Micrel Distributor

Micrel MIC24085 Buck Regulators


18 V, 3 A, high-performance, integrated FET buck regulator from Micrel


Micrel's MIC24085 Buck RegulatorsThe Micrel MIC24085x family consists of a fixed-frequency, current-mode DC-DC converter with integrated power MOSFETs. The MIC24085x is optimized for +12 V rails and provides a flexible and cost-effective solution for distributed power systems and communication applications. The MIC24085A provides an adjustable output voltage from 0.9 V to 5.5 V; the MIC24085B/C/D/E/F provides fixed output voltages at 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5 V, respectively. The MIC24085 family of devices operates with an input voltage range of 4.5 V to 18 V and delivers 3 A of output current while operating at a fixed frequency of 1 MHz. Peak current mode architecture is used to provide fast transient response. At light load, the pulse frequency modulation (PFM) mode is used to boost overall efficiency.

The MIC24085 family improves system reliability by offering multiple protection features. These features include under-voltage lockout, internal soft start, cycle-by-cycle current limit, output overvoltage protection, and thermal shutdown. Other features include an enable input and a PG (Power Good) output. The MIC24085 family is available in a 16-pin 3 mm x 3 mm MLF package with a junction operating range from –40°C to +125°C. Datasheet

Features
  • 4.5 V to 18 V input voltage range
  • Requires no external compensation
  • 0.9 V to 5 V output voltage range
  • 1 MHz switching frequency reduces output filter size
  • 10 μA shutdown supply current meets energy start requirements
  • PFM mode light-load efficiency improvement
  • Cycle-by-cycle current limit
  • 3 mm x 3 mm QFN package
  • Output overvoltage protection
  • Thermal shutdown protection
  • Power Good (PG) output

Digi-Key P/N Manufacturer P/N Description
576-4448-1-ND MIC24085BYML TR IC REG BUCK SYNC 1.5V 3A 16QFN
576-4449-1-ND MIC24085DYML TR IC REG BUCK SYNC 2.5V 3A 16QFN
576-4450-1-ND MIC24085EYML TR IC REG BUCK SYNC 3.3V 3A 16QFN
576-4451-1-ND MIC24085FYML TR IC REG BUCK SYNC 5V 3A 16QFN
576-4447-1-ND MIC24085AYML TR IC REG BUCK SYNC ADJ 3A 16QFN