15

LTC1643L/LTC1643L-1/LTC1643H

GN Package

16-Lead Plastic SSOP (Narrow 0.150)

(LTC DWG # 05-08-1641)

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.

Figure 9. System Without 3.3V Supply

GN16 (SSOP) 1098

* 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

12

3

4

5

6

7

8

0.229 – 0.244

(5.817 – 6.198)

0.150 – 0.157**

(3.810 – 3.988)

16 15 14 13

0.189 – 0.196*

(4.801 – 4.978)

12 11 10 9

0.016 – 0.050

(0.406 – 1.270)

0.015

± 0.004

(0.38

± 0.10)

× 45°

0

° – 8° TYP

0.007 – 0.0098

(0.178 – 0.249)

0.053 – 0.068

(1.351 – 1.727)

0.008 – 0.012

(0.203 – 0.305)

0.004 – 0.0098

(0.102 – 0.249)

0.0250

(0.635)

BSC

0.009

(0.229)

REF

Q1

IRF7413

R1

0.007

Ω

R6

10

Ω

R7

100

Ω

C1

0.047

µF

5V

5A

GND

–12V

100mA

12V

500mA

R3

10k

R4

10k

11

13

12

14

3

16

15

4

10

9

8

1

2

5

6

7

GND

ON

FAULT

PWRGD

LTC1643H

TIMER

GATE

1643 G09

SYSTEM

POWER

SUPPLY

PCI

POWER

SYSTEM

CONTROLLER

C2

0.1

µF