MIC22405

The Micrel MIC22405 is a high efficiency, 4A integrated switch synchronous buck (step-down) regulator. The MIC22405 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 MIC22405 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 MIC22405 is available in a 20-pin 3mm x 4mm MLF® with a junction operating range from -40°C to +125°C.

产品特性
  • Input voltage range: 2.9V to 5.5V
  • Output voltage adjustable down to 0.7V
  • Output load current up to 4A
  • Safe start-up into a pre-biased output
  • Full sequencing and tracking capability
  • Power Good 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
  • 20-pin 3mm x 4mm MLF®
  • -40°C to +125°C junction temperature range
技术参数
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 4 4
Quiescent Current (mA) typ 1.3 1.3
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) 5 5
文档资料
MIC22405 - 4A Integrated Switch High-Eff Synch Buck Regulator with Freq ProgData Sheets11/05/20151725KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC22405YML-TR20VQFN-40C to +125CT/R2.201.841.671.611.60
相关开发工具
器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC22405YML-TR0.66430220VQFN4x3x0.9mmNiPdAue4
MIC22405 - 4A Integrated Switch High-Eff Synch Buck Regulator with Freq Prog MIC22405