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3V-28V Input, Hysteretic Synchronous Step-Down Controller
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The MP2905 is a hysteretic voltage-mode control, synchronous PWM buck controller. The output voltage can be regulated from 0.6V to 0.9*VIN. It achieves high output current over a wide input supply range from 3V-28V. MP2905 integrates an internal LDO regulator that makes the controller function at a wide input supply. Hysteretic voltage-mode control provides fast transient response without additional loop compensation. An adjustable soft-start prevents inrush current at turn-on. The device senses high-side switch voltage drop for hiccup current limit and short current protection. The frequency is adjustable from 200kHz to 500kHz. The MP2905 is available in 10-pin MSOP package, provides a very compact system solution with minimal reliance on external components.
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Features & Benefits
- Wide 3V to 28V Operating Input Range
- Output Adjustable from 0.6V to 0.9*Vin
- Switching frequency from 200kHz to 500kHz
- Programmable Soft-Start
- Hiccup current limit
- Lossless peak current sensing
- MSOP-10 package
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The EV2905A-K-01A is the evaluation board for the MP2905AEK, a hysteretic synchronous step-down controller. It offers a very compact solution to achieve 1.2V, 10A continuous output current from a 10.8V to 13.2V input voltage range over a wide operation input voltage. An adjustable soft-start prevents inrush current at turn-on.
Hysteretic voltage control can provide fast transient without any loop compensation. Full protection features include OCP, output OVP, thermal shut down.
The EV2905A-K-01A frequency is approximately 300kHz (12V input). Peak Current limit is set at 15A. The efficiency is up to 90% (12V input) with the supplied components.