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IL317
THREE-TERMINAL ADJUSTABLE OUTPUT POSITIVE VOLTAGE REGULATORS
The IL317 is adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5 A over an TO-220 AB output voltage range of 1.2 V to 37 V. These voltage regulator is exceptionally easy to use and require only two external resistors to set the output voltage. Further, it employ internal current limiting, thermal shutdown and safe area compensation, making Pin 1. Ajust (H eatsink 2. Vout them essentially blow-out proof. surface connected 3. Vin to Pin 2.) The IL317 serve a wide variety of applications to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the IL317 series can be used as a precision current requlator.
Standard application
* Output Current in Excess of 1.5 Ampere * Output Adjustable between 1.2 V and 37 V * Internal Thermal Overload Protection * Internal Short - Circuit Current Limiting Constant with Temperature * Output Transistor Safe-Area Compensation * Floating Operation for High Voltage Applications * Standard 3-lead Transistor Packages * Eliminates Stocking Many Fixed
Vin
I L 317
R1 Adjust R2
Vout
N in* 0.1F
No** 1F
= Cin is required if regulator is located an appreciable distance from power supply filter. = Co is not needed for stability ; however, is does improve transient response.
Vout = 125V (1 + .
R2 R2 )+ R1 I ADJ
Since I AD J is controlled to less then 100 A, the error associated with this term is negligible in most applications.
Maximum ratings Rating Input - Output Voltage Differential Power Dissipation and Thermal Characteristics Operating Junction Temperature Rang Storage Junction Temperature Rang Symbol Vi - Vo PD TJ Tstg Value 40 Internally Limited -0 to +150 -65 to +150 Unit Vdc C C
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IL317
Electrical characteristics (Vi-Vo= 5.0V, Io = 0.5 A, TJ = Tlow to Thigh (see Note 1); Imax = 1.5 A and Pmax = 20 W unless otherwise noted) Characteristic Symbol Min Typ Max Unit Regline 0.01 0.04 %/V Line Regulation (TA=+25C) 3.0V Vi - Vo 40 V Regload Load Regulation(TJ=+25C) 10mAIoImax, 5.0 25 mV Vin 5V 0.1 0.5 %/Vo Vin5 V 0.03 0.07 Thermal Regulation (TA=+25C) %/W 20 ms Pulse Adjustment Pin Current IAdj 50 100 A Adjustment Pin Current Change 0.2 5.0 IAdj A 2.5 Vi - Vo 40 V 10mA IL Imax, PD Pmax Vref 1.2 1.25 1.3 V Reference Voltage (Note 4) 3.0 Vi - Vo 40 V 10mA IL Imax, PD Pmax Line Regulation (Note 3) Regline 0.02 0.07 %/V 3.0 V Vi - Vo 40 V Regload Load Regulation (Note 3) 10mAIoImax, 20 70 %/V Vin 5V 0.3 1.5 %/V Vin5 V Ts 0.7 Temperature Stability (Tlow Tj Ttigh) Minimum Load Current to ILmin 3.5 10 mA Maintain Regulation (Vi - Vo = 40 V) Imax A Maximum Output Current 1.5 2.2 Vi - Vo 15 V , P 20 W 0.15 0.4 Vi - Vo = 40 V, P 20W, TA=+25C RMS Nose , % of Vo N 0.003 %/Vo TA=+25C, 10 Hz f 10 kHz Ripple Rejection, Vo = 10 V, f = 120 Hz RR dB (Note 5) Without Cadj 65 66 80 Cadj = 10 F Long-Term Stability, Tj = Thigh (Note 6) S 0.3 1.0 %/1.0 k TA=+25C for Endpoint Measurements Hrs. Thermal Resistance Junction to Case 5.0 RJC C/W Notes: (1) Tlow = 0 C , Thigh = +125 C (2) Imax = 0.5 A , Pmax (3) Load and line regulation are specified at constant junction tempereture. Changes in Vo due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. (4) Selected devices with tightened tolerance reference voltage available. (5) Cadj , when used, connected between the adjustment pin and ground. (6) Since Long - Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot.
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