Diodes AP3409/A - Manual (Page 5)

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