Owner's manual

Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter AP3410
Mar. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
5
Recommended Operating Conditions
Parameter Symbol Min Max Unit
Supply Input Voltage V
IN
2.5 5.5 V
Operating Ambient Temperature T
A
-40 85 ºC
Operating Junction Temperature T
J
-40 125 ºC
Electrical Characteristics
V
IN
=V
EN
=5V, V
OUT
=1.2V, V
FB
=0.6V, L=2.2µH, C
IN
=4.7µF, C
OUT
=10µF, T
A
=25°C, unless otherwise
specified.
Parameters Symbol Conditions Min Typ Max Unit
Input Voltage Range V
IN
2.5 5.5 V
Shutdown Current I
OFF
V
EN
=0 0.1
µA
Active Current I
ON
V
FB
=0.55V 220
µA
Regulated Feedback
Voltage
V
FB
0.588 0.6 0.612 V
Regulated Output
Voltage Accuracy
∆V
OUT
/V
OUT
V
IN
=2.5V to 5.5V,
I
OUT
=0 to 1.2A
-3 3 %
Peak Inductor Current I
PK
1.5
1.9
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
mΩ
NMOSFET R
DS(ON)
R
DS(ON)N
V
IN
=5V 200
mΩ
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 %
Under Voltage Lock
Out Threshold
V
UVLO
Rising 2.3
V Falling 2.1
Hysteresis 0.2
Thermal Shutdown T
SD
Hysteresis=30°C 155 160 °C