MIC4681

The MIC4681 SuperSwitcher™ is an easy-to-use step-down (buck) voltage-mode switching regulator. The 200kHz MIC4681 achieves over 1A of continuous output current over a 4V to 30V input range in an 8-lead SOP package . The MIC4681 features a high 2.1A minimum current limit, making the device ideal for pulsed current applications such as GSM and TDMA cell phone battery chargers and power supplies. The MIC4681 sustains an output of 4.2V/2A within a typical GSM charging environment.

The MIC4681 has an input voltage range of 4V to 30V, with excellent line, load, and transient response. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions. In shutdown mode, the regulator draws less than 6µA of standby current.

The MIC4681 SuperSwitcher™ regulator requires a minimum number of external components and can operate using a standard series of inductors and capacitors. Frequency compensation is provided internally for fast transient response and ease of use.

The MIC4681 is available in the 8-lead SOP with a -40°C to +125°C junction temperature range.

Features
  • SO-8 package with over 1A continuous output current
  • Capable of 2A pulse charging for GSM applications
  • All surface mount solution
  • Only 4 external components required
  • Fixed 200kHz operation
  • Output adjustable down to 1.25V
  • Internally compensated with fast transient response
  • Wide operating input voltage range: 4V to 30V
  • Less than 6µA typical shutdown-mode current
  • Up to 90% efficiency
  • Thermal shutdown
  • Overcurrent protection
Parameter
Parameter Name Value Value
Regulator Type Step Down (Buck) Step Down (Buck)
# of Outputs 1 1
Input Voltage Range Min (V) 4 4
Input Voltage Range Max (V) 30 30
Output Voltage Range Min (V) 1.25 1.25
Output Current (A) max 2 2
Quiescent Current (mA) typ 7 7
Switching Frequency (kHz) 400 400
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 1.25 1.25
Duty Cycle Max (%) 0.95 0.95
SHUTDOWN Current (µA) (Typ) 50 50
Documents
MIC4681 Data SheetData Sheets11/05/2015244KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC4681YM-TR8SOIC-40C to +125CT/R2.642.202.001.931.91
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC4681YM0.0780000.1808428SOIC3.9mmNiPdAue4
MIC4681YM-TR0.0780000.2384008SOIC3.9mmNiPdAue4
MIC4681 Data Sheet MIC4681