AP3428DNTR-G1

The AP3428/A is a 1A 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 AP3428/A supports a range of input voltages from 2.5V 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 AP3428/A 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 AP3428/A delivers 1A maximum output current while consuming
only 40μA of no-load quiescent current. Ultra-low RDS(ON) integrated
MOSFETs and 100% duty cycle operation make the AP3428/A 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 AP3428/A is available in TSOT25, TSOT25 (Type SM), UDFN2020-6 (Type J) packages.