Diodes AP3431 - Manual (Page 5)

Data Sheet
1.0MHz, 2.0A, Synchronous Step Down DC-DC Converter AP3431
Nov. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
V
IN
=V
CC
=V
EN
=5V, V
OUT
=1.2V, V
FB
=0.8V, L=2.2 µH, C
IN
=10 µF, C
OUT
=22 µF, 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 4 µA
Active Current I
ON
V
FB
= 0.95V 460 µA
Regulated 1 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
=0 to 2.0A
-3 3 %
Peak Inductor
Current
I
PK
2.9 A
Oscillator Frequency f
OSC
V
IN
= 2.7V to 5.5V 1.0 MHz
PMOSFET R
ON
R
ON(P)
V
IN
= 5V 120 m Ω
NMOSFET R
ON
R
ON(N)
V
IN
= 5V 120 m Ω
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
2 µA
Soft-start Time t
SS
450 µs
Maximum Duty
Cycle
D
MAX
90 %
Rising 2.4 V
Falling 2.3 V
Under Voltage Lock
Out Threshold
Hysteresis 0.1 V
Thermal Shutdown T
SD
Hysteresis=30°C 160 °C