AP3445/L
EVB User Guide
This EVB user guide contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
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www.diodes.com
October 2018
© Diodes Incorporated
AP3445/L EVB User Guide
AE Department
1.
AP3445/L Revision Information
Date
Revision
Description
Comment
2017/10
V1.0
Initial Release
2.
AP3445/L General Description
The AP3445/L is a 2A step-down DC-DC converter. At heavy load, the constant frequency PWM control
performs excellent stability and transient response. No external compensation components are required.
The AP3445/L supports a range of input voltages from 2.7V to 5.5V, allowing the use of a single Li+/Li-
polymer cell, multiple Alkaline/NiMH cell, and other standard power sources. The output voltage is
adjustable from 0.6V to the input voltage. The AP3445/L employs internal power switch and synchronous
rectifier to minimize external part count and realize high efficiency. During shutdown, the input is
disconnected from the output and the shutdown current is less than 1μA. Other key features include
over-temperature and short circuit protection, and under-voltage lockout to prevent deep battery discharge.
The AP3445/L delivers 2A maximum output current while consuming only 55μA of no-load quiescent
current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the AP3445/L an
ideal choice for high output voltage, high current applications which require a low dropout threshold.
Pulse skip mode allows to maintain high efficiency at light-load conditions.
The AP3445/L is available in TSOT23-6 package.
