LM22680EVAL: 3.3V @ 2A, 4.5 ~ 42 Vin

Summary

The LM22680 evaluation board is designed to demonstrate the capabilities of the LM22680 switching regulator. The LM22680 is configured to provide an output voltage of 3.3V up to 2A 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. For load currents higher than 500 mA, an input voltage of 5.5V or higher is required. The typical operating frequency is 500 kHz. The evaluation board is designed to operate at ambient temperatures up to 65°C, and at steady state operating conditions.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	LM22680EVAL/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	2 A
Voltage In	4.5 ~ 42 V
Efficiency @ Conditions	>86%, 12V in, 3.3V @ 0.3 ~ 2 A >82%, 24V in, 3.3V @ 0.5 ~ 2 A >78%, 36V in, 3.3V @ 0.5 ~ 2 A
Voltage Out Range	1.285 ~ 37 V
Features	Current Limit (Adj. or Fixed) Shutdown, Enable, Standby Soft Start Synchronizable Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	500 kHz
Standby Current [Typical]	25 µA
Quiescent Current [Typical]	3.4 mA
Component Count + Extras	9 + 7
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	Automotive Computers Point of Load (PoL) Telecom
Standby Current [Maximum]	40 µA
Quiescent Current [Maximum]	6 mA
Main I.C. Base Part	LM22680
Date Created By Author
Date Added To Library	2011-03