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SC1537 - 700mA SmartLDOTM

Datasheet Summary

Description

The SC1537 is designed to maintain a glitch-free 3.3V output when at least one of two inputs, 5V (VIN) and 3.3V (VAUX), is present.

Whenever VIN exceeds a predetermined threshold value, the internal 3.3V linear regulator is enabled, and DR is pulled high.

Features

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  • = Glitch-free transition between input sources Internal logic selects input source Gate drive for external PMOS bypass switch 5V detector with hysteresis 1% regulated output voltage accuracy 700mA load current capability SO-8 and TO-263 packages.

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Datasheet preview – SC1537

Datasheet Details

Part number SC1537
Manufacturer Semtech Corporation
File Size 95.32 KB
Description 700mA SmartLDOTM
Datasheet download datasheet SC1537 Datasheet
Additional preview pages of the SC1537 datasheet.

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Full PDF Text Transcription

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700mA SmartLDO TM SC1537 PRELIMINARY - July 25, 2000 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1537 is designed to maintain a glitch-free 3.3V output when at least one of two inputs, 5V (VIN) and 3.3V (VAUX), is present. Whenever VIN exceeds a predetermined threshold value, the internal 3.3V linear regulator is enabled, and DR is pulled high. When VIN falls below a lower threshold value, DR is pulled low and the internal linear regulator is turned off. DR has been designed to drive the gate of an external low threshold P-channel MOSFET, which can be used to connect the 3.3V supply directly to the regulator output. This ensures an uninterrupted 3.3V output even if VIN falls out of specification. A maximum RDS(ON) of 100mΩ is recommended.
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