AP3401
1.5MHZ, 1A STEP-DOWN DC - DC BUCK CONVERTER
Description
Pin Assignments
(Top View)
NEW PRODUCT
The AP3401 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.
Pin 1 Mark
The AP3401 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 AP3401 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.
EN
1
6
FB
GND
2
5
PG
LX
3
4
VIN
TSOT26
(Top View)
P in 1 Mark
The AP3401 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 AP3401 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.
EN
1
6
FB
PG
2
5
GND
VIN
3
4
LX
The AP3401 is available in TSOT26, U-DFN2020-6 (Type J)
packages.
U-DFN2020-6 (Type J)
Features
Output Current: Up to 1A
Output Voltage: 0.6V to VIN
Input Voltage: 2.5V to 5.5V
0.6V Reference Voltage With ±2% Precision
40µA (Typ) No Load Quiescent Current
Applications
Shutdown Current:
