LM317T “3-Terminal

LM317T “3-Terminal 1.5A Adjustable Positive Regulator”

TO-220 TO-220FP
D²PAK
Features
• Output voltage range: 1.2 to 37 V
• Output current in excess of 1.5 A
• 0.1% line and load regulation
• Floating operation for high voltages
• Complete series of protections: current limiting, thermal shutdown and SOA
control
Description
The LM217, LM317 are monolithic integrated circuits in TO-220, TO-220FP and
D²PAK packages intended for use as positive adjustable voltage regulators.
They are designed to supply more than 1.5 A of load current with an output voltage
adjustable over a 1.2 to 37 V range.
The nominal output voltage is selected by means of a resistive divider, making the
device exceptionally easy to use and eliminating the stocking of many fixed
regulators.
Product status link
LM217
LM317
1.2 V to 37 V adjustable voltage regulators
LM217, LM317
Datasheet
DS0433 – Rev 21 – July 2019
For further information contact your local STMicroelectronics sales office.

4 Electrical characteristics
VI – VO = 5 V, IO = 500 mA, IMAX = 1.5 A and PMAX = 20 W, TJ = – 25 to 150 °C, unless otherwise specified.
Table 3. Electrical characteristics for LM217
Symbol Parameter Test conditions Min. Typ. Max. Unit
ΔVO Line regulation VI – VO = 3 to 40 V
TJ = 25°C 0.01 0.02
%/V
0.02 0.05
ΔVO Load regulation
VO ≤ 5 V
IO = 10 mA to IMAX
TJ= 25°C 5 15
mV
20 50
VO ≥ 5 V,
IO = 10 mA to IMAX
TJ = 25°C 0.1 0.3
%
0.3 1
IADJ Adjustment pin current 50 100 μA
ΔIADJ Adjustment pin current VI – VO = 2.5 to 40 V IO = 10 mA to IMAX 0.2 5 μA
VREF Reference voltage
VI – VO = 2.5 to 40 V IO = 10 mA to IMAX
PD ≤ PMAX
1.2 1.25 1.3 V
ΔVO/VO Output voltage temperature stability 1 %
IO(min) Minimum load current VI – VO = 40 V 3.5 5 mA
IO(max) Maximum load current
VI – VO ≤ 15 V, PD < PMAX 1.5 2.2
A
VI – VO = 40 V, PD < PMAX, TJ = 25°C 0.4
eN Output noise voltage (percentage of VO) B = 10 Hz to 100 kHz, TJ = 25°C 0.003 %
SVR Supply voltage rejection (1) TJ = 25°C, f = 120 Hz
CADJ = 0 65
dB
CADJ = 10 μF 66 80
1. CADJ is connected between adjust pin and ground.

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