23

LTC1421/LTC1421-2.5

G Package

24-Lead Plastic SSOP (0.209)

(LTC DWG # 05-08-1640)

Dimensions in inches (millimeters) unless otherwise noted.

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

S24 (WIDE) 0996

NOTE 1

0.598 – 0.614*

(15.190 – 15.600)

22

21

20

19

18

17

16

15

1

23

4

5

6

78

0.394 – 0.419

(10.007 – 10.643)

910

13

14

11

12

23

24

0.037 – 0.045

(0.940 – 1.143)

0.004 – 0.012

(0.102 – 0.305)

0.093 – 0.104

(2.362 – 2.642)

0.050

(1.270)

TYP

0.014 – 0.019

(0.356 – 0.482)

TYP

0

° – 8° TYP

NOTE 1

0.009 – 0.013

(0.229 – 0.330)

0.016 – 0.050

(0.406 – 1.270)

0.291 – 0.299**

(7.391 – 7.595)

× 45°

0.010 – 0.029

(0.254 – 0.737)

NOTE:

1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

*

**

G24 SSOP 0595

0.068 – 0.078

(1.73 – 1.99)

0.002 – 0.008

(0.05 – 0.21)

0.0256

(0.65)

BSC

0.010 – 0.015

(0.25 – 0.38)

0.301 – 0.311

(7.65 – 7.90)

12 3

4

5

6 7 8

9 10 11 12

0.318 – 0.328*

(8.07 – 8.33)

21

22

18 17 16 15 14 13

19

20

23

24

0.005 – 0.009

(0.13 – 0.22)

0

° – 8°

0.022 – 0.037

(0.55 – 0.95)

0.205 – 0.212**

(5.20 – 5.38)

DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

*

**

SW Package

24-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

Figure 26. Power-Up and Power-Down Sequence Controller

10

11

6

7

8

14

13

15

9

1

24

4

5

3

2

12

LTC1421

16

C2

0.1

µF

24V

C1

1

µF

16V

0.047

µF

17

18

19

20

21

22

23

+

C4

2200

µF

16V

+

C5

0.1

µF

24V

+

1k

R1

0.005

Ω

1W

R3

1M

5%,1/8W

Q1

MTB50N06E

Q2

MTB50N06E

S1

1421 F26

PC BOARD

BACKPLANE

5V

3V

R6

200k

5%

1/16W

R5

330k

5%

1/16W

3V

8A

5V

8A

R2

0.005

Ω

1W

C4

2200

µF

16V

+

RESET

GND

µP

R4

1k

5%

1/16W