Diodes AP3427M - Manual (Page 5)

Preliminary Datasheet
Dual 1A, 1.5MH
Z
Synchronous Step-down DC-DC Converter AP3427M
Mar. 2013 Rev. 1.0 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
T
A
=25°C, V
IN
=V
IN1
=V
IN2
=5V, V
EN1
=V
EN2
=5V, V
FB1
=V
FB2
=0.6V, L1=L2=2.2
μH, C
IN1
=C
IN2
=4.7
μF,
C
OUT1
=C
OUT2
=10
μF, I
MAX
=1A per Channel, unless otherwise specified.
Parameter Symbol Conditions Min Typ Max Units
Input Voltage Range V
IN
V
IN
=V
IN1
=V
IN2
2.5 5.5 V
Shutdown Current I
OFF
V
EN1
=V
EN2
=0 0.1 1
μA
Active Current I
ON
V
FB1
=V
FB2
=0.7V,
I
OUT1
=I
OUT2
=0A
220
μA
Regulated Feedback
Voltage
V
FB
For Adjustable Output
Voltage
0.588 0.6 0.612 V
Regulated Output
Voltage Accuracy Δ
V
OUT
/V
OUT
V
IN
=2.5V to 5.5V,
I
OUT1
or I
OUT2
=0 to 1A
-3 3 %
Peak Inductor Current I
PK
1.5 A
Oscillator Frequency f
OSC
V
IN
=2.5V to 5.5V 1.2 1.5 1.8 MHz
PMOSFET R
DS(ON)
R
DS(ON)P
V
IN
=5V 200 m
Ω
NMOSFET R
DS(ON)
R
DS(ON)N
V
IN
=5V 200 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
0.1
μA
Soft Start Time t
SS
400
μs
Maximum Duty Cycle D
MAX
100 %
Input Over Voltage
Protection
V
IOVP
6.2 V
Under Voltage Lock
Out Threshold
V
UVLO
Rising 2.3
V Falling 2.1
Hysteresis 0.2
Thermal Shutdown T
SD
Hysteresis=30°C 155 °C