LM22677EVAL: 3.3V @ 5A, 4.5 ~ 42Vin

Summary

The LM22677 evaluation board is designed to demonstrate the capabilities of the LM22677 switching regulator. The LM22677 evaluation board is configured to provide an output voltage of 3.3V up to 5A load current with an input voltage range of 4.5V to 42V.

Due to the low RDS(ON) of the integrated N-channel MOSFET and maximum duty-cycle limitations, the minimum input voltage of 4.5V will only provide a 3.3V output voltage for load currents up to 500 mA. At 5.5V input voltage 3A of output current is possible while maintaining 3.3V of output voltage. For load currents higher than 3A, in input voltage of 6.5V or higher is required. The typical operating frequency is 500 kHz. The evaluation board is designed to operate at ambient temperatures up to 30°C.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	LM22677EVAL/NOPB-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	5 A
Voltage In	4.5 ~ 42 V
Efficiency @ Conditions	>78%, 5.5V in, 3.3V @ 1 ~ 5 A >78%, 12V in, 3.3V @ 1 ~ 5 A >76%, 24V in, 3.3V @ 1 ~ 5 A >72%, 40V in, 3.3V @ 1 ~ 5 A
Voltage Out Range	1.285 ~ 37 V
Features	Current Limit (Adj. or Fixed) Shutdown, Enable, Standby Soft Start Synchronizable Thermal Protection
Switching Frequency	500 kHz
Standby Current [Typical]	25 µA
Quiescent Current [Typical]	3.4 mA
Component Count + Extras	9 + 4
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	Automotive Point of Load (PoL) Telecom
Standby Current [Maximum]	40 µA
Quiescent Current [Maximum]	6 mA
Main I.C. Base Part	LM22677
Date Created By Author
Date Added To Library	2011-03