LM20144MH

• The input voltage range is 2.95V to 5.5V
• Precise current limiting minimizes inductor size
• 97% peak efficiency
• Adjustable switching frequency (500 kHz - 1.5 MHz)
• 32mΩ integrated FET switch
• Start into a pre-biased load
• Output voltage tracking
• Peak current mode control
• Adjustable output voltage as low as 0.8V
• Adjustable soft-start with external capacitors
• Precision enable pins and hysteresis
• Integrated OVP, UVLO, good power and thermal shutdown
• eTSSOP - 16 bare pad package

illustrate

The LM20144 is a full-featured, tunable frequency synchronous buck regulator that provides up to 4A of continuous output current capability. Loop compensation is controlled in current mode and is stable with almost any type of output capacitor. In most cases, only two external elements are required for the compensation unit, providing maximum flexibility and ease of use. The device is optimized to operate over an input voltage range of 2.95V to 5.5V, making it a variable non-adaptation for a low-voltage system.

The device features overvoltage protection (OVP) and overcurrent protection (OCP) inside the circuit to improve system reliability. A high-precision enable pin and integrated UVLO allow tight control and sequencing equipment to be turned on. The starting inrush current limit is both internally fixed and externally adjustable soft-start circuitry. Fault detection and power sequencing are possible integrated power-good circuits.

The design of LM20144 works on the well-structured multi-rail power supply. The output voltage of the device can be set to a higher voltage rail tracking using SS/TRK pins. If the LM20144 output is in the startup pre-bias, the current will not be absorbed, and the output will be pulled low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The frequency of the device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor to ground the RT pin.

LM20144 comes in a 16-pin eTSSOP package with bare pads that can be soldered to printed circuit boards, eliminating the need for bulky heat sinks.

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• Simple design, high efficiency load regulation point from 5V or 3.3V bus
• High-performance DSPs, FPGAs, ASICs, and microprocessors
• broadband, optical communication networks and infrastructure