Datasheet

LMZ10503EXT
SNVS668G –JUNE 2010–REVISED OCTOBER 2013 www.ti.com
DESCRIPTION
The LMZ10503EXT SIMPLE SWITCHER
®
power module is a complete, easy-to-use DC-DC solution capable of
driving up to a 3A load with 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. One megahertz 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.
System Performance
Current Derating (V
OUT
= 3.3V)
Figure 1.
Efficiency (V
OUT
= 3.3V)
Figure 2.
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