SG1825C/SG2825C/SG3825C

PRODUCT DA T ABOOK 1996/1997

Copyright © 1994

Rev. 1.3 6/96

2

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Input Voltage (V

Analog Inputs:

Error Amplifier and Ramp ........................................................................ -0.3V to 7.0V

Softstart and I

Digital Input (Clock) .................................................................................... 1.5V to 6.0V

Driver Outputs ........................................................................................ -0.3V to V

Source / Sink Output Current (each output):

Continuous .............................................................................................................. 0.5A

Pulse, 500ns ............................................................................................................ 2.0A

Softstart Sink Current................................................................................................ 20mA

Clock Output Current ................................................................................................. 5mA

Error Amplifier Output Current ................................................................................. 5mA

Oscillator Charging Current ....................................................................................... 5mA

Operating Junction Temperature:

Hermetic (J, L Package) ....................................................................................... 150°C

Plastic (DW, N, Q Packages) ............................................................................... 150°C

Storage Temperature Range...................................................................... -65°C to 150°C

Lead Temperature (soldering, 10 seconds) ............................................................ 300°C

PACKAGE PIN OUTS

1

16

215

314

413

512

611

710

89

J & N PACKAGE

(Top View)

4

5

6

7

8

321

911 12 13

10

14

15

16

17

18

20 19

DW PACKAGE

(Top View)

Note 1. Exceeding these ratings could cause damage to the device.

N PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθθθθ

JA

65°C/W

DW PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθθθθ

JA

95°C/W

Q PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθθθθ

JA

80°C/W

J PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθθθθ

JA

80°C/W

L PACKAGE:

THERMAL RESISTANCE-JUNCTION TO CASE, θθθθθ

JC

35°C/W

THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθθθθ

JA

120°C/W

Junction Temperature Calculation: T

The θ

system. All of the above assume no ambient airflow.

THERMAL DATA

INV. INPUT

N.I. INPUT

E/A OUTPUT

CLOCK

R

T

C

T

RAMP

SOFTSTART

V

REF

+V

IN

OUTPUT B

V

C

PWR GND

OUTPUT A

GROUND

I

1

16

215

314

413

512

611

710

89

+V

REF

+V

IN

OUTPUT B

V

C

PWR GND

OUTPUT A

GROUND

I

INV. INPUT

N.I. INPUT

E/A OUTPUT

CLOCK

R

T

C

T

RAMP

SOFTSTART

11. N.C.

12. I

13. GROUND

14. OUTPUT A

15. PWR GND

16. N.C.

17. V

C

18. OUTPUT B

19. +V

IN

20. V

REF

1. N.C.

2. INV. INPUT

3. N.I. INPUT

4. E/A OUTPUT

5. CLOCK

6. N.C.

7. R

T

8. C

T

9. RAMP

10. SOFTSTART

L PACKAGE

(Top View)

Q PACKAGE

(Top View)

32

1 20 19

418

17

5

616

15

7

814

9

111213

10