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LM78S40 - Universal Switching Regulator Subsystem

Datasheet Summary

Description

The LM78S40 is a monolithic regulator subsystem consisting of all the active building blocks necessary for switching regulator systems.

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 n n n n n n n n Step-up, step-down or inverting switching regulators Output adjustable from 1.25V to 40V Peak currents to 1.5A without external transistors Operation from 2.5V to 40V input Low standby current drain 80 dB line and load regulation High gain, high current, independen.

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Datasheet Details

Part number LM78S40
Manufacturer National Semiconductor
File Size 289.83 KB
Description Universal Switching Regulator Subsystem
Datasheet download datasheet LM78S40 Datasheet
Additional preview pages of the LM78S40 datasheet.

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LM78S40 Universal Switching Regulator Subsystem April 1998 LM78S40 Universal Switching Regulator Subsystem 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.
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