Micrel, Inc. Supplier Page

MIC2174 Buck Controller

Micrel, Inc. and Digi-Key introduce adaptive on-time control regulators

Micrel, Inc.'s MIC2174 is a synchronous, digitally modified, constant on-time pulse-width modulation (PWM) buck controller. These controllers are targeted for cost sensitive applications requiring high performance such as set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipments.
The MIC2174 operates over an input supply range of 3V to 40V, and is independent of the IC supply voltage. The MIC2174 operates at a fixed frequency of 300kHz and is capable of supplying 25A output current. The output voltage is adjustable from 0.8V to 0.86V IN.
A unique Hyper Speed Control ™ architecture allows for ultra fast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible.
MIC2174 Buck Controller

  • 3V to 40V input voltage
  • 25A output current capability
  • 300kHz switching frequency
  • Constant on-time mode control
  • Output down to 0.8V with ± 1% FB accuracy
  • Up to 94% efficiency
  • Foldback current limit and “hiccup” mode short-circuit protection
  • All N-Channel MOSFET design
  • No current-sense resistor needed
  • 6ms Internal soft start

Digi-Key Part Number Manufacturer Part Number Description Package Type Datasheet
576-3546-5-ND MIC2174-1YMM IC Buck Sync Adj 25A 10MSOP 10-Pin MSOP Datasheet

*Click here for MIC2174 Diagram