Ap1530, Electrical characteristics – Diodes AP1530 User Manual

Page 5

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AP1530

18V 3A 300KHz BUCK CONVERTER

AP1530 Rev. 7

5 of 12

NOVEMBER 2009

DS31092

www.diodes.com

©

Diodes Incorporated

Electrical Characteristics



(V

IN

= 12V, T

A

=25°C, unless otherwise specified)

Symbol

Parameter

Conditions

Min

Typ.

Max

Unit

V

FB

Feedback

Voltage

I

OUT

=0.1A 0.784

0.8

0.816

V

I

FB

Feedback

Bias

Current

I

OUT

=0.1A -

0.1

0.5

µA

I

SW

Switch

Current

--

3.5

-

-

A

I

SHDN

Current Consumption During
Power Off

V

EN

=0V

-

10

-

µA

∆V

OUT

/V

IN

Line Regulation

V

IN

=5V~18V -

1

2

%

∆V

OUT

/V

OUT

Load Regulation

I

OUT

=0.1 to 3A

-

0.2

0.5

%

f

OSC

Oscillation

Frequency

Measure

waveform at SW pin

240

300

360

kHz

f

OSC1

Frequency of Current Limit or
Short Circuit Protection

Measure waveform at SW pin

-

50

-

kHz

V

IH

EN Pin Input Voltage

Evaluate oscillation at SW pin

2.0

-

-

V

V

IL

Evaluate oscillation stop at SW pin

-

-

0.8

I

ENH

EN Pin Input Leakage Current

-- -

20

-

µA

I

ENL

--

-

-10

-

µA

I

OCSET

OCSET Pin Bias Current

--

75

90

105

µA

T

SS

Soft-Start

Time

--

0.3

2

5 ms

T

SHDN

Thermal shutdown threshold

-

150

-

°C

T

HYS

Thermal shutdown hysteresis

-

55

-

°C

R

DSON

Internal MOSFET R

DS(ON)

V

IN

=5V, V

FB

=0V -

110

150

m

V

IN

=12V, V

FB

=0V

-

70 100

EFFI Efficiency

V

IN

=12V, V

OUT

= 5V

I

OUT

=3A

- 92 -

%

θ

JA

Thermal Resistance
Junction-to-Ambient

SOP-8L (Note 3)

-

134

-

o

C/W

θ

JC

Thermal Resistance
Junction-to-Case

SOP-8L (Note 3)

-

22

-

o

C/W

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.

















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