2745_LM3671: 3V @ 600mA, 3.5 ~ 5.5V in

Summary

This 3.3V Buck Converter board is great for supplying power to low voltage circuits from a single Li-Ion cell battery or USB power. The LM3671 provides up to 600-mA load current across the entire input voltage range of 3.5 to 5.5V. Great for your portable project, we made this "pin compatible" with the LM1117-3.3V TO-220 chip so you can swap it in for better performance (90-95% efficiency!) There's also an ENable pin, tie it low to shut down the output completely.

Automatic intelligent switching between PWM lownoiseand PFM low-current mode offers improved system control. During PWM mode, the device operates at a fixed-frequency of 2 MHz. Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typical) during light load and standby operation. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

Only Three External Components Required (One Inductor, Two Ceramic Capacitors)
Board Dimensions: 16mm x 10mm x 3mm / 0.6" x 0.4" x 0.1"

Specifications

Manufacturer	Adafruit Industries LLC
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	1528-1430-ND
Eval Board Supplier	Adafruit Industries LLC
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	3.3 V
Current Out	600 mA
Voltage In	3.5 ~ 5.5 V
Efficiency @ Conditions	>95%, 4.5V in, 3.3V @ 100 ~ 300 mA >95%, 3.6V in, 3.3V @ 70 ~ 300 mA >92%, 4.5V in, 3.3V @ 40 ~ 600 mA >90%, 5V in, 3.3V @ 70 ~ 600 mA >90%, 3.6V in, 3.3V @ 0.8 ~ 600 mA
Voltage Out Range	- Fixed
Features	Current Limit (Adj. or Fixed) Over Current Protection Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	2 MHz
Standby Current [Typical]	10 nA
Quiescent Current [Typical]	16 µA
Component Count + Extras	4 + 1
Internal Switch	Yes
Design Author	Adafruit
Application / Target Market	Audio: MP3 Players Automotive Cell Phones Digital Cameras Medical Point of Load (PoL) Portable Devices RF: Home Automation USB Powered Devices
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part	LM3671
Date Created By Author
Date Added To Library	2018-06