Diodes AP3407/A - Manual (Page 5)

Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Dec. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
5
Recommended Operating Conditions
Parameter Symbol Min Max Unit
Input Voltage V
IN
2.5 5.5 V
Maximum Output Current I
OUT (MAX)
1.2 A
Operating Ambient Temperature T
A
-40 85 ºC
Electrical Characteristics
V
IN
=V
DD
=V
PVDD
=3.3V, T
A
=25℃, unless otherwise specified.
Parameters Symbol Conditions Min Typ Max Unit
Input Voltage V
IN
2.5 5.5 V
Quiescent Current I
Q
V
FB
=0.65V 62 100
µA
Shutdown Supply Current I
STBY
V
EN
=GND 0.1 1
µA
Reference Voltage V
REF
For Adjustable Output
Voltage
0.588 0.6 0.612 V
Feedback Bias Current I
FB
V
FB
=V
IN
-0.1 0.1
µA
Output Voltage Accuracy
∆V
OUT
-2 2 %
PMOSFET R
ON
R
DS(ON)_ P
I
SW
= 200mA 0.28 Ω
NMOSFET R
ON
R
DS(ON) _N
I
SW
= -200mA 0.25 Ω
Switch Current Limit I
LIM
V
FB
=0.55V 1.5 2.0 A
V
H
1.5
EN Pin Threshold
V
L
0.4
V
UVLO Threshold V
UVLO
V
DD
Rising 2.3
UVLO Hysteresis V
HYS
0.2
V
Oscillator Frequency f
OSC
1.12 1.40 1.68 MHz
Max. Duty Cycle D
MAX
V
FB
=0V 100
Min. Duty Cycle D
MIN
V
FB
=6.5V 0
%
N-MOS SW Leakage
Current
V
IN
=3.3V, V
SW
=3.3V 0.1
µA
Soft-start Time t 1 ms
Thermal Shutdown T
OTSD
160 ºC
Thermal Shutdown
Hysteresis
T
HYS
20 ºC