Diodes AP2008 - Manual (Page 6)

AP2008
PWM BUCK CONTROLLER
AP2008 Rev. 2 6 of 8 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Typical Characteristics
REFERENCE OUTPUT VOLTAGE
vs.
POWER-SUPPLY VOLTAGE
0.755
0.76
0.765
0.77
0.775
0.78
0.785
4 6 8 10 12 14 16 18 20
Vcc-Power Supply Voltage (V)
Vref-
Reference
Output
Vo
lt
ag
e (V)
AVERAGE SUPPLY CURRENT
vs.
POWER-SUPPLY VOLTAGE
0
1
2
3
4
5
0 4 8 12 16 20
Vcc - Power-Supply Voltgae (V)
Icc-Aver
age
S
upply Cur
rent
(mA)
AVERAGE SUPPLY CURRENT
vs.
AMBIENT TEMPERATURE
2
3
4
5
6
7
-50 -25 0 25 50 75 100
T
A
- Ambient Temperature (℃)
I CC
- Aver
age
Suppl
y Cur
rent
(mA)
V
CT
vs. FREQUENCY
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 100 200 300
Frequency (KHz)
V
CT
(V)
VCT(min)
VCT(max)
OSCILLATOR FREQUENCY
vs.
TIMING CAPACITANCE
0
50
100
150
200
250
300
350
100 600 1100 1600 2100 2600 3100 3600 4100 4600 5100 5600 6100 6600
CT-Timing Capacitor (pF)
fo
sc - F
req
u
e
n
cy
(KHz)
SCP TIME-OUT PERIOD
vs.
SCP CAPACITANCE
0
5
10
15
20
25
30
35
45 90 135 180 225 270 315 360 405 450 495
Cscp - SCP Capacitance (nF)
ts
c
p
-SCP Time
-out
Pe
riod (ms
)