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LM43601
SNVSA44...
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Technical Documents
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Reference Design
LM43601
SNVSA44B – AUGUST 2014 – REVISED JANUARY 2018
LM43601 3.5-V to 36-V, 1-A Synchronous Step-Down
Voltage Converter
1 Features
1 33-µA Quiescent Current in Regulation High Efficiency at Light Load (DCM and PFM) Meets EN55022/CISPR 22 EMI Standards Integrated Synchronous Rectification Adjustable Frequency Range: 200 kHz to 2.2 MHz
(500 kHz default) Frequency Synchronization to External Clock Internal Compensation Stable With Almost Any Combination of Ceramic,
Polymer, Tantalum, and Aluminum
Capacitors Power-Good Flag Soft Start into Pre-Biased Load Internal Soft Start: 4.1 ms Extendable Soft-Start Time by External Capacitor Output
Voltage Tracking Capability Precision Enable to Program System UVLO Output Short-Circuit Protection With Hiccup Mode Overtemperature Thermal Shutdown Protection Create a Custom Design Using the LM43601 With
the WEBENCH® Power Designer
2 Applications
Industrial Power Supplies Telecommunications Systems Sub-AM Band Automotive General Purpose Wide VIN Regulation High Efficiency Point-Of-Load Regulation
Simplified Schematic
VIN CIN
VIN SW LM43601
ENABLE PGOOD SS/TRK RT SYNC
AGND
CBOOT BIAS
FB VCC PGND
L CBOOT
COUT
VOUT
CBIAS
CFF
RFBT
CVCC
RFBB
Copyright © 2018, Texas Instruments Incorporated
3 Description
The LM43601 regulator is an easy to use synchronous step-down DC-DC converter capabl...