Bay Linear
Inspire the Linear Power
1.00Amp High Current Low Dropout
Voltage Regulator Adjustable & Fix
B1129/B1129-3.3/B1129-5.0
Description
The Bay Linear B1129 is a 1 Amp high accuracy, low dropout
voltage regulator with only 40mV at light loads and
450mV(Typ.)@ 1.0A) and low quiescent current of 240µA typical.
The B1129 is designed for low voltage a application that requires
lower dropout voltage and faster transient response. This device is
an excellent choice for use in powering low voltage applications
where require a lower dropout, faster transient response and as a
post regulator for switching supplies applications.
The B1129 offers full protection against over-current faults,
reversed input polarity, reversed load insertion, and positive and
negative transient voltage. On-Chip trimming adjusts the reference
voltage to 1%. The B1129-xx devices are in 3 pin fixed voltage
regulators. The B1129 include an Enable pin in the 5 pin packages.
The B1129are offered in a 3 & 5-pin SOT-223 & TO-263 package
compatible with other 3 terminal regulators. .
Features
• High output accuracy of 2% 3.3V & 5.0V
• Output Adjustable from 1.24V to 26V
• Output Current of 1.00A
• Low Dropout Voltage
• Low quiescent current
• Extremely Tight Load & Line Regulation
• Reverse-battery and “Load Dump” Protection
• Zero Current Shutdown Mode (5-pin version)
• Offer in TO-263, & SOT-223
• Similar to industry Standard LT1129
Applications
• Powering VGA & Sound Card
• LCD Monitor
• Battery Powered Equipments/Laptop & Notebook
• SMPS Post Regulator / DC to DC Modules
• High Efficiency Linear Power Supply
• Adjustable Power Supply
• Bar Code Scanners
Pin Connection
Ordering Information
Devices
B1129N-X
B1129S
Package
SOT-223
TO-263
Temp.
-40 °C to 125 °C
-40 °C to 125 °C
TO-263-5 Package
BAY
B21914219
1 2 3 45
1) OUT
2) ADJ
3) GND
4) ON/OFF
5) OUPUT
SOT -223
Tab GND
Top View
Adj/GIND OGUNTD IONUT
Front View
Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com