Ap5002, Electrical characteristics, Pwm control 2a step-down converter – Diodes AP5002 User Manual
Page 4
AP5002
PWM CONTROL 2A STEP-DOWN CONVERTER
AP5002 Rev. 8
4 of 10
FEBRUARY 2009
©
Diodes Incorporated
Electrical Characteristics
(V
IN
= 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
m
Ω
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
Thermal 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.