TL317

3-TERMINAL ADJUSTABLE REGULATORS

SLVS004C – APRIL 1979 – REVISED JULY 1999

1

POST OFFICE BOX 655303

1.2 V to 32 V When Used With an External

Resistor Divider

Input-Voltage Change

description

The TL317 is an adjustable three-terminal

positive-voltage regulator capable of supplying

100 mA over an output-voltage range of 1.2 V to

32 V. It is exceptionally easy to use and requires

only two external resistors to set the output

voltage.

In addition to higher performance than fixed

regulators, this regulator offers full overload

protection available only in integrated circuits. Included on the chip are current-limiting and thermal-overload

protection. All overload-protection circuitry remains fully functional, even when ADJUSTMENT is disconnected.

Normally, no capacitors are 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 be added to improve transient response.

ADJUSTMENT can be bypassed to achieve very high ripple rejection, which is difficult to achieve with standard

three-terminal regulators.

In addition to replacing fixed regulators, the TL317 regulator is useful in a wide variety of other applications.

Since the regulator is floating and sees only the input-to-output differential voltage, supplies of several hundred

volts can be regulated as long as the maximum input-to-output differential is not exceeded. Its primary

application is that of a programmable output regulator, but by connecting a fixed resistor between

ADJUSTMENT and OUTPUT, this device can be used as a precision current regulator. Supplies with electronic

shutdown can be achieved by clamping ADJUSTMENT to ground, programming the output to 1.2 V, where most

loads draw little current.

The TL317C is characterized for operation over the virtual junction temperature range of 0

°C to 125°C.

AVAILABLE OPTIONS

PACKAGED DEVICES

CHIP

TJ

SMALL

OUTLINE

(D)

PLASTIC

(LP)

CHIP

FORM

(Y)

0

°C to 125°C

TL317CD

TL317CLP

TL317Y

The D and LP packages are available taped and reeled. Add

the suffix R to device type (e.g., TL317CDR). Chip forms are

tested at 25

°C.

Copyright

© 1999, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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INPUT

OUTPUT

OUTPUT

ADJUSTMENT

NC

OUTPUT

OUTPUT

NC

D PACKAGE

(TOP VIEW)

LP PACKAGE

(TOP VIEW)

NC – No internal connection

OUTPUT terminals are all internally connected.

INPUT

OUTPUT

ADJUSTMENT