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Semtech SC21152

Tiny 1.2A Synchronous Buck Regulator with Power Good

Overview

TopologyBuck Converter
Input voltage2.3-5.5 V
Switching frequency3600-4400 kHz
Output 13.3 V / 1.2 A
IC revision1.0

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

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR 1
(mA)
IR 2
(mA)
ISAT
(mA)
RDC
(mΩ)
fres
(MHz)
TypeH
(mm)
Samples
74479876147
STE ALT EAG CAD LTS PSP SPE IGS CADWE-PMI Power Multilayer Inductor 0.47 1500 2100 2000 40 120 Low RDC & High Saturation Current 1
Order Code Data­sheet
74479876147
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR 1
(mA)
IR 2
(mA)
ISAT
(mA)
RDC
(mΩ)
fres
(MHz)
TypeH
(mm)
Samples