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LT1432

Linear Technology
Part Number LT1432
Manufacturer Linear Technology
Description 5V High Efficiency Step-Down Switching Regulator Controller
Published Mar 22, 2005
Detailed Description LT1432 5V High Efficiency Step-Down Switching Regulator Controller FEATURES s s s s s s s s DESCRIPTIO Accurate Preset...
Datasheet PDF File LT1432 PDF File

LT1432
LT1432

Overview
LT1432 5V High Efficiency Step-Down Switching Regulator Controller FEATURES s s s s s s s s DESCRIPTIO Accurate Preset +5V Output Up to 90% Efficiency Optional Burst Mode for Light Loads Can be Used with Many LTC Switching ICs Accurate Ultra-Low-Loss Current Limit Operates with Inputs from 6V to 30V Shutdown Mode Draws Only 15µA Uses Small 50µH Inductor The LT1432 is a control chip designed to operate with the LT1170/LT1270 family of switching regulators to make a very high efficiency 5V step-down (buck) switching regulator.
A minimum of external components is needed.
Included is an accurate current limit which uses only 60mV sense voltage and uses “free” PC board trace material for the sense resistor.
Logic controlled electronic shutdown mode draws only 15µA battery current.
The switching regulator operates down to 6V input.
The LT1432 has a logic controlled “burst” mode to achieve high efficiency at very light load currents (0 to 100mA) such as memory keep-alive.
In normal switchi...


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