LM117HVQML, LM117HVQML-SP

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SNVS357D – MARCH 2006 – REVISED APRIL 2013

LM117HVQML 3-Terminal Adjustable Regulator

Check for Samples: LM117HVQML, LM117HVQML-SP

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FEATURES

DESCRIPTION

The LM117HV are adjustable 3-terminal positive

2

•

Available with Radiation Ensured

voltage regulators capable of supplying either 0.5A or

–

Total Ionizing Dose 100 krad(Si)

1.5A over a 1.2V to 57V output range. They are

–

Low Dose Rate Qualified 100 krad(Si)

exceptionally easy to use and require only two

external resistors to set the output voltage. Further,

•

Adjustable Output down to 1.2V

both line and load regulation are better than standard

•

Specified 0.5A or 1.5A Output Current

fixed regulators.

•

Line Regulation Typically 0.01%/V

In

addition

to

higher

performance

than

fixed

•

Load Regulation Typically 0.1%

regulators, the LM117HV series offers full overload

•

Current Limit Constant with Temperature

protection available only in IC's. Included on the chip

are current limit, thermal overload protection and safe

•

Eliminates the Need to Stock Many Voltages

area protection. All overload protection circuitry

•

80 dB Ripple Rejection

remains fully functional even if the adjustment

•

Output is Short-Circuit Protected

terminal is disconnected.

Normally, 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 rejections ratios

which are difficult to achieve with standard 3-terminal

regulators.

Besides replacing fixed regulators, the LM117HV 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,

i.e. do not short the output to ground.

Also, it makes an especially simple adjustable

switching regulator, a programmable output regulator,

or by connecting a fixed resistor between the

adjustment and output, the LM117HV can 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 1.2V where most loads draw little current.

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

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.