AP2008(2009) 查看數據表（PDF） - Diodes Incorporated.

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AP2008
(Rev.:2009)

PWM BUCK CONTROLLER

Diodes Incorporated. 

AP2008

PWM BUCK CONTROLLER

Electrical Characteristics (Continued) (TA=25ºC, VCC=6V, f=200 Khz)

Output section

Symbol

Parameter

Conditions

ILEAK

Leakage current

VO = 20V

Sink current

IDRV

Source current

VIN= 12V

VIN= 12V

VSAT Output saturation voltage

IO = 10 mA

ISC

Short-circuit output current

PWM comparator

Symbol

Parameter

VO = 6V

Conditions

VT0

Input threshold voltage at f = 10 KHz

VT100

(COMP)

Total device

Symbol

Parameter

CT=6800pF

Maximum duty cycle

Conditions

ICCA

Soft Start

Symbol

Average supply current

Parameter

CT = 270pF

Conditions

VSS

Soft-start Voltage

ISS

Constant Charge Current

Min Typ. Max Unit

10 µA

200

mA

200

mA

1.0 1.5

V

120

mA

Min Typ. Max Unit

0.6 0.7 V

1.2 1.3

V

Min Typ. Max Unit

6

10 mA

Min Typ. Max Unit

2.3

V

20

µA

Typical Application Circuit

R3 30K

C2

10nF

(Optional)

C4 270pF

C5 50nF

C6 220nF

Q1

P mos

L1

10uH

5A

R1

1K

R2

4K

Vcc = 12V

C1

470uF

Output

1V/5A

C4

50nF

(Optional)

C3

470uF

Step-Down DC/DC converter

AP2008 Rev. 2

5 of 8

www.diodes.com

FEBRUARY 2009

© Diodes Incorporated

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