SC21154AULTRC Semtech

SC21154 Tiny 1.2A Synchronous Buck Regulator with Programmable Soft Start POWER MANAGEMENT Features Description Input voltage range 2.3V to 5.5V The SC21154 is an ultra high efficiency 1.2A DC/DC buck 1.2A continuous output current regulator available in a small MLPD package. These fea- 4MHz switching frequency tures make the SC21154 perfect for small form factor con- Adjustable Output Voltage sumer applications where high efficiency is essential. 1% output voltage accuracy SC21154 is an Adaptive On-Time 4MHz switching regula- Adaptive On-Time architecture tor at full load conditions. Under light load conditions it Up to 100% duty cycle transitions into PFM Power Save Mode and reduces switch- Up to 96% peak efficiency ing frequency thus saving energy. High switching fre- Power Save mode for efficient light load operation quency operation allows the use of a very small 0.47H >90% efficiency 30mA to 75mA inductor along with small input and output capacitors to 0.1A shutdown current minimize overall circuit size. 21A quiescent current Programmable soft start The SC21154 is highly configurable with a wide range of Pre-bias startup protection factory options including fixed or adjustable output 1.5mm x 2mm, 6-Lead MLPD package voltage, automatic output discharge, and switching WEEE and RoHS compliant and halogen-free frequency. The SC21154 is oeff red in a small 6-Lead 1.5mm x 2mm Applications MLPD package. Tablet PCs GPS devices Battery powered equipment Portable devices Smart Phones Wearable Electronics Typical Application Circuit Fixed Output Voltage Adjustable Output Voltage 1.2A 1.2A 2.3V-5.5V Supply 2.3V-5.5V Supply Output 0.47H 0.47H Output LX LX VIN VIN CSS 4.7F SC21154 10F 4.7F SC21154 10F SS FB SS FB CSS CSS EN EN GND GND EN EN Rev 1.0 2015 Semtech Corporation 1SC21154 Ordering Information (3) Options (1)(2) Device Package (3) (3) Output Output Discharge SC21154AULTRC Adjustable Automatic 1.5mm x 2mm 6-Lead MLPD SC21154EVB Evaluation Board 1.5mm x 2.0mm 6-Lead MLPD Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. (2) Lead-free packaging only. Device is WEEE and RoHS compliant and halogen-free. (3) For other device options not shown contact Semtech Marketing. The following options can be made available: VOUT options : adustable and fixed output voltage from 0.8V to 3.6V in 50mV increments. Output Discharge options: Automatic Discharge and No Discharge. Frequency: The default operating frequency is 4MHz with options of 2.2MHz, 3MHz, or 6MHz. Pin Configuration Marking Information TO P V IE W 1 6 TO P V IE W R TA 2 5 1.5x2.0 (m m ) 6-Lead M LP D 6-Lead M LP D 1.5x2.0 (m m ) oyw 3 4 Pin Assignments 6-Lead MLPD Pin Name 1 VIN 1.5x2.0 (mm) 6-Lead MLPD Marking Diagram 2 SS RTA = Device Marking Code 3 EN oyw = Pin 1 Indicator and Date Code 4 FB 5 GND 6 LX PAD PAD 2