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TL317

3-TERMINAL ADJUSTABLE REGULATORS

SLVS004C – APRIL 1979 – REVISED JULY 1999

D

Output Voltage Range Adjustable From

D

D

D

D

1.2 V to 32 V When Used With an External

Resistor Divider

Output Current Capability of 100 mA

Input Regulation Typically 0.01% Per

Input-Voltage Change

Output Regulation Typically 0.5%

Ripple Rejection Typically 80 dB

D PACKAGE

(TOP VIEW)

INPUT

OUTPUT

OUTPUT

ADJUSTMENT

1

2

3

4

8

7

6

5

NC

OUTPUT

OUTPUT

NC

NC – No internal connection

OUTPUT terminals are all internally connected.

LP PACKAGE

(TOP VIEW)

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.

INPUT

OUTPUT

ADJUSTMENT

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

T

J

0°C to 125°C

SMALL

OUTLINE

(D)

TL317CD

PLASTIC

(LP)

TL317CLP

CHIP

FORM

(Y)

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.

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

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

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.

Copyright © 1999, Texas Instruments Incorporated

POST OFFICE BOX 655303 DALLAS, TEXAS 75265

•

1

元器件交易网

SLVS004C – APRIL 1979 – REVISED JULY 1999

TL317

3-TERMINAL ADJUSTABLE REGULATORS

schematic

INPUT

310 Ω310

Ω

190 Ω251

Ω

5.6 k

Ω

2.1 k

Ω

200 kΩ

360

Ω

1.4 Ω

124 Ω

11.5 k

Ω

30

pF

195

Ω

5.7 k

Ω

70

Ω

5.1 k

Ω

30

pF

2.12 k

Ω

5.3 kΩ

10.8 k

Ω

670 Ω

NOTE A:All component values shown are nominal.

40

Ω

OUTPUT

ADJUSTMENT

absolute maximum ratings over operating temperature range (unless otherwise noted)

†

Input-to-output differential voltage, V

l

– V

O

35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V

Operating free-air, T

A

, case, or virtual-junction temperature range, T

J

: TL317C . . . . . . . . . . . . 0°C to 150°C

Package thermal impedance, θ

JA

(see Notes 1 and 2):D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W

LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 156°C/W

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

Storage temperature range, T

stg

–65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . °C to 150°C

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:m power dissipation is a function of T

J

(max),

θ

JA

, and T

A

. The maximum allowable power dissipation at any allowable

ambient temperature is P

D

= (T

J

(max) – T

A

)/

θ

JA

. Operating at the absolute maximum T

J

of 150°C can impact reliability.

package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace

length of zero.

recommended operating conditions

MIN

Input-to-output voltage differential, V

I

– V

O

Output current, I

O

Operating virtual-junction temperature, T

J

TL317C

2.5

0

MAX

35

100

125

UNIT

V

mA

°C

2

POST OFFICE BOX 655303 DALLAS, TEXAS 75265

•

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