 2002 Microchip Technology Inc.

DS21444C-page 3

TC642

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Supply Voltage ......................................................... 6V

Package Thermal Resistance:

Specified Temperature Range ........... -40°C to +125°C

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

*Stresses above those listed under "Absolute Maximum Rat-

ings" may cause permanent 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

operation sections of the specifications is not implied. Expo-

sure to absolute maximum rating conditions for extended peri-

ods may affect device reliability.

ELECTRICAL SPECIFICATIONS

Note 1: Ensured by Design, not tested.

Symbol

Parameter

Min

Typ

Max

Units

Test Conditions

Supply Voltage

3.0

—

5.5

V

Supply Current, Operating

—

0.5

1.0

mA

Pins 6, 7 Open,

Supply Current, Shutdown Mode

—

25

—

µA

Pins 6, 7 Open,

Note 1

- 1.0

—

+1.0

µA

Note 1

—

—

50

µsec

—

—

50

µsec

Clear Fault Mode

30

—

—

µsec

Note 1

1.0

—

—

mA

5.0

—

—

mA

for 100% PWM Duty Cycle

2.5

2.65

2.8

V

1.3

1.4

1.5

V

ensure Shutdown Mode

——

V

Release Shutdown Mode

—

—

V

Pulse Width Modulator

PWM Frequency

26

30

34

Hz

SENSE Input

SENSE Input Threshold

Voltage with Respect to GND

50

70

90

mV

Note 1

FAULT Output

Output Low Voltage

—

—

0.3

V

Missing Pulse Detector Timer

—

32/F

—

Sec

Start-up Timer

—

32/F

—

Sec

Diagnostic Timer

—

3/F

—

Sec