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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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