POWER MANAGEMENT



SC21150

Tiny 1.2A Synchronous

Buck Regulator

Typical Application Circuit

Rev 2.0

Features

Input voltage range — 2.3V to 5.5V

.2A continuous output current

4MHz switching frequency

Adjustable Output Voltage

0.8V to VIN

% output voltage accuracy

Adaptive On-Time architecture

Up to 00% duty cycle

Up to 96% peak efficiency

Power Save mode for efficient light load operation

>90% efficiency 30mA to 75mA

μA 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 .mm, 6-Bump WLCSP Package

WEEE and RoHS compliant and halogen-free

Applications

Automotive

Smart Phones

Wearable Electronics

Tablet PCs

GPS devices

Battery powered equipment

Portable devices

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Description

The SC250 is an ultra high efficiency .2A DC/DC buck

regulator available in a tiny CSP package. These features

make the SC250 family perfect for small form factor

portable applications where long battery life is essential.

SC250 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 SC250 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 SC250 is offered in an ultra small WLCSP 6-Bump

0.75mm x.mm package with a bump pitch of 0.35mm.

The SC250 operating temperature range is -40C to

+85C.

2.3V-5.5V Supply

SC21150

0.47µH

1.2A

Output

EN

VIN

LX

EN

GND

FB

10µF

4.7µF

FPWM

Adjustable Output Voltage

FPWM