AP1539 데이터 시트보기 (PDF) - Diodes Incorporated.

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AP1539

18V 4A 300KHz BUCK CONVERTER

Diodes Incorporated. 

AP1539

18V 4A 300KHz BUCK CONVERTER

Electrical Characteristics

(VIN = 12V, TA = 25°C, unless otherwise specified)

Symbol

Parameter

Conditions

VFB

IFB

ISHDN

Feedback Voltage

Feedback Bias Current

Current Consumption During

Power Off

IOUT = 0.1A

IOUT = 0.1A

VEN = 0V

Min

0.784

-

-

Typ.

0.8

0.1

10

Max Unit

0.816 V

0.5 µA

-

µA

∆VOUT

/ VIN

Line Regulation

VIN = 5V~18V

-

1

2

%

∆VOUT

/ VOUT

fOSC

fOSC1

Load Regulation

IOUT = 0.1 to 4A

Oscillation Frequency

Measure waveform at SW pin

Frequency of Current Limit or

Short Circuit Protection

Measure waveform at SW pin

-

0.2 0.5 %

240 300 400 KHz

-

50

- KHz

VIH

VIL

EN Pin Input Voltage

Evaluate oscillation at SW pin

2.0

Evaluate oscillation stop at SW pin -

-

-

-

0.8

V

ISH

ISL

EN

Pin

Input

Leakage

Current

EN

EN

Pin

Pin

High

Low

-

20

-

µA

-

-10

-

µA

IOCSET OCSET Pin Bias Current

--

75

90 105 µA

RDS(ON) Internal MOSFET RDS(ON)

VIN = 5V, VFB = 0V

VIN = 12V, VFB = 0V

-

-

90

50

-

-

mΩ

EFFI Efficiency

VIN = 12V, VOUT = 5V

IOUT = 4A

-

92

-

%

TSHDN Thermal shutdown threshold

-

150

-

°C

THYS Thermal shutdown hysteresis

-

55

-

°C

θJC

Thermal Resistance

Junction-to-Case

SOP-8L-DEP (Note 5)

-

26

- oC/W

Notes: 5. Test condition for SOP-8L-DEP: Devices mounted on 2oz copper, minimum recommended pad layout on top & bottom layer with thermal vias,

double sided FR-4 PCB.

AP1539 Rev. 4

DS31477

5 of 13

www.diodes.com

OCTOBER 2009

© Diodes Incorporated

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