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 availa...