LM20143EVAL: 1.2V @ 3A, 2.95 ~ 5.5V in, 82%

Summary

The Eval Board is set at 1.2V but can be changed by swapping one of the feedback resistors.

The LM20143 is a full featured buck switching regulator capable of driving up to 3A of load current. The switching frequency of the LM20143 can be varied from 500kHz to 1.5Mhz with an external resistor allowing the size of the power stage components to be reduced while still providing efficient operation.

The LM20143 is capable of converting an input voltage between 2.95V and 5.5V down to an output voltage as low as 0.8V. Fault protection features include cycle-by-cycle current limit, output power good, and output over-voltage protection.

The dual function soft-start/tracking pin can be used to control the startup response of the LM20143, and the precision enable pin can be used to easily sequence the LM20143 in applications with sequencing requirements. The LM20143 is available in an eTSSOP-16 package with an exposed pad for enhanced thermal performance.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	LM20143EVAL-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1.2 V
Current Out	3 A
Voltage In	2.95 ~ 5.5 V
Efficiency @ Conditions	>85%, 3.3V in, 1.2V @ 0.3 ~ 2.5 A >82%, 5V in, 1.2V @ 500 mA ~ 3 A
Voltage Out Range	0.8 ~ 3.3 V
Features	Current Limit (Adj. or Fixed) Over Current Protection Over Voltage Protection Power Good Output Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	500 kHz ~ 1.5 MHz
Standby Current [Typical]	90 µA
Quiescent Current [Typical]	3.5 mA
Component Count + Extras	15 + 7
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	Computers FPGA / DSP / Processors Point of Load (PoL)
Standby Current [Maximum]	180 µA
Quiescent Current [Maximum]	6 mA
Main I.C. Base Part	LM20143
Date Created By Author
Date Added To Library	2011-03