AP2004

PWM BUCK CONTROLLER

AP2004 Rev. 3

6 of 8

FEBRUARY 2009

www.diodes.com

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)

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)

AVERAGE SUPPLY CURRENT

vs.

AMBIENT TEMPERATURE

2

3

4

5

6

7

-50

-25

0

25

50

75

100

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

0

100

200

300

Frequency (KHz)

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)

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)