AL8808

Document number: DS35648 Rev. 2 - 2

3 of 20

www.diodes.com

January 2013

© Diodes Incorporated

AL8808

Symbol

Parameter

Min

Max

Unit

Operating Input Voltage Relative to GND

6.0

30

V

Voltage High for PWM Dimming Relative to GND

2.6

5.5

V

Voltage Range for 20% to 100% DC Dimming Relative to GND

0.5

2.5

V

Voltage Low for PWM Dimming Relative to GND

0

0.4

V

Continuous Switch Current (Note 4)

1

A

Maximum Switching Frequency

1

MHz

Junction Temperature Range

-40

+125

°C

Note:

4. Subject to ambient temperature, input voltage and switching frequency. See applications section for suggested derating.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Internal Regulator Start Up Voltage

5.6

V

Internal Regulator Hysteresis Threshold

200

mV

Quiescent Current

350

µA

Input Supply Current

450

µA

Set Current Threshold Voltage

95

100

105

mV

Set Threshold Hysteresis

±20

mV

SET Pin Input Current

16

µA

Open Circuit CTRL Pin Voltage

5

V

CTRL Pin Input Resistance

Referred to internal 5V regulator.

50

kΩ

Internal Reference Voltage

2.5

V

On Resistance of SW MOSFET

0.35

Ω

Switch Leakage Current

0.5

µA

SW Rise Time

7

ns

SW Fall Time

5

ns

Over-Temperature Shutdown

145

°C

10

°C

Thermal Resistance Junction-to-Ambient

TSOT25 (Note 5)

209

°C/W

Thermal Resistance Junction-to-Lead

TSOT25 (Note 5)

57

Thermal Resistance Junction-to-Top

TSOT25 (Note 5)

13

Notes:

5. Device mounted on FR-4 PCB (25mm x 25mm 1oz copper, minimum recommended pad layout on top layer and thermal vias to maximum area

bottom layer ground plane. For better thermal performance, larger copper pad for heat-sink is needed.

…Refer to Figure 42 for the device derating curve.