Diodes AP3432 - Manual (Page 5)

Data Sheet
1.5MHz, 2.5A, Step-down DC-DC Converter AP3432
Jun. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
V
IN_SW
=V
IN_A
=V
EN
=5V, V
OUT
=1.2V, V
FB
=0.8V, L=3.3 H, C
IN
=4.7 F, C
OUT
=22 F, T
A
=25°C, unless
otherwise specified.
Parameter Symbol Conditions Min Typ Max Unit
Input Voltage Range V
IN
2.7 5.5 V
Shutdown Current I
OFF
V
EN
=0V 1 A
Active Current I
ON
V
FB
=0.95V 310 A
Regulated Feedback
Voltage
V
FB
For Adjustable Output Voltage 0.784 0.8 0.816 V
Regulated Output
Voltage Accuracy
V
OUT
/V
OUT
V
IN
=2.7V to 5.5V, I
OUT
=10mA
to 2.5A
-3 3 %
Peak Inductor
Current
I
PK
3.0 3.5 A
Oscillator Frequency f
OSC
1.2 1.5 1.8 MHz
PMOSFET R
ON
R
ON(P)
I
SW
=0.75A 100 m 
NMOSFET R
ON
R
ON(N)
I
SW
=0.75A 100 m 
EN High-level Input
Voltage
V
EN_H
1.5 V
EN Low-level Input
Voltage
V
EN_L
0.4 V
EN Input Current I
EN
1 A
Soft-start time t
SS
400 S
Maximum Duty
Cycle
D
MAX
100 %
Under Voltage Lock
Out
V
UVLO
Rising 2.4
V
Falling 2.3
Hysteresis Hysteresis 0.1 V
OVP Threshold V
OVP
5.8 5.9 6.0 V
Hysteresis on OVP 300 400 500 mV
Thermal Shutdown T
SD
Hysteresis=30°C 150 °C