GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Description Features The GM317L is an adjustable 3-terminal positive voltage regulator capable of supplying 100mA over an output voltage range of 1.2 V to 37 V. This voltage regulator is 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 compensation, making it essentially blow out proof. GM317L offers full overload protection. Included on the chip current limit, thermal overload protection, and safe-area protection. Normally, no capacitors is needed unless the device is situated far from the input filter capacitors in which case an input bypass is needed. An optional output capacitor can added to improve transient response. Output current up to 100mA Output Voltages 1.2V to 37V Internal thermal overload protection Internal short circuit current limiting Output transistor safe area compensation Floating operation for high voltage applications Available in TO-92 and SO8 packages Applications Voltage Regulators Power Supplies Current Regulators Switching Regulators Current Limiter Constant Current Battery Charger Current Limited Charger Typical Application Circuit VIN L VIN GM317L VOUT ADJ CIN* 0.1µF IADJ VOUT R1 240Ω CO** 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. GM317LV2.01 R2 1 GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Marking Information and Pin Configurations (Top View) TO 92 SO 8 1. VIN 2. VOUT 3. VOUT Adj 1 2 4. Adj 3 VIN GM317LG VAYWW 317LG AYWW 8. NC 7. VOUT 6. VOUT 5. NC VOUT G: Green Product A: Assembly / Test site code Y: Year WW: Week Ordering Information Ordering Number VOUT GM317LT92BG GM317LT92RLG GM317LV2.01 GM317LS8RG 2 Adj Package Shipping TO 92 1,000 Units/ESD Bag TO 92 SO 8 2,000 Units/Ammo Pack (Tape) 2500 Units / Reel GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Absolute Maximum Ratings PARAMETER RATINGS UNITS Input Voltage, VI 41 V Input to Output Differential Voltage, VI – VO 40 V Operating Junction Temperature TJ 0 to 125 °C Storage Temperature Tstg - 60 to 150 °C 260 °C Lead Temperature 1.6mm (1/6 inch) from case for 10 seconds Recommended Operating Conditions PARAMETER Min Max Unit Output Current, IO 10 100 mA Operating Virtual Junction Temperature, TJ 0 125 °C Block Diagram IN Q14 Q20A Q20B Q20C Q20D Q17 Q14B Q20E R9 300 R3 3.7K Q1 Q2 Q5 R22 1.0K Q6 R25 4.7K Q26 Q3 Q24 Q21 Q22 R1 200 C3 20pF R2 500 Q8 Q23 Q4 C1 30pF C2 15pF R24 5K Q16 R7 6.57K C5 6pF Q7 Q12 R27 2K Q25 R18 30K Q18 6.2V Q15 R8 300 R19 12K Q11A R6 370 Q11B R21 8K R10 600 R11 60 R28 10 R12 0.3 R26 0.3 Q19 6.2V R15 60K OUT Q9 Q10 R4 2.4K R5 12K R23 60 ADJ GM317LV2.01 R20 300K 3 GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Electrical Characteristics (Unless otherwise noted, VI - VO = 5V and IO= 40mA. TJ = 0°C to 125°C, unless otherwise noted) Parameter Line Regulation (note 2) Symbol ΔVOI Test Condition Typ Max 3V ≤ VIN – VOUT ≤ 40V, TA = 25°C 0.01 0.04 3V ≤ VIN – VOUT ≤ 40V, 0.02 0.07 VO ≤ 5V 5 25 mV VO > 5V 0.1 0.5 %/ VO VO ≤ 5V 20 70 mV VO > 5V 0.3 1.5 %/ VO 50 100 µA 0.2 5.0 µA 1.25 1.3 V 3.5 10 mA 10mA ≤ IOUT ≤ 100mA, TA = 25°C Load regulation ΔVOL 10mA ≤ IOUT ≤ 100mA Adjustment Pin Current Adjustment Pin Current Change IADJ ΔIADJ 3V ≤ VIN – VOUT ≤ 40V 10mA ≤ IOUT ≤ 100mA Reference Voltage 3V ≤ VIN – VOUT ≤ 40V, 10mA ≤ IOUT ≤ 100mA, Minimum Load Current VIN – VOUT ≤ 40V Maximum Output Current Min IO(MAX) 1.2 VIN – VOUT ≤ 40V, TA = 25°C 25 50 VIN – VOUT ≤ 15V 100 200 VOUT = 10V, f = 120Hz Ripple Rejection Ratio VOUT = 10V, f = 120Hz, 10μF capacitor between ADJ and GND Long Term Stability (Note 3) TA = 125 OC, 1000hr Output Noise Voltage 10Hz ≤ f ≤ 10KHz, TA = 25°C Unit %/V mA 65 66 80 dB 0.3 % 0.003 % 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. GM317LV2.01 Note 3: 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 GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Application Information Basic Circuit Operation The GM317L is a 3- terminal floating regulator. In operation, tit develops and maintains a nominal 1.25V reference (VREF) between its output and adjustment terminal. This reference voltage is converted to a programming current flow through R2 to ground. The regulated output voltage is given by: VOUT VIN GM317L VREF Adjust R2 VOUT = VREF (1 + R1 ) + IADJ R2 R1 IPROG IADJ R2 VREF = 1.25V typical Basic Circuit Configuration Since the current from the adjustment terminal (IADJ) represents an error term in the equation, the GM317Lwas designed to minimize IADJ and make it very constant with line and load changes. To do this, all quiescent operating current is returned to the output establishing a minimum load current requirement. If there is insufficient load on the output, the output will rise. Since the GM317L is a floating regulator, it is only the voltage differential across the circuit which is important to performance, and operation at high voltages with respect to ground is possible. Load Regulation The GM317L is capable of providing extremely good load regulation, but a few precautions are needed to obtain maximum performance. For best performance, the programming resistor R1 should be connected as close to the regulator as possible to minimize line drops which effectively appear in series with the reference, thereby degrading regulation. The ground end of R2 can be returned near the load ground to provide remote ground sensing and improve load regulation. External Capacitors A 0.1µF disc or 1.0µF tantalum input bypass capacitor CIN is recommended to reduce the sensitivity to input line impedance. The adjustment terminal may be bypassed to ground to improve ripple rejection. This capacitor CADJ prevents ripple from being amplified as the output voltage is increased. A 10µF capacitor should improve ripple rejection about 15 dB at 120Hz in a 10V application. Although the GM317L is stable with no output capacitance, like any feedback circuit, certain values of external capacitance can cause excessive ringing. An output capacitance CO in the form of a 1.0µF tantalum or 25µF aluminum electrolytic capacitor on the output swamps this effect and insures stability. Protection Diodes The figure below shows the GM317L with the recommended protection diodes for output for output voltage in excess of 25V or high capacitance values (CO > 25µF, CADJ > 10µF). Diode D1 prevents CO from discharging thru the IC during an input short circuit. Diode D2 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 1N4002 VOUT VIN GM317L R1 CIN CO D2 1N4002 Adjust R2 CADJ GM317LV2.01 When external capacitors are used with any IC regulator, it is sometimes necessary to add protection diodes to prevent the capacitors from discharging through low current points into the regulator. 5 GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Package Outline Dimensions – TO 92 3.85 - 4.19 4.7 - 5.2 4.9 - 5.2 12.7 - 14.2 0.4 - 0.55 Typ. 1.22 - 1.32 2.10 - 2.27 Dimensions are in millimeters Package Outline Dimensions – SO 8 0.189 - 0.197 (4.800 - 5.004) 0.228 - 0.244 (5.791 - 6.198) 0.016 - 0.050 (0.406 - 0.270) D 0.014 - 0.020 (0.356 - 0.508) 0.050 (1.270) TYP 0.150 - 0.157 (3.810 - 3.988) GM317LV2.01 0.053 - 0.059 (1.346 - 1.753) 6 SEATING PLAN 0.004 - 0.010 (0.012 - 0.254) 0.008 - 0.010 (0.203 - 0.254) 8.0 MAX GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Ordering Number GM 317L APM Circuit Type Gamma Micro T92 B Package Type Shipping Type T92: TO92 S8: SO8 B: Bag RL: Ammo Pack (Tape) T: Tube R: Tape & Reel G G:Green Note: Pb-free products: ♦ RoHS compliant and compatible with the current require-ments of IPC/JEDEC J-STD-020. ♦ Suitable for use in Pb-free soldering processes with 100% matte tin (Sn) plating. Green products: Lead-free (RoHS compliant) ♦ Halogen free(Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight) GM317LV2.01 ♦ 8 10 6 7