Technical Reference Notes

ALD12/18/20/25 Series

(Single Output 16

MODEL: ALD12/18/20/25 SERIES

SHEET 2 OF 20

AUGUST 17, 2005 – REVISION C

Electrical Specifications

ABSOLUTE MAXIMUM RATINGS

Stresses in excess of the absolute maximum ratings can cause permanent damage to the converter. Functional operation of

the device is converter is not implied at these or any other conditions in excess of those given in the operational section of

the specs. Exposure to absolute maximum ratings for extended period can adversely affect device reliability.

Parameter

Device

Symbol

Min

Typ

Max

Unit

Input Voltage

1

Continuous

Transient (100ms)

All

-0.3

-

-

-

75

100

Vdc

Isolation Voltage

Input to Output

All

1500

-

-

Vdc

Operating Temperature

All

Ta

-40

-

85

ºC

Storage Temperature

All

-40

-

125

ºC

Operating Humidity

All

-

10

-

85

%

Max Voltage at Enable Pin

All

-0.6

-

25

Vdc

Max Output Power

A (5V0)

-

-

60

W

F (3V3)

-

-

60

W

G (2V5)

-

-

50

W

Y (1V8)

-

-

45

W

M (1V5)

-

-

38

W

K (1V2)

-

-

30

W

INPUT SPECIFICATIONS

Parameter

Device

Symbol

Min

Typ

Max

Unit

Operating Input Voltage Range

All

36

48

75

Vdc

Input Under-Voltage Lock-out

T_ON Threshold

T_OFF Threshold

All

34.0

31.0

34.8

32.5

36.0

33.5

Vdc

Input Current

1

5V0 (A)

3V3 (F)

2V5 (G)

1V8 (Y)

1V5 (M)

1V2 (K)

-

-

-

-

-

-

-

-

2.4

2.4

1.9

1.6

1.4

1.1

A

5V0 (A)

3V3 (F)

2V5 (G)

1V8 (Y)

1V5 (M)

1V2 (K)

-

-

-

-

-

-

-

-

4.1

3.9

3.4

3.4

3.4

2.6

W

Input Ripple Current

2

5Hz to 20MHz

All

-

-

10

mAp-p

Input Voltage Rise Time

10% to 90% of Vout

All

-

1

-

V/ms

Inrush Current

All

I

-

-

1

A