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LM120 データシート(PDF) 1 Page - Texas Instruments

部品番号 LM120
部品情報  LM120/LM320-N Series 3-Terminal Negative Regulators
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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LM120 データシート(HTML) 1 Page - Texas Instruments

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LM120, LM320-N
www.ti.com
SNVS756C – APRIL 1998 – REVISED APRIL 2013
LM120/LM320-N Series 3-Terminal Negative Regulators
Check for Samples: LM120, LM320-N
Exceptional effort has been made to make the LM120
1
FEATURES
Series immune to overload conditions. The regulators
2
Preset Output Voltage Error Less than ±3%
have
current
limiting
which
is
independent
of
Preset Current Limit
temperature,
combined
with
thermal
overload
protection. Internal current limiting protects against
Internal Thermal Shutdown
momentary faults while thermal shutdown prevents
Operates with Input-Output Voltage Differential
junction temperatures from exceeding safe limits
down to 1V
during prolonged overloads.
Excellent Ripple Rejection
Although primarily intended for fixed output voltage
Low Temperature Drift
applications, the LM120 Series may be programmed
Easily Adjustable to Higher Output Voltage
for higher output voltages with a simple resistive
divider. The low quiescent drain current of the
devices allows this technique to be used with good
DESCRIPTION
regulation.
The
LM120
series
are
three-terminal
negative
regulators with a fixed output voltage of
−5V, −12V,
Table 1. LM120 Series Packages and Power
and
−15V, and up to 1.5A load current capability.
Capability
Where other voltages are required, the LM137 and
Device
Package
Rated Power
Design
LM137HV series provide an output voltage range of
Dissipation
Load
−1.2V to −47V.
Current
The LM120 need only one external component—a
LM120/LM320-
TO-3 (NDS)
20W
1.5A
compensation capacitor at the output, making them
N
easy to apply. Worst case specifications on output
TO (NDT)
2W
0.5A
voltage deviation due to any combination of line, load
LM320-N
TO-220 (NDE)
15W
1.5A
or temperature variation assure satisfactory system
operation.
Typical Applications
*Required if regulator is separated from
filter capacitor by more than 3 inches. For
value given, capacitor must be solid
tantalum. 25
μF aluminum electrolytic may
be substituted.
†Required for stability. For value given,
capacitor must be solid tantalum. 25
μF
aluminum electrolytic may be substituted.
Values given may be increased without
limit.
For output capacitance in excess of 100
μF, a high current diode from input to
output (1N4001, etc.) will protect the
regulator from momentary input shorts.
Figure 1. Dual Trimmed Supply
Figure 2. Fixed Regulator
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2013, 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.


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