The MIC2169ABMM is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2169ABMM allows compact DC/DC solutions with a minimal external component count and cost.
The MIC2169ABMM operates from a 3V to 14.5V input, without the need of any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all N-Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range.
The MIC2169ABMM senses current across the high-side N-Channel MOSFET, eliminating the need for an expensive and lossy current-sense resistor. Current limit accuracy is maintained by a positive temperature coefficient that tracks the increasing RDS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting digital soft-start.
The MIC2169ABMM is available in a 10-pin MSOP package, with a wide junction operating range of -40°C to +125°C.
Feature
- 3V to 14.5V input voltage range
- Adjustable output voltage down to 0.8V
- Up to 95% efficiency
- 500kHz PWM operation
- Adjustable current limit senses high-side N-Channel MOSFET current
- No external current-sense resistor
- Adaptive gate drive increases efficiency
- Fast transient response
- Externally compensated
- Overvoltage protection protects the load in fault conditions
- Dual mode current limit speeds up recovery time
- "Hiccup" mode short-circuit protection
- Small size MSOP 10-lead package
