Ap2004, Typical characteristics, Pwm buck controller – Diodes AP2004 User Manual
Page 6
AP2004
PWM BUCK CONTROLLER
AP2004 Rev. 3
6 of 8
FEBRUARY 2009
©
Diodes Incorporated
Typical Characteristics
REFERENCE OUTPUT VOLTAGE
vs.
POWER-SUPPLY VOLTAGE
1.22
1.225
1.23
1.235
1.24
1.245
1.25
1.255
1.26
4
8
12
16
20
24
28
Vcc-Power Supply Voltage (V)
Vref-
Referen
ce
Ou
tp
u
t Vo
lt
ag
e
(V)
AVERAGE SUPPLY CURRENT
vs.
POWER-SUPPLY VOLTAGE
0
1
2
3
4
5
0
4
8
12
16
20
24
28
Vcc - Power-Supply Voltgae (V)
Icc-Averag
e
Supply
Curre
nt
(mA)
AVERAGE SUPPLY CURRENT
vs.
AMBIENT TEMPERATURE
2
3
4
5
6
7
-50
-25
0
25
50
75
100
T
A
- Ambient Temperatrure(℃)
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)
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)
ts
c
p
-SCP Tim
e
-out
Pe
riod (m
s
)