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Manufacturer Part #


MIC2238 Series 2.875 MHz 800mA Dual Synchronous Step-Down DC/DC Regulator-MLF-12

Mfr. Name: Microchip
Standard Pkg:
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Product Specification Section
Technical Attributes
Attributes Table
Topology: Buck
Input Voltage: 2.5V to 5.5V
Output Current-Max: 800mA
Output Type: Fixed
Switching Frequency-Max: 2.875MHz
Operating Temp Range: -40°C to +125°C
Duty Cycle-Max: 100%
No. of Outputs: 2
Quiescent Current: 28µA
Storage Temperature Range: -65°C to +150°C
Package Style:  MLF-12
Mounting Method: Surface Mount
Features & Applications
The MIC2238-J4YML TR is dual output, High-efficiency synchronous step-down DC/DC converter. The MIC2238 is ideally suited for portable systems which demand high power conversion efficiencies while offered in a very small package. The MIC2238 offers an ultra-low quiescent current in light load mode assuring minimum current draw from battery powered applications in standby modes.

The MIC2238 features a selectable mode that allows the user to trade-off lowest noise performance for low power efficiency. Trickle mode operation provides ultra-high efficiency at light loads, while PWM operation provides very low ripple noise performance. To maximize battery life in low-dropout conditions, MIC2238 can operate with a maximum duty cycle of 100%.


  • High Efficiency: Up to 95%
  • Ultra-low quiescent current: Only 28 µA
  • Ultra-low shutdown current less than 1 µA
  • 2.5 MHz PWM operation
  • High output current capability per channel: 800mA
  • No Schottky Diodes Required
  • Stable with 2.2 µH inductor, 2.2 µF ceramic capacitor
  • Adjustable output voltage down to 0.8 V
  • Built-in soft-start circuitry
  • Current limit protection
  • Automatic switching into light load mode operation
  • FPWM pin allows low noise all-PWM mode operation
  • Power good output with internal 5 µA current source allows sequencing with programmable delay time
  • Small Thermally Enhanced 3 mm × 3 mm MLF ® package


  • Cellular phones
  • PDAs
  • Digital cameras
  • MP3 players
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Factory Lead Time:
8 Weeks
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