GM7130 3A STEP-DOWN VOLTAGE REGULATORS Power Management Features Description 3.3V, 5V, 12V, 15V, Adjustable output versions The GM7130 series of regulators provide all the active functions for a step-down (buck) switching regulator, and drive 3A load with excellent line and load regulation. GM7130's are 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 series are high-efficiency replacements for popular three-terminal linear regulators, requiring a smaller heatsink or even no heatsink. The GM7130's perform well with standard inductors from several manufacturers, simplifying the design of switch-mode power supplies. The GM7130 series guarantee ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, with 50 µA (typical) standby current. The output switch has cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. 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 On-card/ board switching regulators High-efficiency step-down buck regulator Positive to negative converter (buck-boost) TYPICAL APPLICATIONS Feedback 4 GM7130-5.0 1 + CIN 100 µF Output 2 3 GND +5V Regulated Output 3A Load 100 µH L1 5 ON/ OFF Revision 1, Jun. 2004 +VIN + D1 1N5822 COUT 680 µF GM 431 www.gammamicro.com PRELIMINARY GM7130 7V - 40V Unregulated DC Input 1 GM7130 MARKING INFORMATION & PIN CONFIGURATIONS (Top View) TO-220-5 2 TO-220- 5B TO-263-5(D PAK) GM7130 GM7130 GM7130 V VAYWW VIN Output Ground VIN VVAYWW VVAYWW ON/OFF Feedback VIN Output Ground ON/OFF Feedback ON/OFF Feedback Output Ground 1 2 3 4 5 V V, VVV A Y WW = Output Voltage (33 = 3.3V, 120= 12V, A =A dj ) = Assembly Location =Year =Work Week ORDERING INFORMATION GM7130 Ordering Number 2 Output Voltage Package GM7130-ATB5T Adj TO-220-5 50 Units / Tube GM7130-ATB5BT Adj TO-220-5B 50 Units / Tube GM7130-ATA5R Adj TO-263-5 800 Units/ Tape & Reel GM7130-ATA5T Adj TO-263-5 50 Units / Tube GM7130-3.3TB5T 3.3 TO-220-5 50 Units / Tube GM7130-3.3TB5BT 3.3 TO-220-5B 50 Units / Tube GM7130-3.3TA5R 3.3 TO-263-5 800 Units/ Tape & Reel GM7130-3.3TA5T 3.3 TO-263-5 50 Units / Tube GM7130-5.0TB5T 5.0 TO-220-5 50 Units / Tube GM7130-5.0TB5BT 5.0 TO-220-5B 50 Units / Tube GM7130-5.0TA5R 5.0 TO-263-5 800 Units/ Tape & Reel GM7130-5.0TA5T 5.0 TO-263-5 50 Units / Tube GM7130-12TB5T 12 TO-220-5 50 Units / Tube GM7130-12TB5BT 12 TO-220-5B 50 Units / Tube GM7130-12TA5R 12 TO-263-5 800 Units/ Tape & Reel GM7130-12TA5T 12 TO-263-5 50 Units / Tube GM7130-15TB5T 15 TO-220-5 50 Units / Tube GM7130-15TB5BT 15 TO-220-5B 50 Units / Tube GM7130-15TA5R 15 TO-263-5 800 Units/ Tape & Reel GM7130-15TA5T 15 TO-263-5 50 Units / Tube * TB5B: Bent and Staggered Leads of TO-220 package ** For detail Ordering Number identification, please see last page. Shipping GM7130 ABSOLUTE MAXIMUM RATINGS Rating Value Unit Maximum Supply Voltage 45 V ON/OFF Pin Input Voltage -0.3 V VIN V -1.0 V Internally Limited - -65 to + 150 °C +150 °C Minimum ESD Rating (C=100pF, R=1.5kW) 2 kV Lead Temperature (Soldering, 10 seconds) +260 °C Value Unit Output Voltage to Ground (Steady State) Power Dissipation Storage Temperature Range Maximum Junction Temperature OPERATING RATINGS Rating -40 Operating Temperature Range Supply Voltage TJ 125 °C 40 V BLOCK DIAGRAM + CIN V IN Internal Regulator 1 ON/OFF 5 ON/OFF 4 Feedback R2 Fixed Gain Error AMP Comparator + 1.0K R1 - 3 AMP Switch + Driver - Output VOUT L1 2 D1 52kHz Oscillator Reset Thermal Shutdown Current Limit + C out 3 GND L O A D GM 431 1.23V Band-Gap Reference GM7130 Unregulated DC Input 3 GM7130 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) Conditions Symbol Min Typ Max Unit VIN = 12V, ILOAD = 0.5A VOUT 3.234 3.3 3.366 V VIN VOUT Parameter Output Voltage Output Voltage - GM7130 6V 40V, 0.5A ILOAD 3.0A h VIN = 12V, ILOAD = 3.0A Efficiency 3.168/ 3.135 3.3 3.432/ 3.465 - 75 - V % 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) Conditions Symbol Min Typ Max Unit VIN = 12V, ILOAD = 0.5A VOUT 4.900 5.0 5.100 V Parameter Output Voltage Output Voltage - GM7130 8V VIN 40V, 0.5A ILOAD 3.0A VIN = 12V, ILOAD = 3.0A Efficiency VOUT h 4.800/ 4.750 5.0 5.200/ 5.250 - 77 V - % 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 Symbol Min Typ Max Unit VIN = 25V, ILOAD = 0.5A VOUT 11.76 12.0 12.24 V VIN 40V, 0.5A ILOAD 3.0A VOUT VIN = 15V, ILOAD = 3.0A h 11.52/ 11.40 12.0 12.48/ 12.60 - 88 V - % 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) GM7130 Parameter 4 Output Voltage Output Voltage - GM7130 Efficiency Conditions Symbol Min Typ Max Unit VIN = 25V, ILOAD = 0.5A VOUT 14.70 15.0 15.30 V 18V VIN 40V, 0.5A ILOAD 3.0A VOUT VIN = 18V, ILOAD = 3.0A h 14.40/14.25 15.0 15.60/ 15.75 - 88 - V % GM7130 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) Conditions Symbol Min Typ Max Unit VIN = 12V, ILOAD = 0.5A, VOUT = 5V VOUT 1.217 1.230 1.243 V Parameter Feedback Voltage Feedback Voltage - GM7130 Efficiency 8V VIN 40V, 0.5A ILOAD 3.0A VOUT VOUT = 5V 1.193/1.180 1.230 1.267/1.280 - h VIN = 12V, ILOAD = 3A, VOUT=5V - 77 V % 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 Parameter Feedback Bias Current Oscillator Frequency Saturation Voltage Max Duty Cycle (ON) Current Limit Output Leakage Current Quiescent Current Standby Quiescent Current Thermal Resistance ON/OFF Pin Logic Input Level Conditions Symbol Min Typ Max Unit VOUT = 5V (Adjustable Version Only) Ib - 50 100 / 500 nA (Note 11) fo 47 / 42 52 58 / 63 kHz IOUT = 3A (Notes 4) VSAT - 1.4 1.8 / 2.0 V (Note 5) DC 93 98 - % (Note 4, 11) ICL 4.2 / 3.5 5.8 6.9 / 7.5 A IL - 7.5 2 30 mA IQ - 5 10 mA ISTBY - 50 200 µA TO-220 Package, Junction to Ambient (Note 8) qJA TO-220 Package, Junction to Ambient (Note 9) qJA TO-220,TO-263 Package, Junction to Case qJC qJA 65 45 2 50 -- °C/W TO-263 Package, Junction to Ambient (Note 10) - VOUT=0V VIH 2.2 / 2.4 1.4 - V VOUT = Nominal Output Voltage VIL - 1.2 1.0 / 0.8 V ON/OFF Pin = 5V (OFF) IIH - 12 30 µA ON/OFF Pin = 0V (ON) IIL - 0 10 µA (Notes 6, 7) Output = -1 V Output = -1V (Note 6) ON/OFF Pin = 5V (OFF) ON/OFF Pin Input Current GM 431 GM7130 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) 5 GM7130 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. GM7130 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 the GM7130 By lowering the minimum duty cycle from 5% down to approximately 2%. 6 GM7130 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 the GM7130, to keep the sensitive feedback wiring short. Figure 1(a). Fixed Output Voltage Versions Feedback 4 GM 7130- +VIN FIXED OUTPUT 1 L1 Output 2 GND 3 VIN Unregulated DC Input + VOUT 100 µH ON/OFF 5 + CIN 100 µF L O A D D1 COUT 680 µF 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 4 GM7130-ADJ 1 2 7V - 40V Unregulated DC Input L1 Output GND 3 VOUT=5.0V 100 µH ON/ OFF 5 + + CIN 100 µF D1 MBR360 VOUT = VREF ( 1 + COUT 680 µF R2 R1 L O A D R2 ) R1 where VREF = 1.23V, R1 between 1k and 5k. Figure 1(b). Adjustable Output Voltage Versions GM 431 VOUT R2 = R1 ( V -1) REF GM7130 +VIN 7 GM7130 Typical Performance Characteristics Figure 3. Current Limit Figure 2. Switch Saturation Voltage 1.6 6.5 VIN = 25V 1.2 OUTPUT CURRENT (A) SATURATION VOLTAGE (V) 1.4 -55°C 1.0 0.8 25°C 0.6 150 °C 0.4 6.0 5.5 5.0 4.5 0.2 4.0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 -75 -50 -25 SWITCH CURRENT (A) Figure 4. Dropout Voltage L1 = 150 µH 1.5 ILOAD = 1A 1.0 ILOAD = 200mA 0.5 25 50 VOUT = 5V Measured at Ground Pin TJ = 25° 18 16 14 12 10 ILOAD = 3A 8 6 RIND = 0.1W 0 4 75 100 125 150 ILOAD = 200mA 0 10 20 30 40 50 60 INPUT VOLTAGE (V) Figure 6. Standby Quiescent Current Figure 7. Minimum Operating Voltage 200 5.0 VIN = 40V Adjustable Version Only 4.5 4.0 150 INPUT VOLTAGE (V) SATURATION QUIESCENT CURRENT (µA) GM7130 JUNCTION TEMPERATURE (°C) 8 50 75 100 125 150 Figure 5. Quiescent Current ILOAD = 3A 0 -75 -50 -25 25 20 QUIESCENT CURRENT(mA) INPUT-OUTPUT DIFFERENTIAL (V) 2.0 0 JUNCTION TEMPERATURE (°C) V ON / OFF = 5V 100 50 3.0 2.5 2.0 1.5 1.0 VIN = 12V 0.5 0 -50 -25 0 25 50 75 100 JUNCTION TEMPERATURE (°C) 3.5 125 0 -50 VOUT 1.23V ILOAD = 500 mA -25 0 25 50 75 100 125 JUNCTION TEMPERATURE (°C) GM7130 Typical Performance Characteristics Figure 9. Feedback Voltage vs. Duty Cycle Figure 8. Quiescent Current vs. Duty Cycle 20.0 Adjustable Version Only FEEDBACK VOLTAGE CHANGE (mV) QUIESCENT CURRENT (mA) 20.0 17.5 VIN = 7V 15.0 12.5 VIN = 40V 10.0 7.5 5.0 2.5 ILOAD = 500mA 0 0 20 40 Adjustable Version Only ILOAD = 500mA 15.0 10.0 5.0 VIN = 40V 0 VIN = 7V -5.0 -10.0 -15.0 -20.0 60 80 100 0 DUTY CYCLE (%) 20 40 60 80 100 DUTY CYCLE (%) Figure 10. Maximum Power Dissipation(TO-263) Figure 11. Feedback Pin Current 100 qJA = 32°C/ W qJA = 37°C/ W 3 2 1 qJA = 50°C/ W qJA = 73°C/ W 0 0 10 20 30 40 50 60 70 80 90 100 AMBIENT TEMPERATURE (°C) 50 25 0 -25 -50 -75 -100 -75 -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (°C) GM7130 4 FEEDBACK PIN CURRENT (nA) POWER DISSIPATION (W) Adjustable Version Only 75 9 GM7130 Typical Performance Characteristics Figure 12. Switching Waveforms Figure 13. Load Transient Response Output Voltage Change 100mv/ div Inductor Current 1A/ div 3A Load Current 1kHz 10mA 1.5 2 2.5 15 68µH 0.4 0.5 0.6 0.70.8 1.0 1.5 µH H 00 0µ H 0µ 7 0.3 0.4 0.5 0.60.8 2.0 2.5 3.0 0µ H 0µ H 47 H µH 0µ H 0µ 47 1 1.2 1.5 2 MAXIMUM LOAD CURRENT(A) MAXIMUM LOAD CURRENT(A) Figure 14. GM7130 -3.3 Figure 15. GM7130 - 12 Figure 16. GM7130 -5.0 100 90 80 00 10 00 µH 68 70 0 0µ H 33 50 45 40 0µ H 22 35 0µ 1. Programming Output Voltage(Selecting R1 and R2, as shown in Figure 12. And Figure 13. H 15 H 0µ 0 10 µH Use the following formula to select the appropriate resistor values. 68 30 25 20 0.3 2.5 3 VOUT = Regulated Output Voltage VIN(Max) = Maximum Input Voltage ILOAD(Max) = Maximum Load Current F = Switching Frequency (Fixed at 52 kHz) µH 47 60 µH PROCEDURE(Adjustable Output Voltage Versions) Given: µH µH 15 0.4 0.5 0.6 0.7 0.8 1.0 1.5 2..0 2.5 3.0 VOUT = VREF ( 1+ Figure 17. GM7130 - ADJ VOUT 1,000 E • T = (VIN - VOUT) • VIN F(in kHz) R2 ) R1 where VREF = 1.23V R1 can be between 1k and 5k. (For best temperature coefficient and stability with time, use 1% metal film resistors) MAXIMUM LOAD CURRENT(A) GM7130 8 MAXIMUM LOAD CURRENT(A) 150 10 10 9 68 100µH 12 10 150µH 16 15 22 220µH 10 µH 18 20 68 µH 00 00 330µH 20 14 0.3 3 470µH 15 µH 68 1 680µH 33 H 0µ 10 5 0.3 0.4 0.5 0.6 0.8 H MAXIMUM INPUT VOLTAGE(V) H 15 0µ H 0µ µ 47 6 25 40 10 H 0µ 22 7 40 35 30 15 H 8 MAXIMUM INPUT VOLTAGE(V) MAXIMUM INPUT VOLTAGE(V) H 0µ 68 33 10 0µ 40 20 15 47 MAXIMUM INPUT VOLTAGE(V) Input : 12V Output : 5V @3A R2 = R1 ( VOUT -1) VREF 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 V 10V R2 = R1( OUT -1) = 1k ( -1) 1.23V VREF R2 = 1k (8.13 - 1) = 7.13k, closest 1% value is 7.15k GM7130 Inductor Selection by Manufacturer's Part Numbe. Inductor Value 3L Electronic Corp. 47µH TC-470M-3A-5026 68µH TC-680M-3A-5026 100µH TC-101M-3A-5026 150µH TC-151M-3A-8026 220µH TC-221M-3A-8026 330µH TC-331M-3A-8026 470µH TC-471M-3A-8026 680µH TC-681M-3A-8026 1000µH TC-102M-3A-9426 1500µH TC-152M-3A-9426 3L Electronic Corp., + 886(2) 86659999 Website : www.3lcoil.com.tw Capacitor Selection by Manufacturer's Part Number Capacitor Value Nippon ChemiI - Con Corp. 100µF KY50VB100-MH11 220µF KY50VB220-MJ16 470µF 680µF KY50VB470-MJ30 KY50VB680-MK30 1000µF KY50VB1000-ML25 GM7130 Nippon Chemi-Con Corp. , + 81(3)54367628 Website : www.chemi-con.co.jp 11 GM7130 TO-220-5 PACKAGE OUTLINE DIMENSIONS 9.97 ± 0.20 4.50 ± 0.20 9.90 ± 0.20 3.60 ± 0.20 8.0 ± 0.20 8.70 2.80 ± 0.10 7.0 +0.1 1.30 -0.05 3.70 ± 0.20 4.60 28.78 MAX 8.40 P 3° 15.90 ± 0.20 1.50 DP0.20 9.20 ± 0.20 1.30 ± 0.10 1.70 1.2 3° 7.0 ± 0.20 9.20 ± 0.20 3° 13.08 ± 0.20 3-R0.2 5-0.8 ± 0.10 +0.1 0.50 -0.05 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 4.50 1.30 15° 0.40 1.20 3° 4.60 1.50 DP0.20 9.20 Pad Layout 1.20 4.90 GM7130 1.70 TYP (1.70 ± 0.20) 0.80 0.40 3° 2.00 17.5 9 2.40 R0.30 0.75 R0.30 3.8 1.7 2.54 0.50 11.5 P 0.10 15.3 10.0 8.0 7.0 4.40 1.07 1.75 3° 3° R 0.3 0.90 R 0.45 7.2 Units: mm 9.20 15.30 10.00 12 4.90 Unit: mm GM7130 TO-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 0.74 ± 0.15 0.05 ± 0.005 1.27 ± 0.1 0.151 ± 0.002 3.84 ± 0.05 C 0.4985 ± 0.0075 12.66 ± 0.2 0.032 ± 0.004 0.81 ± 0.1 0.05 ± 0.005 1.27 ± 0.1 0.965 ± 0.008 24.5 ± 0.2 0.138 ± 0.004 3.5 ± 0.1 0.220 1.700 0.996 ± 0.008 25.3± 0.2 0.105 ± 0.006 2.76± 0.17 0.153 ± 0.0035 3.9 ± 0.1 0.213 ± 0.004 5.4 ± 0.1 0.358 ± 0.008 9.1± 0.2 0.173 ± 0.006 4.4 ± 0.15 0.331 ± 0.006 0.017 ± 0.005 0.42 ± 0.11 8.4 ± 0.15 0.268 ± 0.004 0.68 ± 0.1 ( Inches ) mm ORDERING NUMBER GM 7130 A TB5 T Shipping R: Tape & Reel T: Tube Gamma Micro. 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 Circuit Type 13