Tiny 1.2A Synchronous Buck Regulator with Power Good

Topology: Buck
Input Voltage (min.): 2.30 V
Input Voltage (max.): 5.50 V
Switching Frequency (min.): 3600.00 kHz
Switching Frequency (max.): 4400.00 kHz
Output 1: 3.30 V / 1.200 A

Original publication on 2015-09-01, revision 1.0


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.


  • 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


  Order Code SPEC Product series L
IR 1
IR 2
Typ H
74479876147 PDF WE-PMI Power Multilayer Inductor 0.47 1500 2100 2000 40 120 Low RDC & High Saturation Current 1