LM117HVQML Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – 3-Terminal Adjustable Regulator

February 13, 2008
LM117HVQML
3-Terminal Adjustable Regulator
General Description
The LM117HV are adjustable 3-terminal positive voltage reg-
ulators capable of supplying either 0.5A or 1.5A over a 1.2V
to 57V output range. They are exceptionally easy to use and
require only two external resistors to set the output voltage.
Further, both line and load regulation are better than standard
fixed regulators.
In addition to higher performance than fixed regulators, the
LM117HV series offers full overload protection available only
in IC's. Included on the chip are current limit, thermal overload
protection and safe area protection. All overload protection
circuitry remains fully functional even if the adjustment termi-
nal is disconnected.
Normally, no capacitors are needed unless the device is sit-
uated more than 6 inches from the input filter capacitors in
which case an input bypass is needed. An optional output ca-
pacitor 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 stan-
dard 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 volt-
age, supplies of several hundred volts can be regulated as
long as the maximum input to output differential is not ex-
ceeded, i.e. do not short the output to ground.
Also, it makes an especially simple adjustable switching reg-
ulator, 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. Sup-
plies 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.
Features
■ ^{Available with radiation guarantee}
— Total Ionizing Dose
100 krad(Si)
— Low Dose Rate Qualified
100 krad(Si)
■ ^{Adjustable output down to 1.2V}
■ ^{Guaranteed 0.5A or 1.5A output current}
■ ^{Line regulation typically 0.01%/V}
■ ^{Load regulation typically 0.1%}
■ ^{Current limit constant with temperature}
■ ^{Eliminates the need to stock many voltages}
■ ^{80 dB ripple rejection}
■ ^{Output is short-circuit protected}
Ordering Information
NS Part Number
LM117HVH/883
LM117HVH-QML
LM117HVHRQMLV (Note 7)
LM117HVHRLQMLV (Note 8)
Low Dose Rate Qualified
LM117HVK/883
LM117HVK-QML
LM117HVWG-QML
LM117HVWGRQMLV (Note 7)
LM117HVWGRLQMLV (Note 8)
Low Dose Rate Qualified
SMD Part Number
5962-0722901QXA
5962R0722901VXA
100 krad(Si)
5962R0722961VXA
100 krad(Si)
5962-0722903QYA
5962-0722901QZA
5962R0722901VZA
100 krad(Si)
5962R0722961VZA
100 krad(Si)
NS Package Number
H03A
H03A
H03A
Package Description
3LD T0–39 Metal Can
3LD T0–39 Metal Can
3LD T0–39 Metal Can
H03A
3LD T0–39 Metal Can
K02C
K02C
WG16A
WG16A
2LD T0–3 Low Profile Metal Can
2LD T0–3 Low Profile Metal Can
16LD Ceramic SOIC
16LD Ceramic SOIC
WG16A
16LD Ceramic SOIC
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