SC21150 Datasheet, PDF (1/20 Pages) Semtech Corporation – Tiny 1.2A Synchronous Buck Regulator

POWER MANAGEMENT
Features
 Input voltage range — 2.3V to 5.5V
 1.2A continuous output current
 4MHz switching frequency
 Adjustable Output Voltage
• 0.8V to VIN
 1% output voltage accuracy
 Adaptive On-Time architecture
 Up to 100% duty cycle
 Up to 96% peak efficiency
 Power Save mode for efficient light load operation
 >90% efficiency 30mA to 75mA
 1μA shutdown current
 23μA quiescent current
 Pre-bias startup protection
 Internal or optional external Soft Start
 Device options (contact Semtech Marketing)
• Automatic output discharge
• Power Good indicator
• Internal Soft Start
• External Programmable Soft Start
• Forced PWM Operation Input
 0.75mm x 1.11mm, 6-Bump WLCSP Package
 WEEE and RoHS compliant and halogen-free
SC21150
Tiny 1.2A Synchronous
Buck Regulator
Description
The SC21150 is an ultra high efficiency 1.2A DC/DC buck
regulator available in a tiny CSP package. These features
make the SC21150 family perfect for small form factor
portable applications where long battery life is essential.
SC21150 is an Adaptive On-Time 4MHz switching regula-
tor at full load conditions. Under light load conditions it
seamlessly transitions into Power Save Mode and reduces
switching frequency thus saving energy. High switching
frequency operation allows the use of a very small 0.47μH
inductor along with small input and output capacitors to
minimize overall circuit size. A Forced PWM input allows
continuous switching under all load conditions.
The SC21150 is highly configurable with a wide range of
factory options including internal Soft Start time, fixed or
adjustable output voltage, automatic output discharge,
and a Forced PWM input.
The SC21150 is offered in an ultra small WLCSP 6-Bump
0.75mm x1.11mm package with a bump pitch of 0.35mm.
The SC21150 operating temperature range is -40C to
+85C.
Applications
 Automotive
 Smart Phones
 Wearable Electronics
 Tablet PCs
 GPS devices
 Battery powered equipment
 Portable devices
Typical Application Circuit
Adjustable Output Voltage
2.3V-5.5V Supply
VIN
LX
4.7µF
SC21150
0.47µH
1.2A
Output
10µF
FPWM
FPWM
FB
EN
EN
GND
Rev 2.0