LMZ10503EXTEVAL: 2.5V @ 3A, 2.95 ~ 5.5V in

Summary

The LMZ10503EXT SIMPLE SWITCHER® power module operates from -55°C ~ 125°C and is a complete, easy-to-use DC-DC solution capable of driving up to 3A load. It has exceptional power conversion efficiency, output voltage accuracy, line and load regulation.

The LMZ10503EXT is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ10503EXT can accept an input voltage rail between 2.95V and 5.5V and deliver an adjustable and highly accurate output voltage as low as 0.8V. 1 MHz fixed frequency PWM switching provides a predictable EMI characteristic. Two external compensation components can be adjusted to set the fastest response time, while allowing the option to use ceramic and/or electrolytic output capacitors. Externally programmable soft-start capacitor facilitates controlled startup.

The LMZ10503EXT is a reliable and robust solution with the following features: lossless cycle-by-cycle peak current limit to protect for over current or short-circuit fault, thermal shutdown, input under-voltage lock-out, and pre-biased startup.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	296-52436-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	2.5 V
Current Out	3 A
Voltage In	2.95 ~ 5.5 V
Efficiency @ Conditions	>93%, 5V in, 2.5V @ 0.4 ~ 3 A >92%, 3.3V in, 2.5V @ 0.2 ~ 3 A
Voltage Out Range	0.9 ~ 3.3 V
Features	Current Limit (Adj. or Fixed) Over Current Protection Short Circuit Protection Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	1 MHz
Standby Current [Typical]	260 µA
Quiescent Current [Typical]	1.7 mA
Component Count + Extras	14 + 6
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	FPGA / DSP / Processors Medical Point of Load (PoL) RF / Wireless
Standby Current [Maximum]	500 µA
Quiescent Current [Maximum]	3 mA
Main I.C. Base Part	LMZ10503EXT
Date Created By Author
Date Added To Library	2011-03