MIC22400

The Micrel MIC22400 is a high-efficiency, 4A integrated switch synchronous buck (step-down) regulator. The MIC22400 is optimized for highest efficiency, achieving over 90% efficiency while still switching at 1MHz over a broad load range. The ultra-high-speed control loop keeps the output voltage within regulation even under extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage can be adjusted down to 0.7V to address all low-voltage power needs. The MIC22400 gives a full range of sequencing and tracking options. The EN/DLY pin combined with the Power-On-Reset (POR) pin allows multiple outputs to be sequenced in any way on turn-on and turn-off. The Ramp Control™ (RC) pin allows the device to be connected to another MIC22400 family of products to keep the output voltages within a certain ∆V on start-up.

The MIC22400 is available in a 20-pin 3mm x 4mm MLF® and thermally-enhanced 20-pin ePad TSSOP with a junction operating range from -40°C to +125°C.

Features
  • Input voltage range: 2.6V to 5.5V
  • Output voltage adjustable down to 0.7V
  • Output current up to 4A
  • Full sequencing and tracking ability
  • Power-On-Reset (POR)
  • Efficiency > 90% across a broad load range
  • Programmable frequency 300kHz to 4MHz
  • Easy Ramp Control™ (RC) compensation
  • Ultra-fast transient response
  • 100% maximum duty cycle
  • Fully-integrated MOSFET switches
  • Micropower shutdown
  • Thermal-shutdown and current limit protection
  • 20-pin 3mm x 4mm MLF®
  • 20-pin ePad TSSOP
  • -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) 2.6 2.6
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
Documents
MIC22400 - 4A Integrated Switch Synch Buck Regulator with Freq Prog up to 4MHzData Sheets11/05/20151661KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC22400YML-TR20VQFN-40C to +125CT/R1.521.271.151.111.10
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC22400YTSE0.20513520TSSOP4.4mmMatte Tine3
MIC22400YTSE-TR0.28067620TSSOP4.4mmMatte Tine3
MIC22400YML-TR0.66430220VQFN4x3x0.9mmNiPdAue4
MIC22400 - 4A Integrated Switch Synch Buck Regulator with Freq Prog up to 4MHz MIC22400
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