LTC3890-1 Datasheet 2-phase Synchronous Step-down DC/dc Controller

Manufacturer: Linear Technology (now Analog Devices)

Datasheet Details

Part number	LTC3890-1
Manufacturer	Linear Technology (now Analog Devices)
File Size	857.09 KB
Description	2-Phase Synchronous Step-Down DC/DC Controller
Datasheet	LTC3890-1-Linear.pdf

General Description

The LTC®3890-1 is a high performance dual step-down switching regulator DC/DC controller that drives all N-channel synchronous power MOSFET stages.

A constant frequency current mode architecture allows a phaselockable frequency of up to 850kHz.

Power loss and supply noise are minimized by operating the two controller output stages out-of-phase.

Key Features

n Wide VIN Range: 4V to 60V (65V Abs Max) n Low Operating IQ: 50µA (One Channel On) n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V n RSENSE or DCR Current Sensing n Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n Phase-Lockable Frequency (75kHz to 850kHz) n Programmable Fixed Frequency (50kHz to 900kHz) n Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads n Very Low Dropout Operation: 99% Duty Cycle n Adj.

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