Microchip Technology LR645
LR645 is a high-input voltage, low-output current, linear regulator that is available in two versions. The 3-terminal version of LR645 functions like any other low-voltage, 3-terminal regulator except it allows the use of much higher-input voltages. When used in a Switched-mode Power Supply (SMPS), start-up circuit, LR645 eliminates the need for large| Part No. | LR645 |
|---|---|
| Datasheet | LR645 Download |
| Manufacturer |  Microchip Technology |
| Description | High-Input Voltage SMPS Start-up/Linear Regulator |
| Buy | Stock & Price |
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
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.
