LTC3822 Synchronous Step-Down DC/DC Controller

Linear Technology

Description

LTC3822 No RSENSE™, Low Input Voltage, Synchronous Step-Down DC/DC Controller .
The LTC®3822 is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using few external components.

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Datasheet Specifications

Part number: LTC3822
Manufacturer: Linear Technology
File Size: 204.04 KB
Datasheet: LTC3822_LinearTechnology.pdf
Description: Synchronous Step-Down DC/DC Controller

Features

* n No Current Sense Resistor Required n All N-Channel MOSFET Synchronous Drive n High Current Outputs Possible n Constant Frequency Current Mode Operation for Excellent Line and Load Transient Response n VIN: 2.75V to 4.5V n ±1% 0.6V Reference n Low Dropout Operation: 99% Duty Cycle n Selectable Freq

Applications

* n 3.3VIN Systems n Li-Ion Battery Systems TYPICAL APPLICATION 1.8V/8A High Efﬁciency, 550kHz Step-Down Converter IPRG VIN RUN TG FREQ LTC3822 SW ITH 5.1k BOOST 680pF GND BG VFB 59k 118k 0.22μF FDS6898A 0.47μH VIN 2.75V TO 4.5V 47μF VOUT 1.8V 100μF 8A 3822 TA01 EFFICIENCY (%) Efﬁcie

LTC3822 Distributors

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LTC3822 Synchronous Step-Down Controller Linear Technology

Linear Technology LTC3822-like datasheet