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

Overview

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.

  • 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 no sense resistor