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SC1532 - 400mA Smart LDO

General Description

Intended for applications such as Power Managed PCI, the SC1532 is designed to maintain a glitch-free 3.3V output when at least one of two inputs, 5V (VIN1) and 3.3V (VIN2), is present.

Key Features

  • Glitch-free transition between input sources.
  • Internal logic selects input source.
  • 5V detector with hysteresis.
  • 1% regulated output voltage accuracy.
  • 400mA load current capability.

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Datasheet Details

Part number SC1532
Manufacturer SEMTECH
File Size 109.53 KB
Description 400mA Smart LDO
Datasheet download datasheet SC1532 Datasheet

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Other Datasheets by SEMTECH

Part Number Description
SC1531 200mA & 250mA SmartLDOs
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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400mA SmartLDO MOSFET January 3, 2000 TM with Internal Pass SC1532 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION Intended for applications such as Power Managed PCI, the SC1532 is designed to maintain a glitch-free 3.3V output when at least one of two inputs, 5V (VIN1) and 3.3V (VIN2), is present. The SC1532 combines a 5V to 3.3V linear regulator with an integral 3.3V bypass switch, along with logic and detection circuitry to control which supply provides the power for the output. Whenever VIN1 exceeds a predetermined threshold value, the internal 3.3V PMOS linear regulator is enabled, and the internal pass NMOS is turned off. When VIN1 falls below a lower threshold value, the NMOS pass device is turned on and the PMOS linear regulator is turned off.