.0035 3.9 ± 0.1 0.220 TYP 1.700 TYP 0.268 ± 0.004 0.68 ± 0.1 0.173 ± 0.006 4.4 ± 0.15 0.331 ± 0.006 8.4 ± 0.15 0.0165 ± 0.0045 0.42 ± 0.11 ( Inches ) mm ORDERING NUMBER GM 7130 A TB5 T Gamma Micro. Shipping R: Tape & Reel T: Tube Circuit Type Package TA5: TO-263-5 TB5: TO-220-5 TB5B: TO-220-5B Output Voltage A: Adj, 3.3: 3.3V 5.0: 5.0V, 12: 12V 15: 15V GM7130 13 MICROELECTRONICS A A P ower Management GM7130 3A STEP-DOWN VOLTAGE SWITCHING REGULATORS GM7130 14