AP1530

18V 3A 300KHz BUCK CONVERTER

AP1530 Rev. 7

5 of 12

NOVEMBER 2009

DS31092

www.diodes.com

Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ.

Max

Unit

Feedback Voltage

0.784

0.8

0.816

V

Feedback Bias Current

-

0.1

0.5

µA

Switch Current

--

3.5

-

-

A

Current Consumption During

Power Off

-

10

-

µA

∆V

OUT

Line Regulation

-

1

2

%

∆V

OUT

Load Regulation

-

0.2

0.5

%

Oscillation Frequency

Measure waveform at SW pin

240

300

360

kHz

Frequency of Current Limit or

Short Circuit Protection

Measure waveform at SW pin

-

50

-

kHz

EN Pin Input Voltage

Evaluate oscillation at SW pin

2.0

-

-

V

Evaluate oscillation stop at SW pin

-

-

0.8

EN Pin Input Leakage Current

--

-

20

-

µA

--

-

-10

-

µA

OCSET Pin Bias Current

--

75

90

105

µA

Soft-Start Time

--

0.3

2

5

ms

Thermal shutdown threshold

-

150

-

°C

Thermal shutdown hysteresis

-

55

-

°C

-

110

150

m

Ω

-

70

100

EFFI

Efficiency

-

92

-

%

θ

JA

Thermal Resistance

Junction-to-Ambient

SOP-8L (Note 3)

-

134

-

θ

JC

Thermal Resistance

Junction-to-Case

SOP-8L (Note 3)

-

22

-

Notes:

3. Test condition SOP-8L: Device mounted on FR-4 substrate 2oz copper, minimum recommended pad layout, and single side.

For better thermal performance, please arrange larger copper pad of layout for heatsink.