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reference designSC21150ACSTRT

Semtech SC21150ACSTRT

Tiny 1.2A Synchronous Buck Regulator

Overview

TopologyOther Topology
Switching frequency3600-4400 kHz
IC revision1.0

Description

Project: SC21150 WLCSP EVBSemtech IC: SC21150ACSTRTApplication: Power applicationDFE201610P-R47M-P2 (1206 0.47uH)The SC211 50 is an ultra high efficiency 1.2A DC/DC buckregulator available in a tiny CSP package. These featuresmake the SC211 50 family perfect for small form factorportable applications where long battery life is essential.SC211 50 is an Adaptive On-Time 4MHz switching regulatorat full load conditions. Under light load conditions itseamlessly transitions into Power Save Mode and reducesswitching frequency thus saving energy. High switchingfrequency operation allows the use of a very small 0.47μHinductor along with small input and output capacitors tominimize overall circuit size. A Forced PWM input allowscontinuous switching under all load conditions.The SC211 50 is highly configurable with a wide range offactory options including internal Soft Start time, fixed oradjustable output voltage, automatic output discharge,and a Forced PWM input.The SC211 50 is offered in an ultra small WLCSP 6-Bump0.75mm x1.11 mm package with a bump pitch of 0.35mm.The SC211 50 operating temperature range is -40C to+85C.

Features

Remarks- BOM is added with Main pdf

Input voltage range — 2.3V to 5.5V1.2A continuous output current4MHz switching frequencyAdjustable Output Voltage0.8V to VIN1% 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 75mA1μA shutdown current23μA quiescent currentPre-bias startup protectionInternal or optional external Soft StartDevice options (contact Semtech Marketing)Automatic output dischargePower Good indicatorInternal Soft StartExternal Programmable Soft StartForced PWM Operation Input0.75mm x 1.11mm, 6-Bump WLCSP PackageWEEE and RoHS compliant and halogen-free

Typical applications

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

More information

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT1(A)
ISAT2(A)
RDC max.(mΩ)
fres(MHz)
SW(mm)
L(mm)
Ti
Samples
74479276147
WE-PMCI Power Molded Chip Inductor, 0.47 µH, 5.4 A
Simu­lation
Downloads10 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

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ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
Inductance0.47 µH
Rated Current5.4 A
Saturation Current 12.95 A
Saturation Current 26.3 A
DC Resistance30 mΩ
Self Resonant Frequency165 MHz
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Length2 mm
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970160365
WA-SPAII Plastic Spacer Stud, metric, internal/ internal, –, –
Simu­lation–
Downloads3 files

CAD files ZIP

Download all 3 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWA-SPAII Plastic Spacer Stud, metric, internal/ internal
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SW6 mm
Length16 mm
Inner ThreadM3