GM317L GAMMA | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 7
Technical content
Features
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 Voltage Regulators Power Supplies Current Regulators Switching Regulators Current Limiter Constant Current Battery Charger Current Limited Charger Typical Application Circuit L
2 GM317LV2.01 GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Marking Information and Pin Configurations (Top View) TO 92 SO 8 G: Green Product A: Assembly / Test site code Y: Year WW: Week
Ordering Information
Ordering Number VOUT Package Shipping GM317LT92BG TO 92 1,000 Units/ESD Bag GM317LT92RLG TO 92 2,000 Units/Ammo Pack (Tape) GM317LS8RG Adj SO 8 2500 Units / Reel 317LG AYWW VOUT
3 VIN Adj 1
- VIN 2. VOUT 8. NC 7. VOUT 4. Adj 5. NC 6. VOUT GM317LG VAYWW 3. VOUT
GM317LV2.01 Absolute Maximum Ratings PARAMETER RATINGS UNITS Input Voltage, VI 41 V Input to Output Differential Voltage, VI – VO 40 V Operating Junction Temperature T J 0 to 125 °C Storage Temperature T stg - 60 to 150 °C Lead Temperature 1.6mm (1/6 inch) from case for 10 seconds 260 °C Recommended Operating Conditions PARAMETER Min Max Unit Output Current, IO 10 100 mA Operating Virtual Junction Temperature, TJ 0 125 °C Block Diagram R20 300K Q21 Q20A Q20B Q20C Q20D Q20E 20pF 500 200 Q22 Q23 3.7K Q24 Q25 R18 30K R22 1.0K Q5 Q6 30pF 15pF Q9 Q10 2.4K 12K R23 ADJ R27 Q26 R24 Q12 Q14 R25 4.7K pF 300 6.57K 300 370 Q11A Q11B Q14B R19 12K Q15 Q17 Q16 Q18 6.2V Q19 6.2VR11 R28
10 R26
0.3 R15
0.3 IN OUT
4 GM317LV2.01 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 Symbol Test Condition Min Typ Max Unit 3V ≤ VIN – VOUT ≤ 40V, TA = 25°C 0.01 0.04 Line Regulation (note 2) ΔVOI 3V ≤ VIN – VOUT ≤ 40V, 0.02 0.07 %/V VO ≤ 5V 5 25 mV 10mA ≤ IOUT ≤ 100mA, TA = 25°C VO > 5V 0.1 0.5 %/ VO VO ≤ 5V 20 70 mV Load regulation ΔVOL 10mA ≤ IOUT ≤ 100mA VO > 5V 0.3 1.5 %/ VO Adjustment Pin Current IADJ 50 100 µA Adjustment Pin Current Change ΔIADJ 3V ≤ VIN – VOUT ≤ 40V 10mA ≤ IOUT ≤ 100mA 0.2 5.0 µA Reference Voltage 3V ≤ VIN – VOUT ≤ 40V, 10mA ≤ IOUT ≤ 100mA, 1.2 1.25 1.3 V Minimum Load Current VIN – VOUT ≤ 40V 3.5 10 mA VIN – VOUT ≤ 40V, TA = 25°C 25 50 Maximum Output Current IO(MAX) VIN – VOUT ≤ 15V 100 200 mA VOUT = 10V, f = 120Hz 65 Ripple Rejection Ratio VOUT = 10V, f = 120Hz, 10μF capacitor between ADJ and GND 66 80 dB Long Term Stability (Note 3) T A = 125 O C, 1000hr 0.3 % Output Noise Voltage 10Hz ≤ f ≤ 10KHz, TA = 25°C 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. 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.
GM317LV2.01 VIN VOUT VREF IPROG IADJ GM317L Adjust VREF = 1.25V typical Basic Circuit Configuration VIN VOUT GM317L Adjust 1N4002 1N4002 CO CADJ CIN
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: 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 progra mming resistor R1 should be connected as close to the regulator as possible to minimize line drops which effe ctively appear in series wi th the reference, thereby degrading regulation. The ground end of R2 can be returned near the load ground to provide re mote 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 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. 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. VOUT = VREF (1 + R1 ) + IADJ R2 R2
6 GM317LV2.01 GM317L 3-TERMINAL 100mA ADJUSTABLE REGULATOR Package Outline Dimensions – TO 92 2.10 - 2.27 4.7 - 5.2 0.4 - 0.55 Typ. 3.85 - 4.19 12.7 - 14.2 1.22 - 1.32 4.9 - 5.2 Package Outline Dimensions – SO 8 (0.356 - 0.508) (0.406 - 0.270) 0.016 - 0.050 D 0.189 - 0.197 (4.800 - 5.004) SEATING PLAN 0.014 - 0.020 0.150 - 0.157 (3.810 - 3.988) 0.008 - 0.010 (0.203 - 0.254) 8.0 MAX 0.053 - 0.059 (1.346 - 1.753) 0.004 - 0.010 0.228 - 0.244 (5.791 - 6.198) 0.050 (1.270) TYP (0.012 - 0.254) Dimensions are in millimeters
GM317LV2.01 6 8 10 Ordering Number GM 317L T92 B G Package Type Shipping Type APM Gamma Micro Circuit Type T92: TO92 S8: SO8 B: Bag RL: Ammo Pack (Tape) T: Tube R: Tape & Reel G:Green Note: Pb-free products: ♦ RoHS compliant and compatible with the cu rrent 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)