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LR645 - High-Input Voltage SMPS Start-up/Linear Regulator

General Description

LR645 is a high-input voltage, low-output current, linear regulator that is available in two versions.

A 3-terminal, fixed-output voltage version is available in TO-92, TO220 and SOT-89 packages, as well as an adjustable voltage version available in an 8-lead SOIC package.

Key Features

  • Accepts inputs from 15 to 450V.
  • Output currents: up to 3.0mA continuous, 30mA peak.
  • Supply current typically 50µA.
  • Line regulation typically 0.1mV/V.
  • Output can be trimmed from 8.0 to 12V.
  • Output current can be increased to 150mA with external FET.

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Datasheet Details

Part number LR645
Manufacturer Microchip
File Size 409.26 KB
Description High-Input Voltage SMPS Start-up/Linear Regulator
Datasheet download datasheet LR645 Datasheet

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Full PDF Text Transcription (Reference)

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LR645 High-Input Voltage SMPS, Start-up/Linear Regulator Features • Accepts inputs from 15 to 450V • Output currents: up to 3.0mA continuous, 30mA peak • Supply current typically 50µA • Line regulation typically 0.1mV/V • Output can be trimmed from 8.0 to 12V • Output current can be increased to 150mA with external FET Applications • Off-line SMPS startup circuits (pulse loads) • Low power off-line regulators • Regulators for noisy inputs Description LR645 is a high-input voltage, low-output current, linear regulator that is available in two versions. A 3-terminal, fixed-output voltage version is available in TO-92, TO220 and SOT-89 packages, as well as an adjustable voltage version available in an 8-lead SOIC package.