( )

OUT

ADJ

R

V

= 1.25 V

I

R

R

2

2

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM317HV-MIL

SNVSAY1 – JUNE 2017

LM317HV-MIL High Voltage Three-Terminal Adjustable Regulator With Overload

Protection

1

1 Features

1

•

Up to 60 V Input to Output Differential

•

1.5-A Output Current

•

Line Regulation 0.01%/V (Typical)

•

Load Regulation 0.1% (Typical)

•

80-dB Ripple Rejection (Typical)

•

Internal Short-Circuit Current Limiting Protection

•

Thermal Overload Protection

•

0 to 125°C Operating Temperature Range

2 Applications

•

Industrial Power Supplies

•

PLC Systems

•

Factory Automation Systems

•

Building Automation Systems

•

Battery Charger

1.2-V to 50-V Adjustable Regulator With High

Voltage Input

*Needed if device is more than 6 inches from filter

capacitors. .

†Optional—improves transient response

††

3 Description

The

LM317HV-MIL

is

an

adjustable

3-terminal

positive voltage regulator capable of supplying 1.5 A

or more currents over a 1.25-V to 57-V output voltage

range. It requires only two external resistors to set the

output voltage. The LM317HV-MIL is packaged in

standard transistor packages that are easily mounted

and handled.

The LM317HV-MIL offers overload protection like

current limit, thermal overload protection and safe

area protection, which make the device blowout

proof. The overload protection circuitry remains fully

functional

even

if

the

adjustment

terminal

is

disconnected.

Typically, no capacitors are needed unless the device

is situated more than 6 inches from the input filter

capacitors, in which case an input bypass is needed.

An optional output capacitor can be added to improve

transient response. The adjustment terminal can be

bypassed to achieve very high ripple rejection ratios

which are difficult to achieve with standard 3-terminal

regulators.

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,

or in other words, do not short the output to ground.

By

connecting

a

fixed

resistor

between

the

adjustment and output, the LM317HV-MIL can also

be used as a precision current regulator. Supplies

with

electronic

shutdown

can

be

achieved

by

clamping the adjustment terminal to ground, which

programs the output to 1.25 V where most loads draw

little current.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM317HV-MIL

TO-39 (3)

8.255 mm × 8.255 mm

TO-3 (2)

19.507 mm × 19.507 mm

TO-220 (3)

14.986 mm × 10.16 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.