Preliminary datasheet, Dual 1a, 1.5mh, Synchronous step-down dc-dc converter ap3427m – Diodes AP3427M User Manual
Page 5: Electrical characteristics, Parameter symbol conditions min typ max units
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