Technical Reference Notes

ALQ40/50 Series

(Open Frame Single Output Quarter Brick)

MODEL: ALQ50 SERIES

SHEET 4 OF 16

APRIL 21, 2003 - REVISION A (PRELIMINARY)

Electrical Specifications (continued)

INPUT SPECIFICATION

Parameter

Device

Symbol

Min

Typ

Max

Unit

Operating Input Voltage

All

36

48

75

Input Under-Voltage Lock-out

T_ON Threshold

T_OFF Threshold

All

33

32

-

-

35

34

Vdc

Maximum Input Current

1

F (3.3V)

G (2.5V)

Y (1.8V)

K (1.2V)

-

-

-

-

-

-

-

-

4.4

4.3

3.2

2.3

A

3V3 (F)

2V5 (G)

1V8 (Y)

1V2 (K)

-

-

-

-

-

-

-

-

5

5

3.3

2.5

W

Input Reflected Ripple Current

2

BW: 5Hz to 20MHz

All

-

-

10

Note:

1. An input line fuse is recommended for use.

2. External input capacitance required. See Input Ripple Current test measurement setup on Fig 1.

OUTPUT SPECIFICATIONS

Parameter

Device

Symbol

Min

Typ

Max

Unit

Output Voltage Set point

3V3 (F)

2V5 (G)

1V8 (Y)

1V2 (K)

3.260

2.465

1.770

1.180

3.300

2.500

1.800

1.200

3.340

2.535

1.830

1.220

Vdc

Vdc

Vdc

Vdc

Output Regulation

Temperature: Ta = -40 ºC to

+85ºC

All

1V2 (K)

All

1V2 (K)

All

-

-

-

-

-

-

-

-

-

±0.20

±0.30

±0.20

±0.30

±1.00

%Vo

Ripple and Noise

4

Peak-to-Peak: (5Hz to 20MHz)

1V2

1V8/2V5

3V3

-

-

-

-

25

35

45

50

75

100

mVp-p

mVp-p

mVp-p

Output Current

3

3V3

All

0

0

-

-

40

50

A

External Load Capacitance

Capacitor ESR

All

-

-

4

-

-

25,000

-

µF

m

Ω

Output Current-limit Inception

5

3V3

All

41

52

-

-

52

68

A