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MIC2155 - PWM Synchronous Buck Controller

Datasheet Summary

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.

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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Datasheet preview – MIC2155

Datasheet Details

Part number MIC2155
Manufacturer Micrel Semiconductor
File Size 575.62 KB
Description PWM Synchronous Buck Controller
Datasheet download datasheet MIC2155 Datasheet
Additional preview pages of the MIC2155 datasheet.

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MIC2155/2156 www.DataSheet4U.com Two-Phase, Single-Output, PWM Synchronous Buck Control IC 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. A 1% output voltage tolerance allows the maximum level of system performance. Internal drivers with adaptive gate drive allow the highest efficiency with the minimum external components.
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