Owner manual

Preliminary Datasheet
2A, 4MHz High Efficiency Synchronous Buck Converter AP3408
Jan. 2013 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
Recommended Operating Conditions
Parameter Symbol Min Max Unit
Input Voltage V
IN
2.6 5.5 V
Maximum Output Current I
OUT (MAX)
2 A
Operating Junction Temperature T
J
-40 125 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 SECTION
Input Voltage Range V
DD
2.6 5.5 V
Supply Current I
Q
V
FB
=0.75V,
No Switching
460
µA
Shutdown Supply Current I
SHDN
Shutdown,
V
IN
=5.5V
1
µA
Under Voltage Threshold
Lockout
V
UVLO
V
DD
Rising 2.2 V
Under Voltage Hysteresis
Lockout
V
HUVLO
300 mV
FEEDBACK SECTION
Feedback Voltage V
FB
0.784 0.8 0.816 V
FB Pin Bias Current I
FB
0.1 0.4
µA
Current Sense Transresistance R
T
0.2
Ω
Switching Leakage Current
V
SHDN/RT
=V
IN
=5.5V
1
µA
Error Gain Amplifier Voltage G
V
800
Error1Amplifier1Trans-conductance G
S
800
µ
A
/V