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Manufacturer Part #


MIC3838 Series 20 mA 1 MHz SMT Flexible Push-Pull PWM Controller - MSOP-10

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Mfr. Name: Microchip
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Product Specification Section
Technical Attributes
Attributes Table
Supply Current-Max: 20mA
Supply Voltage: 2V to 14V
Frequency-Max: 1MHz
Duty Cycle-Min: 0%
Duty Cycle-Max: 50%
Operating Temp Range: -40°C to +85°C
Package Style:  MSOP-10
Mounting Method: Surface Mount
Features & Applications

The MIC3839YMM is a family of complementary output push-pull PWM control ICs that feature high speed and low power consumption. The MIC3839YMM is ideal for telecom level (36 V to 75 V) isolated step down dc/dc conversion applications where high output current, small size, and high efficiency are required

The MIC3839YMM is designed for high flexibility with minimum pin-count. The devices are easily configurable for either voltage-mode or current-mode control. Additionally, the MIC3838/9 can easily implement a volt-second clamp that automatically limits the duty cycle during input transients, allowing designers to use the smallest possible transformers and power components. A 3 V reference output is also available that eliminates the need for an external reference. The dual-ended push-pull architecture of the MIC3838/9 allows more efficient utilization of the transformer than single-ended topologies, allowing smaller size dc/dc solutions. Additionally, the out-of-phase push-pull topology allows a higher effective duty cycle, reducing input and output ripple as well as stress on the external components. The dead-time between the two outputs is adjustable between 60 ns to 200 ns, limiting the duty cycle of each output stage to less than 50%. The MIC3838 has a turn-on threshold of 12.5 V whereas the MIC3839 has a lower turn-on threshold of 4.3 V. Both devices are available in a small size MSOP-10 package with an operating range of –40°C to +85°C.

Key Features:

  • Dual output drive stages in push-pull configuration.
  • Configurable for current-mode or voltage-mode control.
  • Easily implements volt-second clamp.
  • Leading edge current-sense blanking.
  • 3 V reference output available.
  • 130 µA typical start-up current.
  • 1 mA typical run current.
  • Operation to 1 MHz.
  • On-chip error amplifier with 4 MHz gain bandwidth product.
  • Internal soft start.
  • On-chip VDD clamping.
  • Output drive stages capable of 500 mA peak source current, 1 A peak sink current.


  • High efficiency “brick” power supply modules.
    • Half bridge converters.
    • Full bridge converters.
    • Push-pull converters.
    • Voltage-fed push-pull converters.
  • Telecom equipment and power supplies.
  • Networking power supplies.
  • Industrial power supplies.
  • 42 V automotive power supplies.
  • Base stations.
Pricing Section
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Factory Lead Time:
52 Weeks
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