LMZ21700EVM: 3.3V @ 650mA, 5 ~ 17V in, Buck

Summary

The LMZ21701 and LMZ21700 SIMPLE SWITCHER® nano modules are easy-to-use DC-DC solutions optimized for space constrained applications. The LMZ21701 is capable of driving up to 1A load with excellent power conversion efficiency, output voltage accuracy, line and load regulation and load transient response. The LMZ21700 is a 650 mA load current version module, pin-to-pin compatible with the LMZ21701.

The evaluation board is configured for 3.3V output voltage from 5V to 17V input. The resistor voltage divider RFBT and RFBB set the output voltage. The external capacitor CSS sets the soft start time for VOUT. See the datasheet for component selection and device details. The board features turret terminals for easy connection to input supply, load, EN input, as well as soft start voltage and Power Good flag monitoring.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	296-38673-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	3.3 V
Current Out	650 mA
Voltage In	5 ~ 17 V
Efficiency @ Conditions	>90%, 9V in, 3.3V @ 425 ~ 650 mA >90%, 5V in, 3.3V @ 150 ~ 650 mA >90%, 4.5V in, 3.3V @ 100 ~ 650 mA >85%, 12V in, 3.3V @ 350 ~ 650 mA >80%, 17V in, 3.3V @ 350 ~ 650 mA >80%, 15V in, 3.3V @ 100 ~ 650 mA
Voltage Out Range	0.9 ~ 6 V
Features	Current Limit (Adj. or Fixed) Internal Inductor Power Good Output Power Save Mode Pre-Biased Startup Shutdown, Enable, Standby Soft Start
Switching Frequency
Standby Current [Typical]	1.5 µA
Quiescent Current [Typical]	17 µA
Component Count + Extras	8 + 11
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	Point of Load (PoL) Portable Devices
Standby Current [Maximum]	4 µA
Quiescent Current [Maximum]	25 µA
Main I.C. Base Part	LMZ21700
Date Created By Author	2014-04
Date Added To Library	2015-06