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SC21152 Datasheet, PDF (1/18 Pages) Semtech Corporation – Tiny 1.2A Synchronous Buck Regulator with Power Good | |||
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POWER MANAGEMENT
Features
ï® Input voltage range â 2.3V to 5.5V
ï® 1.2A continuous output current
ï® 4MHz switching frequency
ï® Adjustable Output Voltage
ï® 1% output voltage accuracy
ï® Adaptive On-Time architecture
ï® Up to 100% duty cycle
ï® Up to 96% peak efficiency
ï® Power Save mode for efficient light load operation
ï® >90% efficiency 30mA to 75mA
ï® 0.1μA shutdown current
ï® 21μA quiescent current
ï® Power Good Indicator
ï® Pre-bias startup protection
ï® Internal soft start
ï® 1.5mm x 2mm, 6-Lead MLPD package
ï® WEEE and RoHS compliant and halogen-free
Applications
ï® Tablet PCs
ï® GPS devices
ï® Battery powered equipment
ï® Portable devices
ï® Smart Phones
ï® Wearable Electronics
Typical Application Circuit
SC21152
Tiny 1.2A Synchronous Buck
Regulator with Power Good
Description
The SC21152 is an ultra high efficiency 1.2A DC/DC buck
regulator available in a small MLPD package. These fea-
tures make the SC21152 perfect for small form factor con-
sumer applications where high efficiency is essential.
SC21152 is an Adaptive On-Time 4MHz switching regula-
tor at full load conditions. Under light load conditions it
transitions into PFM Power Save Mode and reduces switch-
ing frequency thus saving energy. High switching fre-
quency operation allows the use of a very small 0.47μH
inductor along with small input and output capacitors to
minimize overall circuit size.
The SC21152 is highly configurable with a wide range of
factory options including internal soft start time, fixed or
adjustable output voltage, automatic output discharge,
and switching frequency.
The SC21152 is offered in a small 6-Lead 1.5mm x 2mm
MLPD package.
2.3V-5.5V Supply
Power
Good
4.7µF
Fixed Output Voltage
VIN
LX
SC21152
1.2A
0.47µH Output
10µF
PG
FB
EN
EN
GND
Adjustable Output Voltage
2.3V-5.5V Supply
Power
Good
4.7µF
VIN
LX
SC21152
1.2A
0.47µH Output
10µF
PG
FB
EN
EN
GND
Rev 1.0
© 2015 Semtech Corporation
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