AP8802

1A LED Step-down Converter

AP8802 Rev. 5

5 of 16

DECEMBER 2009

DS31766

www.diodes.com

Symbol

Parameter

Conditions

Min

Typ.

Max

Unit

Operating Input Voltage

8.0

-

48

V

Continuous switch current

(Note 4)

1

A

Quiescent Current

-

75

120

μA

Switching Frequency

-

-

0.5

MHz

Internal Threshold Voltage

184

200

216

mV

Internal Reference Voltage

-

1.25

-

V

SET

SET pin input current

-

5

-

μA

Rds(on)

On Resistance of MOSFET

0.65

1.1

Ω

-

-

8

μA

EN

Voltage High

ON

1.25

-

-

V

EN

Voltage Low

OFF

-

-

0.2

V

θ

JA

Thermal Resistance

Junction-to-Ambient

SOP-8L (Note 5)

-

82

-

°C/W

SOP-8L-EP (Note 5)

-

45

-

°C/W

DFN3030-10 (Note 5)

-

38

-

°C/W

θ

JC

Thermal Resistance

Junction-to-Case

SOP-8L (Note 5)

-

52

-

°C/W

SOP-8L-EP (Note 5)

-

7

-

°C/W

DFN3030-10 (Note 5)

-

24

-

°C/W

Notes:

4. Refer to figure 8 for the device derating curve.

5. Test condition for SOP-8L, SOP-8L-EP and DFN3030-10: Device mounted on FR-4 PCB, 2”x2”, 2oz copper, minimum recommended pad layout

on top layer and thermal vias to bottom layer ground plane. For better thermal performance, larger copper pad for heat-sink is needed.

Electrical Characteristics