4-102

TELCOM SEMICONDUCTOR, INC.

ABSOLUTE MAXIMUM RATINGS

Output Current, Source or Sink (Pins 1, 14) .......... 500mA

Reference Output Current (Pin 2) ........................ – 30 mA

Sync Output Current (Pin 10) .................................. – 5mA

Error Amplifier Output Current (Pin 7) ..................... – 5mA

Soft Start Sink Current (Pin 1) .................................. 50mA

Oscillator Charging Current (Pin 9) ............................ 5mA

Supply Voltage ............................................................ 18V

Maximum Chip Temperature ................................... 150

°C

Storage Temperature ............................ – 65

°C to +150°C

Lead Temperature (Soldering, 10 sec) ................... 300

°C

Package Thermal Resistance

NOTES:

1. All voltages are with respect to Ground, Pin 12. Currents are positive into,

negative out of the specified terminal.

2. Static-sensitive device. Unused devices must be stored in conductive

material. Protect devices from static discharge and static fields. Stresses

above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. These are stress ratings only and functional

operation of the device at these or any other conditions above those

indicated in the operational sections of the specifications is not implied.

Exposure to Absolute Maximum Rating Conditions for extended periods

may affect device reliability.

PIN CONFIGURATIONS

8

1

14

2

13

3

12

4

11

5

10

6

9

7

VDD

+ CURRENT SENSE

15

16

OUTPUT B

– CURRENT SENSE

VIN

VREF

SHDN

CURRENT LIMIT/

SOFT START

GND

+ ERROR AMP

OUTPUT A

– ERROR AMP

SYNC

COMP

RT

CT

TC18C46MJE

TC28C46EPE

TC38C46CPE

8

1

14

2

13

3

12

4

11

5

10

6

9

7

15

16

TC28C46EOE

TC38C46COE

VDD

+ CURRENT SENSE

OUTPUT B

– CURRENT SENSE

VIN

VREF

SHDN

CURRENT LIMIT/

SOFT START

GND

+ ERROR AMP

OUTPUT A

– ERROR AMP

SYNC

COMP

RT

CT

16-Pin Plastic DIP (Narrow)

16-Pin CerDIP

16-Pin SOIC (Wide)

CMOS CURRENT MODE

PWM CONTROLLERS

TC18C46

TC28C46

TC38C46