LM20133EVAL: 1.2V @ 3A, 2.95 ~ 5.5 Vin

Summary

The LM20133 is a full featured buck switching regulator capable of driving up to 3A of load current. This device features a clock synchronization input that allows the switching frequency to be synchronized to an external clock source.

The LM20133 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 LM20133, and the precision enable pin can be used to easily sequence the LM20133 in applications with sequencing requirements.

The LM20133 evaluation board has been designed to balance overall solution size with the efficiency of the regulator. The evaluation board measures just under 1.3” x 1.1” on a two layer PCB, with all components placed on the top layer.

The power stage and compensation components of the LM20133 evaluation board have been optimized for an input voltage of 5V, but for testing purposes, the input can be varied across the entire operating range. The output voltage of the evaluation board is nominally 1.2V, but this voltage can be easily changed by replacing one of the feedback resistors.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	LM20133EVAL-ND
Eval Board Supplier	Texas Instruments
Eval Board	Board not Stocked
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	>87%, 5V in, 1.2V @ 0.5 ~ 3 A >87%, 3.3V in, 1.2V @ 0.25 ~ 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 Synchronizable Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	400 kHz
Standby Current [Typical]	3.5 µA
Quiescent Current [Typical]	90 mA
Component Count + Extras	14 + 8
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	FPGA / DSP / Processors Point of Load (PoL) Telecom
Standby Current [Maximum]	6 µA
Quiescent Current [Maximum]	180 mA
Main I.C. Base Part	LM20133
Date Created By Author
Date Added To Library	2024-01