LM79L05ACMX 반도체 회로 부품 판매점
3-Terminal Negative Regulators
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 National Semiconductor |
January 2003
LM320L/LM79LXXAC/LM13121 Series
3-Terminal Negative Regulators
General Description
The LM320L/LM79LXXAC/LM13121 dual marked series of
3-terminal negative voltage regulators features fixed output
voltages of −5V, −12V, and −15V with output current capa-
bilities in excess of 100mA. These devices were designed
using the latest computer techniques for optimizing the pack-
aged IC thermal/electrical performance. The LM79LXXAC
series, even when combined with a minimum output com-
pensation capacitor of 0.1µF, exhibits an excellent transient
response, a maximum line regulation of 0.07% VO/V, and a
maximum load regulation of 0.01% VO/mA.
The LM320L/LM79LXXAC/LM13121 series also includes, as
self-protection circuitry: safe operating area circuitry for out-
put transistor power dissipation limiting, a temperature inde-
pendent short circuit current limit for peak output current
limiting, and a thermal shutdown circuit to prevent excessive
junction temperature. Although designed primarily as fixed
voltage regulators, these devices may be combined with
simple external circuitry for boosted and/or adjustable volt-
ages and currents. The LM79LXXAC series is available in
the 3-lead TO-92 package, 8-lead SOIC package, and the
6-Bump micro SMD package. The LM320L series is avail-
able in the 3-lead TO-92 package.
For output voltage other than −5V, −12V and −15V, the
LM137L series provides an output voltage range from 1.2V
to 47V.
Features
n Preset output voltage error is less than ±5% overload,
line and temperature
n Specified at an output current of 100mA
n Easily compensated with a small 0.1µF output
capacitor
n Internal short-circuit, thermal and safe operating area
protection
n Easily adjustable to higher output voltages
n Maximum line regulation less than 0.07% VOUT/V
n Maximum load regulation less than 0.01% VOUT/mA
n See AN-1112 for micro SMD considerations
Typical Applications
Fixed Output Regulator
Adjustable Output Regulator
00774801
*Required if the regulator is located far from the power supply filter. A 1µF
aluminum electrolytic may be substituted.
**Required for stability. A 1µF aluminum electrolytic may be substituted.
−V0 = −5V − (5V/R1 + IQ) • R2,
5V/R1 > 3 IQ
Connection Diagrams
6-Bump micro SMD
TO-92 Plastic Package (Z)
00774803
00774820
Bump Side Down
00774802
Bottom View
© 2003 National Semiconductor Corporation DS007748
www.national.com
Connection Diagrams (Continued)
SO-8 Plastic (Narrow Body)
00774804
Top View
Ordering Information
Package
8-Lead SOIC
3-Pin TO-92
6-Bump
micro SMD
Part Number
LM79L05ACM
LM79L05ACMX
LM79L13ACM
LM79L13ACMX
LM79L15ACM
LM79L15ACMX
LM13121Z-5.0
LM13121Z-12
LM13121Z-15
LM79L05ACTL
LM79L05ACTLX
Package Marking
LM79L05ACM
LM79L12ACM
LM79L15ACM
320L79L05
320L79L12
320L79L15
XTPB
Transport Media
95 Units/Rail
2.5k Units Tape and Reel
95 Units/Rail
2.5k Units Tape and Reel
95 Units/Rail
2.5k Units Tape and Reel
1800 Units Per Box
1800 Units Per Box
1800 Units Per Box
250 Units Tape and Reel
3k Units Tape and Reel
NSC Drawing
M08A
Z03A
TLA06AMA
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LM79L05ACMX regulator
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LM79L05ACM
3-Terminal Negative Regulators - National Semiconductor
LM79L05ACMX
3-Terminal Negative Regulators - National Semiconductor