User Manual

AP3409/A
Document number: DS36789 Rev. 2 - 2
5 of 11
www.diodes.com
January 2014
© Diodes Incorporated
AP3409/A
A Product Line of
Diodes Incorporated
Recommended Operating Conditions
Symbol
Parameter
Min
Max
Unit
V
IN
Input Voltage
2.6
5.5
V
I
OUT (MAX)
Maximum Output Current
3
–
A
T
J
Operating Junction Temperature
-40
+125
ºC
Electrical Characteristics (V
IN
=V
DD
=V
PVDD
=3.3V, T
A
=+25
o
C, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
INPUT SECTION
V
DD
Input Voltage Range
2.6
–
5.5
V
I
Q
Supply Current
V
FB
=0.75V,
No Switching
–
460
–
µA
I
SHDN
Shutdown Supply Current
Shutdown, V
IN
=5.5V
–
–
1
µA
V
UVLO
Under Voltage Threshold Lockout
V
DD
Rising
–
2.2
–
V
V
HUVLO
Under Voltage Hysteresis Lockout
–
–
300
–
mV
FEEDBACK SECTION
V
FB
Feedback Voltage
–
0.784
0.8
0.816
V
I
FB
FB Pin Bias Current
–
–
0.1
0.4
µA
R
T
Current Sense Trans-resistance
–
–
0.2
–
–
Switching Leakage Current
V
SHDN/RT
=V
IN
=5.5V
–
–
1
µA
G
V
Error Gain Amplifier Voltage
–
–
800
–
–
G
S
Error Amplifier Trans-conductance
–
–
800
–
µA/V
OSCILLATOR SECTION
V
RT
RT Pin Voltage
–
0.76
0.8
0.84
V
f
OSC
Switching Frequency
R
OSC
0.8
1
1.2
MHz
ADJ Frequency
0.3
–
4
MHz
D
MAX
Maximum Duty Cycle
V
FB
=0.75V
100
–
–
%
POWER SWITCH SECTION
I
LIMIT
Switch Current Limit
AP3409
V
FB
=0.75V
3.2
4.2
–
A
AP3409A
3.5
4.2
–
A
R
PDSON
Internal P-FET On Resistance
I
SW
=500mA
–
0.11
0.16
Ω
R
NDSON
Internal N-FET On Resistance
I
SW
=-500mA
–
0.11
0.17
Ω
SHDN/RT SECTION
–
Shutdown Threshold
–
–
V
DD
-0.7
V
DD
-0.4
V
PGOOD SECTION (Only for AP3409A)
–
PGOOD Voltage Range
–
–
±12.5
±15
%
–
PGOOD Pull Down Resistance
–
–
–
120
Ω
TOTAL DEVICE
I
OUT
Output Current
V
DD
=2.6V to 5.5V,
V
OUT
=2.5V
3
–
–
A
LNR
Output Voltage Line Regulation
V
DD
=2.7V to 5.5V,
I
OUT
=100mA
–
0.4
–
%/V
LOD
Output Voltage Load Regulation
I
OUT
=0.01A to 3A
–
±0.2
–
%
t
SS
Soft-start Time
I
OUT
＝10mA
–
1.5
–
ms
T
OTSD
Thermal Shutdown Temperature
–
–
+160
–
ºC
T
HYS
Thermal Shutdown Temperature
Hysteresis
–
–
+20
–
ºC