A Power Management GM317 A MICROELECTRONICS 3- TERMINAL ADJUSTABLE REGULATOR Features Description Output current up to 1.5A The GM317 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5 A over an out- Output Voltages 1.2V to 37V Input Regulation typ. 0.01% per input put voltage range of 1.2 V to 37 V. This voltage regulator is Output Regulation typ. 0.1% exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compen- Peak Output Current Constant over Temperature Range of Regulator Available in TO-220 and TO-263 Packages sation, making it essentially blow-out proof. Ripple Rejection Typically 80dB Direct replacements for LM317 The GM317 a wide variety of applications including local, application, and on card regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output. The GM317 can be used as a precise current regulator. TYPICAL APPLICATION VIN GM317 VOUT VIN ADJ CIN* 0.1µF IADJ VOUT R1 240W + C ** O 1µF * CIN is required if regulator is located an appreciable distance from power supply filter. **CO is not needed for stability, however, it improve transient response. VOUT= 1.25V (1+ R2 ) + IADJR2 R1 Since IADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications. www.gammamicro.com PRELIMINARY GM317 V0.1 R2 1 A Power Management GM317 A MICROELECTRONICS 3- TERMINAL ADJUSTABLE REGULATOR MARKING INFORMATION & PIN CONFIGURATIONS 2 TO-220 TO-263-2 (D PAK) GM317 GM317 AYWW AYWW ADJ INPUT OUTPUT INPUT ADJ OUTPUT A : Assembly Location Y : Year W W : weekly ORDERING INFORMATION Ordering Number Package GM317TA3T TO-263 50 Units / Tube GM317TA3R TO-263 800 Units / Tape & Reel GM317TB3T TO-220 50 Units / Tube GM317 * For detail Ordering Number identification, please see last page. 2 Shipping A Power Management GM317 A MICROELECTRONICS 3- TERMINAL ADJUSTABLE REGULATOR ABSOLUTE MAXIMUM RATINGS VALUE UNIT Input to Output Differential Voltage, VI - VO 40 V Continuous Total Dissipation at 25°C free-air temperature 2 Continuous Total Dissipation at (or bellow) 25°C case temperature 15 PARAMETER W Operating free-air, case, or virtual junction Temperature Range 0 to +125 Storage Temperature Range -65 to +150 Lead Temperature 1.6mm (1/16 inch) from case for 10 sec. °C 260 RECOMMENDED OPERATING CONDITIONS MIN MAX UNIT Output Current, IO 10 1500 mA Operating virtual junction temperature, TJ 0 125 °C PARAMETER SCHEMATIC DIAGRAM VIN 230 120 5.6K 6.3V 13K 170 125K 12.4K 6.7K 5pF 135 510 6.8K 5.1K 30 pF 5.8K 6.3V 190 110 30 pF 2.4K 12K 6.3V 160 200 105 4.0 12.5K 3.6K VOUT ADJ This device contains 29 active transistors. GM317 310 31 3 A Power Management GM317 A MICROELECTRONICS 3- TERMINAL ADJUSTABLE REGULATOR ELECTRICAL CHARACTERISTICS over recommended ranges of operating virtual junction temperature, unless otherwise noted. PARAMETER TEST CONDITIONS* Input Regulation (Note 2) VI - VO= 3V to 40V TJ= MIN to MAX (Note 3) IO= 10mA to 1.5A Min Output Regulation Max 0.01 0.04 0.02 0.07 65 VO= 10V, f= 120H, 10µF capacitor between ADJ and ground IO= 10mA to 1.5A TJ= 25°C (Note 3) VO IO= 10mA to 1.5A (Note 3) dB 66 5V 80 5 25 mV VO >5V 0.1 0.5 % VO 5V 20 70 mV VO >5V 0.3 1.5 % Output Voltage Change with Temperature TJ= MIN to MAX After 1000h at TJ= MAX and VI - VO= 40V 0.3 Output Noise Voltage f= 10Hz to 10kHz, TJ= 25°C 0.003 Minimum Output Current to maintain Regulation VI - VO= 40V Reference Voltage (Output to ADJ) VI - VO= 3V to 40V, IO= 10mA to 1.5A, P Peak Output Current 15W 1 % % 3.5 10 mA 50 100 µA 0.2 5.0 µA 1.2 1.25 1.3 V Adjustment-Termainal Current VI - VO= 2.5V to 40V, IO= 10mA to 1.5A % 1 Output Voltage Long-Term Drift (Note 4) Adjustment-Termainal Current Change Unit %/ V VO= 10V, f= 120H Ripple Rejection Typ VI - VO 15V 1.5 2.2 VI - VO 40V, TJ= 25°C 0.15 0.4 A * Unless otherwise noted, these specifications apply for the following test conditions: VI - VO = 5V and IO= 0.5A. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. GM317 Note 1: All characteristics are measured with a 0.1µF capacitor across the input and a 1µF capacitor across the output. Note 2: Input regulation is expressed here as the percentage change in output voltage per 1V change at the input. Note 3: Pulse testing techniques are used to mantain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. Note 4: Since long-term drift cannot be measured on the individual devices prior to shipment, this specification is not intended to be a guarantee or warranty. It is an engineering estimate of the average drift to be expected from lot to lot. 4 A Power Management GM317 A MICROELECTRONICS 3- TERMINAL ADJUSTABLE REGULATOR Typical Performance Characteristics 100 90 IL= 0.5A 0 -0.2 IL= 1.5A -0.4 -0.6 -0.8 -1.0 VIN= 15V VOUT= 10V -50 -25 Adjustment Pin Current (µA) 0.2 IOUT, Output Current (A) 3.0 TJ= 25°C 2.0 150°C -55°C 1.0 80 70 60 50 40 30 20 10 0 0 0 0 25 50 75 100 125 150 0 TJ, Junction Temperature (°C) Figure 1. Load Regulation 10 20 30 VIN - VOUT, Input - Output Voltage Differential(Vdc) 40 2.5 1.0A 2.0 500mA 1.5 200mA 20mA TJ, Junction Temperature (°C) Figure 4. Dropout Voltage RR, Ripple Rejection (dB) 80 60 3.5 3.0 25°C 2.5 150°C 2.0 1.5 1.0 125 CADJ= 10µA Without CADJ 60 40 VIN - VOUT= 5V 20 IL= 500mA f= 120Hz TJ= 25°C 0 0 -50 -25 0 25 50 75 100 125 150 100 80 0.5 1.0 100 TJ= -55°C 4.0 RR, Ripple Rejection (dB) IL= 1.5A 72 100 4.5 IB, Quiescent Current (mA) VIN - VOUT, Input - Output Voltage Differential (Vdc) 5.0 DVOUT= 100mV 50 Figure 3. Adjustment Pin Current vs. Temperature Figure 2. Current Limit 3.0 25 Ambient Temperature (°C) 0 10 20 30 40 VIN - VOUT, Input - Output Voltage Differential (Vdc) Figure 5. Minimum Operating Current 0 5.0 10 15 20 25 30 35 40 VOUT, Output Voltage (V) Figure 6. Ripple Rejection versus Output Voltage IL= 500mA VIN= 15V VOUT= 10V TJ= 25°C 40 20 0 10 CADJ= 10µF Without CADJ 100 1.0k 10k 100k 1.0M 10M f, Frequency (Hz) Figure 7. Ripple Rejection Versus Frequency GM317 DVOUT, Output Voltage Change (%) 4.0 0.4 5 A Power Management GM317 A MICROELECTRONICS 3- TERMINAL ADJUSTABLE REGULATOR APPLICATION INFORMATION Basic Circuit Operation The GM317 is a 3- terminal floating regulator. In opera- External Capacitors A 0.1µF disc or 1.0µF tantalum input bypass capaci- tion, the GM317 develops and maintains a nominal tor (CIN) is recommended to reduce the sensitivity to 1.25V reference (Vref) between its output and adjust- input line impedance. ment terminals. This reference voltage is converted to a programming current flows through R2 to ground. The adjustment terminal may be bypassed to ground to improve ripple rejection. This capacitor The regulated output voltage is given by: (CADJ) prevents ripple from being amplified as the R2 VOUT= Vref (1+ ) + IADJ R2 R1 output voltage is increased. A 10µF capacitor should Since the current from the adjustment terminal (IADJ) improve ripple rejection about 15 dB at 120Hz in a 10V application. represents an error term in the equation, the GM317 was designed to control IADJ to less than 100µA and keep it constant. To do this, all quiescent operating current is returned to the output terminal. This imposes Although the GM317 is stable with no output capacitance, like any feedback circuit, certain values of external capacitance can cause excessive ringing. An the requirement for a minimum load current. If the load output capacitance (CO) in the form of a 1.0µF tanta- current is less than this minimum, the output voltage lum or 25µF aluminum electrolytic capacitor on the will rise. output swamps this effect and insures stability. Since the GM317 is a floating regulator, it is only the Protection Diodes When external capacitors are used with any IC regu- voltage differential across the circuit which is important to performance, and operation at high voltages with respect to ground is possible. VIN GM317 lator it is sometimes necessary to add protection diodes to prevent the capacitors from discharging through low current points into the regulator. VOUT VOUT Figure 9. shows the GM317 with the recommended protection diodes for output for output voltage in ex- Vref Adjust R1 IPROG IADJ cess of 25Vor high capacitance values (CO > 25µF, CADJ > 10µF). Diode D1 prevents CO from discharging thru the IC during an input short circuit. Diode D2 R2 VOUT Vref= 1.25V Typical Figure 8. Basic Circuit Configuration Load Regulation The GM317 is capable of providing extremely good protects against capacitor CADJ discharging through the IC during an output short circuit. The combination of diodes D1 and D2 prevents CADJ from discharging through the IC during an input short circuit. D1 load regulation, but a few precautions are needed to ob- GM317 tain maximum performance. For best performance, the programming resistor (R1) should be connected as 1N4002 VIN GM317 close to the regulator as possible to minimize line R1 drops which effectively appear in series with the reference, thereby degrading regulation. The groung end of R2 can be returned near the load ground to provide remote ground sensing and improve load regulation. VOUT CIN Adjust R2 D2 + C O 1N4002 CADJ 6 Figure 9. Voltage Regulator with Protection Diodes A Power Management GM317 A MICROELECTRONICS 3- TERMINAL ADJUSTABLE REGULATOR TO-263-2 PACKAGE OUTLINE DIMENSIONS 9.90 ± 0.20 4.50 ± 0.20 +0.1 1.30 -0.05 15° 0.40 1.20 Pad Layout 3° 1.50 DP0.20 0.63 17.02 0.33 8.38 9.20 ± 0.20 15.3 ± 0.20 0.10 ± 0.01 P 3° 3° 1.4 ± 0.20 R0.30 2.40 ± 0.20 2.00 ± 0.10 4.90 ± 0.20 0.90 ± 0.10 1.27 ± 0.10 2.54 TYP (2.54 ± 0.20) 0.42 10.66 0.24 6.096 2.54 ± 0.10 0.75 R0.30 +0.1 0.50 -0.05 0.04 1.016 10.0 ± 0.20 7.0 4.0 0.40 3° ( 0.90 3° R 0.3 0.12 3.05 R 0.45 Inches ) mm 7.2 9.20 ± 0.20 10.00 ± 0.20 4.90 ± 0.20 Unit: mm TO-220-3 PACKAGE OUTLINE DIMENSIONS 4.50 ± 0.20 9.90 ± 0.20 3.60 ± 0.20 8.0 8.70 2.80 ± 0.10 7.0 +0.1 1.30 -0.05 8.40 P 3° 45° 3.00 1.27 ± 0.10 10.08 ± 0.30 13.08 ± 0.20 1.46 1.00 2.54 TYP (2.54 ± 0.20) 3° 3° 0.80 ± 0.10 1.52 ± 0.10 0.9 7.0 3° 3-R0.2 GM317 4.60 18.95 MAX 3.70 ± 0.20 15.90 ± 0.20 1.50 DP0.20 9.20 ± 0.20 1.30 ± 0.10 1.70 +0.1 0.50 -0.05 2.40 ± 0.20 3° 2 - R 0.3 7 Unit: mm 10.00 ± 0.20 A A MICROELECTRONICS Power Management GM317 3- TERMINAL ADJUSTABLE REGULATOR ORDERING NUMBER GM 317 TA3 T Shipping R: Tape & Reel T: Tube Gamma Micro. Circuit Type GM317 Package TA3: TO-263 TB3: TO-220 8