MIC4742

The Micrel MIC4742 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output. The MIC4742 operates at 2MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz.

The low on-resistance internal P-channel MOSFET of the MIC4742 allows efficiencies over 92%, reduces external components count and eliminates the need for an expensive current sense resistor.

The MIC4742 operates from 2.9V to 5.5V input and the output can be adjusted down to 0.6V. The device can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

The MIC4742 is available in the exposed pad 16-pin 3mm x 3mm MLF® and ETSSOP-16 packages with a junction operating range from –40°C to +125°C.

Features
  • 2.9V to 5.5V supply voltage
  • 2MHz PWM mode
  • 2A Dual output
  • Greater than 92% efficiency
  • 100% maximum duty cycle
  • Adjustable output voltage option down to 0.6V
  • Ultra-fast transient response
  • Ultra-small external components Stable with a 1µH inductor and a 4.7µF output capacitor
  • Fully integrated 2A MOSFET switches
  • Micro-power shutdown
  • Thermal shutdown and current limit protection
  • Available in a 3mm x 3mm 16-pin MLF® and 16-pin TSSOP
  • -40°C to +125°C junction temperature range
Parameter
Parameter Name Value Value
Regulator Type Step Down (Buck) Step Down (Buck)
# of Outputs 2 2
Input Voltage Range Min (V) 2.9 2.9
Input Voltage Range Max (V) 5.5 5.5
Output Voltage Range Min (V) 0.6 0.6
Output Voltage Range Max (V) 5.5 5.5
Switching Frequency (kHz) 2000 2000
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 0.6 0.6
Duty Cycle Max (%) 1 1
SHUTDOWN Current (µA) (Typ) 1.6 1.6
Documents
MIC4742 Data SheetData Sheets11/05/2015590KB
MIC4742YTSE Evaluation BoardUser Guides11/11/2015196KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC4742YML-TR16VQFN-40C to +125CT/R2.642.202.001.931.91
MIC4742YTSE16TSSOP-40C to +125CTUBE**********
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC4742YTSE0.16351116TSSOP4.4mmMatte Tine3
MIC4742YTSE-TR0.23854816TSSOP4.4mmMatte Tine3
MIC4742YML-TR0.0213000.80170016VQFN3x3x0.9mmNiPdAue4
MIC4742 Data Sheet MIC4742
MIC4742YTSE Evaluation Board MIC4742