MIC4744

The Micrel MIC4744 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output. The MIC4744 operates at 4MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz.

The low on-resistance internal P-Channel MOSFET of the MIC4744 allows efficiencies over 90%, reduces external components count and eliminates the need for an expensive current sense resistor.

The MIC4744 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 MIC4744 is available in the exposed pad 16-pin 3mm x 3mm MLF® and ETSSOP-16 packages with junction operating temperature ranging from –40°C to +125°C.

产品特性
  • 2.9V to 5.5V supply voltage
  • 4MHz PWM mode
  • 2A Dual output
  • Greater than 90% efficiency
  • 100% maximum duty cycle
  • Output voltage adjustable down to 0.6V
  • Ultra-fast transient response
  • Ultra-small external components Stable with a 0.47µH inductor and a 10µF output capacitor
  • Fully integrated 2A MOSFET switches
  • Micro-power shutdown
  • Thermal shutdown and current limit protection
  • Available in 3mm x 3mm 16-pin MLF® and 16-pin TSSOP packages
  • -40°C to +125°C junction temperature range
技术参数
aspxParamName aspxParamValue aspxParamValue
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) 4000 4000
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
文档资料
MIC4744 Data SheetData Sheets11/05/2015712KB
MIC4744YML Evaluation BoardUser Guides11/11/2015281KB
MIC4744YTSE Evaluation BoardUser Guides11/11/2015246KB
器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC4744YTSE-TR0.23854816TSSOP4.4mmMatte Tine3
MIC4744YTSE0.16351116TSSOP4.4mmMatte Tine3
MIC4744YML-TR0.0213000.80170016VQFN3x3x0.9mmNiPdAue4
MIC4744 Data Sheet MIC4744
MIC4744YML Evaluation Board MIC4744
MIC4744YTSE Evaluation Board MIC4744