参数资料
型号: 5962-8876101EA
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 稳压器
英文描述: 1.5 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, CDIP16
封装: CERAMIC, DIP-16
文件页数: 4/12页
文件大小: 332K
代理商: 5962-8876101EA
National P/N LM78S40 - Universal Switching Regulator Subsystem
LM78S40C
MDA
Full
production
N/A
tray
of
N/A
-
5962-
8876101EA
Full
production
N/A
50+ $14.1000
rail
of
25
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LM78S40J/883QM
5962-8876101EA
General Description
The LM78S40 is a monolithic regulator subsystem consisting of all the active building blocks necessary for
switching regulator systems. The device consists of a temperature compensated voltage reference, a duty-
cycle controllable oscillator with an active current limit circuit, an error amplifier, high current, high voltage
output switch, a power diode and an uncommitted operational amplifier. The device can drive external NPN
or PNP transistors when currents in excess of 1.5A or voltages in excess of 40V are required. The device can
be used for step-down, step-up or inverting switching regulators as well as for series pass regulators. It
features wide supply voltage range, low standby power dissipation, high efficiency and low drift. It is useful
for any stand-alone, low part count switching system and works extremely well in battery operated systems.
Features
q
Step-up, step-down or inverting switching regulators
q
Output adjustable from 1.25V to 40V
q
Peak currents to 1.5A without external transistors
q
Operation from 2.5V to 40V input
q
Low standby current drain
q
80 dB line and load regulation
q
High gain, high current, independent op amp
q
Pulse width modulation with no double pulsing
Application Notes
Title
Size in Kbytes Date
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AN-711: Application Note 711
LM78S40 Switching Voltage
Regulator Applications
346 Kbytes
2-Mar-99 View Online
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[Information as of 5-Aug-2002]
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