Graphics Card Power Supply

Shutdown Control

VDD

SMBus Master

and

Control Circuitry

Thermal Diode-Connected Transistor

LM99

D+

D-

2.2 nF

SMBData

SMBCLK

ALERT

T_CRIT_A

2

3

5

4

6

8

7

+3.3 VDC

10 uF

0.1 uF

100 pF

+3.3 VDC

5.1 k

Pull-ups

+3.3 VDC

1.5 k

Pull-ups

GND

1

VDD

Graphics Processor

LM99

www.ti.com

SNIS129D – JANUARY 2003 – REVISED MARCH 2013

Typical Application

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Copyright © 2003–2013, Texas Instruments Incorporated

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Product Folder Links: LM99