The LM3151MHE-3.3 is a SIMPLE SWITCHER? step down Power Controller capable of providing up to 12A of output current in a typical application. Operating with an input voltage range from 6 to 42V, it features a fixed output voltage of 3.3V and features switching frequency of 250kHz. The synchronous architecture provides for highly efficient designs. The controller employs a constant on-time (COT) architecture with a proprietary emulated ripple mode (ERM) control that allows for the use of low ESR output capacitors, which reduces overall solution size and output voltage ripple. The constant on-time (COT) regulation architecture allows for fast transient response and requires no loop compensation, which reduces external component count and reduces design complexity. Fault protection features such as thermal shutdown, under-voltage lockout, over-voltage protection, short-circuit protection, current limit and output voltage pre-bias startup allow for a reliable and robust solution.
- PowerWise? step-down controller
- No loop compensation required
- Fully WEBENCH? enabled
- Low external component count
- Constant on-time (COT) control
- Ultra-fast transient response
- Stable with low ESR capacitors
- Output voltage pre-bias startup
- Valley current limit
- Programmable soft-start
- Green product and no Sb/Br
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