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MIC2129
  • MIC2129
  • MIC2129

MIC2129

In Production

The MIC2129 is a constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2129 operates over an input voltage range from 4.5V to 100V and can be used to supply load current up to 25A (Thermally Limited) . The output voltage is adjustable down to 0.6V with an accuracy of ±1%. The device operates with programmable switching frequency from 100kHz to 800kHz. The MIC2129 controller offers three selectable gate drive voltages (5.2V, 7.5V, 10.5V) to enable the use of logic level or standard FETS to ensure optimal efficiency. The high voltage bootstrap diode is also integrated in this controller saving overall solution size and cost. The other key features of the MIC2129 are remote sense, integrated bootstrap LDO's, adjustable soft start...

Microchip Technology MIC2129 Product Info

16 April 2026 0

Parameters

Input Voltage Max

100

Input Voltage Min

4.5

Output Voltage Min

0.6

Current Limit / Short Circuit Protection

Yes

Internal Compensation

Yes

PFM, Discontinuous, Hyperlight load, or Skip Mode

Yes

Package

24 pin QFN and TSSOP

Power Good Signal

Yes

Soft Start

Adjustable

Supported Outputs

1

Supported Topologies

Buck, COT

Typical Tolerance (%)

1

Accuracy (+/-) %

1

Adj Output Voltage (V)

0.6V to Dmax*VIN

DCDC Controller Type

Non-Isolat ed,Buck

Features

  • Enhanced COT Architecture
  • 4.5V to 100V input voltage
  • Adjustable output, 0.6V to Dmax*VIN
  • Adjustable soft start
  • Precision Enable input and power good output
  • Built-in 5.4V/7.5V/10.5V selectable LDO's
  • 100kHz to 800kHz programmable switching frequency
  • Programmable current limit, hiccup, latch-up, cycle by cycle mode protection
  • Selectable light load operating modes
  • Output Remote sense
  • Supports safe start-up into a pre-biased output
  • -40°C to +125°C junction temperature range
  • Adjustable positive and negative current limit threshold
  • Selectable current limit (Hiccup, Latch-up, Cycle-by-Cycle)
  • +/-1% Internal reference accuracy
  • Available in 24 pin QFN and TSSOP packages

    • Description

    The MIC2129 is a constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2129 operates over an input voltage range from 4.5V to 100V and can be used to supply load current up to 25A (Thermally Limited) . The output voltage is adjustable down to 0.6V with an accuracy of ±1%. The device operates with programmable switching frequency from 100kHz to 800kHz. The MIC2129 controller offers three selectable gate drive voltages (5.2V, 7.5V, 10.5V) to enable the use of logic level or standard FETS to ensure optimal efficiency. The high voltage bootstrap diode is also integrated in this controller saving overall solution size and cost. The other key features of the MIC2129 are remote sense, integrated bootstrap LDO's, adjustable soft start, selectable light load operating modes, precision enable, selectable current limit modes (Hiccup, Latch-up, Cycle by cycle), output OVP protection, Power Good and thermal shut down. The MIC2129 is offered in a 24 pin QFN and as well as TSSOP packages.

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