IRS25751LPBF_15 Datasheet, PDF (1/13 Pages) International Rectifier – High-Voltage Start-Up IC

HVIC^TM
Features
 Up to 480V voltage capability
 ^{Constant output current (4.5mA)}
 ^{Programmable upper threshold level}
 ^{Fixed lower threshold (4.2V)}
 ^{ENN input}
 ^{Over-temperature shutdown}
 ^{Ultra-low off current (2.5µA)}
 ^{Internal 20.8V clamp on VOUT pin}
 Excellent latch immunity on all inputs & outputs
 Integrated ESD protection on all pins
 5-pin SOT-23 package
Applications
 High-voltage start-up
 Low standby power circuits
 General purpose switched mode power electronics
Application Diagram
IRS25751LPBF
High-Voltage Start-Up IC
Description
The IRS25751 is a 480V high-voltage start-up
IC ideal for supplying initial supply starting current
from a high-voltage bus. The IRS25751 supplies
a constant current during start-up and then
consumes ultra-low standby (off) current.
Additional features include programmability of the
upper turn-off threshold, an ENN input, and over-
temperature protection. IR’s proprietary HVIC
technology provides robust operation from high
input voltage levels with simple yet flexible
features.
Package Options
5-Pin SOT-23
DC Bus (+)
From AUX
Supply
VCC (+)
VOUT
VIN
1
5
CVCC
VCC (-)
R1 _COM
2
R2
VTH
ENN
3
4
DC Bus (-)
Ordering Information
Base Part Number
IRS25751LPBF
Package Type
5L-SOT-23
Standard Pack
Form
Quantity
Tape and Reel
3000
1 www.irf.com © 2015 International Rectifier
Orderable Part Number
IRS25751LTRPBF
January 15, 2015