Owner's manual

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 101214161820
Vcc-Power Supply Voltage (V)
Vref-
Reference
Output
Voltage (V)
A
VERAGE SUPPLY CURRENT
vs.
POWER-SUPPLY VOLTAGE
0
1
2
3
4
5
048121620
Vcc - Power-Supply Voltgae (V)
Icc-Average
Supply Current
(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
- Average
Supply Current
(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)
fosc - Frequency
(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)
tscp-SCP Time-out
Period (ms)