STLQ50
Product Page
The optimization of the low quiescent current in power supply designs
has become of great importance. A long battery life is essential
and depends on the consumption of the power supply at a given load.
One way to decrease the consumption especially at low output loads
is to minimize the quiescent current of the power regulator IC.
There are portable applications where the device is required to
work at full load for a very short time only, while it has a very
long stand-by time. In this case a very low quiescent current helps. |
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As a result of this market demand, ST has developed the STLQ50,
a BiCMOS linear regulator specifically designed for operating in
environments with very low power consumption constraints. Due to
the very low quiescent current (3 μA) the device extends the
battery life in applications with a very long stand-by time.
The Power MOSFET pass element also allows a very good drop-out figure
(200 mV at 25 mA Iout and 350 mV at full load) without affecting
the consumption characteristics.
Housed in the very small SOT323-5L (SC-70) and SOT23-5L packages,
the device fulfils the space saving requirements of battery powered
equipment.
Pin configuration
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Portable medical instruments
Alarm systems
Real-time clock backup power
Sensors
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 fixed output voltage and
in adjustable version
200 mV dropout voltage at 25 mA output current
Internal thermal protection
Small SOT323-5L and SOT23-5L packages
Internal block diagram
Typical application schematic (fixed Vout)
Package
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Output voltage
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SOT323-5L
(T&R)
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SOT23-5L
(T&R)
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STLQ50C18R |
STLQ50M18R |
Fixed VO
= 1.8 V |
STLQ50C25R |
STLQ50M25R |
Fixed VO
= 2.5 V |
STLQ50C33R |
STLQ50M33R |
Fixed VO
= 3.3 V |
STLQ50C50R |
STLQ50M50R |
Fixed VO
= 5.0 V |
STLQ50C-R |
STLQ50M-R |
Adjustable |
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