November 2007 Rev. 4 1/18
18
STLQ50XX
50 mA, 3 µA supply current low drop linear regulator
Features
■ 2.3 V to 12 V input voltage range
■ 50 mA maximum output current
■ 3 µA quiescent current
■ Available in 1.8 V, 2.5 V, 3.3 V, 5.0 V and
adjustable
■ 200 mV dropout voltage at 25 mA output
current
■ Internal thermal protection
■ Available in SOT323-5L package, and SOT23-
5L package (upon request)
Applications
■ Portable/battery powered equipments
■ Electronic sensors
■ Microcontroller power
■ Real time clock backup power
Description
The STLQ50 is a BiCMOS linear regulator
specifically designed for operating in environment
with very low power consumption constraints.
Due to the very low quiescent current (3 µA) the
device is suitable for those application that have
very long stand-by time allowing extension of
battery life.
The P-MOS pass element allows also a very good
drop-out figure (200 mV at 25 mA I
O
and 350 mV
at full load) without affecting the consumption
characteristics.
Housed in the very small SOT323-5L or SOT23-
5L, it fulfils the space saving requirements in
battery powered equipments.
SOT23-5L
SOT323-5L
(available on request)
Table 1. Device summary
Part number
Order codes
Output voltagePackages
SOT323-5L (T&R) SOT23-5L (T&R)
(1)
STLQ50XX18 STLQ50C18R STLQ50M18R Fixed V
O
= 1.8V
STLQ50XX25 STLQ50C25R STLQ50M25R Fixed V
O
= 2.5V
STLQ50XX33 STLQ50C33R STLQ50M33R Fixed V
O
= 3.3V
STLQ50XX50 STLQ50C50R STLQ50M50R Fixed V
O
= 5.0V
STLQ50 STLQ50C-R STLQ50M-R Adjustable
1. Available upon request.
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