Product Summary

The LT1129CST-3.3 is a micropower low dropout regulator with shutdown. The LT1129CST-3.3 is capable of supplying 700mA of output current with a dropout voltage of 0.4V at maximum output. Designed for use in battery-powered systems the low quiescent current, 50μA operating and 16μA in shutdown, make them an ideal choice. The quiescent current does not rise in dropout as it does with many other low dropout PNP regulators. The applications of the LT1129CST-3.3 include Low Current Regulator, Regulator for Battery-Powered Systems, Post Regulator for Switching Supplies, 5V to 3.3V Logic Regulator.

Parametrics

LT1129CST-3.3 absolute maximum ratings: (1)Input Voltage: ±30V; (2)Output Pin Reverse Current: 10mA; (3)Sense Pin Current: 10mA; (4)Adjust Pin Current: 10mA; (5)Shutdown Pin Input Voltage (Note 1): 6.5V, – 0.6V; (6)Shutdown Pin Input Current (Note 1): 20mA; (7)Output Short-Circuit Duration: Indefinite; (8)Storage Temperature Range: – 65 to 150℃.

Features

LT1129CST-3.3 features : (1)0.4V Dropout Voltage; (2)700mA Output Current; (3)50μA Quiescent Current; (4)No Protection Diodes Needed; (5)Adjustable Output from 3.8V to 30V; (6)3.3V and 5V Fixed Output Voltages; (7)Controlled Quiescent Current in Dropout; (8)Shutdown; (9)16μA Quiescent Current in Shutdown; (10)Stable with 3.3μF Output Capacitor; (11)Reverse Battery Protection; (12)No Reverse Output Current; (13)Thermal Limiting; (14)Surface Mount.

Diagrams

LT1129CST-3.3 pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LT1129CST-3.3
LT1129CST-3.3


IC REG LDO 3.3V .7A SOT223-3

Data Sheet

0-2808: $1.41
LT1129CST-3.3#PBF
LT1129CST-3.3#PBF


IC REG LDO 3.3V .7A SOT223-3

Data Sheet

0-1: $2.71
1-25: $1.80
25-100: $1.41
LT1129CST-3.3#TR
LT1129CST-3.3#TR


IC REG LDO 3.3V .7A SOT223-3

Data Sheet

0-4000: $1.44
LT1129CST-3.3#TRPBF
LT1129CST-3.3#TRPBF


IC REG LDO 3.3V .7A SOT223-3

Data Sheet

0-2000: $1.44