MIC22205

The Micrel MIC22205 is a high-efficiency, 2A, integrated switch, synchronous buck (step-down) regulator. The MIC22205 is optimized for highest efficiency, achieving more than 95% efficiency while still switching at 1MHz. The ultra-high speed control loop keeps the output voltage within regulation even under the extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage is pre-bias safe and can be adjusted down to 0.7V to address all low-voltage power needs.

The MIC22205 offers a full range of sequencing and tracking options. The Enable/Delay (EN/DLY) pin, combined with the Power Good (PG) pin, allows multiple outputs to be sequenced in any way during turn-on and turn-off. The Ramp Control™ (RC) pin allows the device to be connected to another product in the MIC22xxx and/or MIC68xxx family, to keep the output voltages within a certain ∆V on start-up.

The MIC22205 is available in a 12-pin 3mm x 3mm MLF® with a junction operating range from -40°C to +125°C.

Features
  • Input voltage range: 2.9V to 5.5V
  • Output voltage adjustable down to 0.7V
  • Output load current up to 2A
  • Safe start-up into a pre-biased output
  • Full sequencing and tracking capability
  • Power Good (PG) output
  • Efficiency >95% across a broad load range
  • Programmable frequency 300kHz to 4MHz
  • Ultra-fast transient response
  • Easy RC compensation
  • 100% maximum duty cycle
  • Fully-integrated MOSFET switches
  • Thermal-shutdown and current-limit protection
  • 12-pin 3mm x 3mm MLF®
  • -40°C to +125°C junction temperature range
Parameter
Parameter Name Value Value
Regulator Type Step Down (Buck) Step Down (Buck)
# of Outputs 1 1
Input Voltage Range Min (V) 2.9 2.9
Input Voltage Range Max (V) 5.5 5.5
Output Voltage Range Min (V) 0.7 0.7
Output Voltage Range Max (V) 5.5 5.5
Output Current (A) max 2 2
Quiescent Current (mA) typ 1.2 1.2
Synchronous Rectifier Yes Yes
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 0.7 0.7
Duty Cycle Max (%) 1 1
SHUTDOWN Current (µA) (Typ) 3.7 3.7
Documents
MIC22205 - 2A Integrated Switch High-Efficiency Synchronous Buck RegData Sheets11/05/20151670KB
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC22205YML-TR0.64430212VDFN3x3x0.9mmNiPdAue4
MIC22205 - 2A Integrated Switch High-Efficiency Synchronous Buck Reg MIC22205