Semtech SC21152

Description

The SC21152 is an ultra high efficiency 1.2A DC/DC buckregulator available in a small MLPD package. These featuresmake the SC21152 perfect for small form factor consumerapplications where high efficiency is essential.SC21152 is an Adaptive On-Time 4MHz switching regulatorat full load conditions. Under light load conditions ittransitions into PFM Power Save Mode and reduces switchingfrequency thus saving energy. High switching frequencyoperation allows the use of a very small 0.47μHinductor along with small input and output capacitors tominimize overall circuit size.The SC21152 is highly configurable with a wide range offactory options including internal soft start time, fixed oradjustable output voltage, automatic output discharge,and switching frequency.The SC21152 is offered in a small 6-Lead 1.5mm x 2mmMLPD package.

Features

Input voltage range — 2.3V to 5.5V1.2A continuous output current4MHz switching frequencyAdjustable Output Voltage1% output voltage accuracyAdaptive On-Time architectureUp to 100% duty cycleUp to 96% peak efficiencyPower Save mode for efficient light load operation

90% efficiency 30mA to 75mA0.1μA shutdown current21μA quiescent currentPower Good IndicatorPre-bias startup protectionInternal soft start1.5mm x 2mm, 6-Lead MLPD packageWEEE and RoHS compliant and halogen-free

Typical applications

• Portable devices
• Tablet PCs
• Battery powered equipment
• GPS devices
• Smart Phones
• Wearable Electronics

More information

• Datasheet
• IC product information