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MIC4681

200kHz 2A Peak SuperSwitcher™ Buck Regulator

Status: In Production

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
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

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.

Additional 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
Parametrics
Name
Value
Regulator Type
Step Down (Buck)
# of Outputs
1
Input Voltage Range Min (V)
4
Input Voltage Range Max (V)
30
Output Voltage Range Min (V)
1.25
Output Current (mA) max
2000
Quiescent Current (mA) typ
7
Switching Frequency (kHz)
200
Operating Temp Range
-40 to 125
Vfb (V)
1.25
Duty Cycle Max (%)
0.95
SHUTDOWN Current (µA) (Typ)
50

Documents

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Data Sheets

  
244KB

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC4681YM
0.078000
0.180842
8
SOIC
3.9mm
NiPdAu
e4
MIC4681YM-TR
0.078000
0.238400
8
SOIC
3.9mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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