AP5002
PWM CONTROL 2A STEP-DOWN CONVERTER
AP5002 Rev. 8 4 of 10 FEBRUARY 2009
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Electrical Characteristics (VIN = 12V, T
A
= 25°C, unless otherwise specified)
Symbol Parameter Conditions Min Typ. Max Unit
V
FB
Feedback Voltage I
OUT
= 0.1A 0.784 0.8 0.816 V
I
FB
Feedback Bias Current I
OUT
= 0.1A - 0.1 0.5 µA
I
CCQ
Quiescent Current V
FB
= 1.2 force drive off - 3 5 mA
I
SW
Switch Current -- 3.5 - - A
I
SD
Shutdown Supply Current V
EN
= 0V - 10 - µA
∆V
OUT
/V
OUT
Line Regulation V
IN
= 4V~20V, I
OUT
= 0.2A - 1 2 %
∆V
OUT
/V
OUT
Load Regulation I
OUT
= 0.1 to 2A - 0.5 1 %
f
OSC
Oscillation Frequency Measure waveform at SW pin 400 500 600 KHz
V
SH
EN Pin Input Voltage
Evaluate oscillation at SW pin 2.0 - -
V
V
SL
Evaluate oscillation stop at SW pin - - 0.8
I
SH
EN Pin Input Leakage
Current
Ven = 2V -10 - 10 µA
I
SL
Ven = 0.8V -10 - 10 µA
T
SS
Soft-Start Time -- - 3 - ms
R
DSON
Internal MOSFET Rdson
V
IN
= 5V, V
FB
= 0V - 110 150
mΩ
V
IN
= 12V, V
FB
= 0V - 70 100
Thermal shutdown 140
o
C
Minimum Duty Cycle
6.5 %
θ
JA
Thermal Resistance
Junction-to-Ambient
SOP-8L (Note 3) 124
o
C/W
θ
JC
hermal Resistance
Junction-to-Case
SOP-8L (Note 3) 25
o
C/W
Notes: 3. Test condition: Device mounted on 2oz copper, minimum recommended pad layout, FR-4 PCB.
