AP8803

Document number: DS31970 Rev. 5 - 2

3 of 10

www.diodes.com

August 2012

© Diodes Incorporated

AP8803

Symbol

Parameter

Min

Max

Unit

Operating Input Voltage

8.0

30

V

Voltage High

0.3

2.5

V

Voltage Low

0.25

V

Continuous Switch Current (Note 5)

1

A

Ambient Temperature Range

-40

+125

°C

Duty Cycle

Using Inductor

≥ 100µH (Note 4)

0.1

0.95

Notes:

4. For most applications the LED current will be within 8% over the duty cycle range specified. Duty cycle accuracy is also dependent on

propagation delay. Smaller size inductors can be used but LED current accuracy may be greater than 8% at extremes of duty cycle. This is

most noticeable at low duty cycles (less than 0.1) or when the input voltage is high and only one LED is being driven.

5. Refer to Figure 8 for the device derating curve.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Internal Regulator Start-Up Threshold

5.65

V

5.55

V

Quiescent Current

CTRL pin floating f = 250kHz

1.8

5

mA

Internal Threshold Voltage

92

100

108

mV

SET Pin Input Current

1.25

10

µA

Internal Reference Voltage

1.25

V

On Resistance of MOSFET

0.5

1

Ω

Continuous Switch Current

(Note 5)

1

A

Switch Leakage Current

8

µA

Switching Frequency

0.7

MHz

θ

JA

Thermal Resistance Junction-to-

Ambient

TSOT25 (Note 6)

125

°C/W

Notes:

5. Refer to Figure 8 for the device derating curve.

6. Test condition for TSOT25: Device mounted on FR-4 PCB, 25mm x 25mm, 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.