MIC2155 Datasheet PWM Synchronous Buck Controller

Manufacturer: Micrel Semiconductor

MIC2155 pwm synchronous buck controller by Micrel Semiconductor - Datasheet Preview

Datasheet Details

Part number	MIC2155
Manufacturer	Micrel Semiconductor
File Size	575.62 KB
Description	PWM Synchronous Buck Controller
Datasheet	MIC2155 Datasheet

General Description

The MIC2155 and MIC2156 are a family of two-phase, single-output synchronous buck control ICs featuring small size, high efficiency, and a high level of flexibility.

The ICs implement a 500kHz (MIC2155) and 300kHz (MIC2156) voltage mode PWM control, with the outputs switching 180° out of phase.

The result of the out-of-phase operation is 1MHz (or 600kHz) input ripple with ripple current cancellation, minimizing the required input filter capacitance.

Overview

MIC2155/2156 www.DataSheet4U.com Two-Phase, Single-Output, PWM Synchronous Buck Control IC.

Key Features

Synchronous buck control ICs with outputs switching 180° out-of-phase.
Remote sensing with internal differential amplifier.
4.5V to 14.5V input voltage range.
Adjustable output voltages down to 0.7V.
1% output voltage accuracy.
Starts up into a pre-biased output.
500kHz PWM operation (MIC2155).
300kHz PWM operation (MIC2156).
Adaptive gate drive allows efficiencies over 95%.
Adjustable current limit with n.

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