TC652DEMO【PDF 3/14 页】DEMO BOARD FOR TC652/653 1"X1.2"

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TC652/TC653

1.0

ELECTRICAL

CHARACTERISTICS

*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

Absolute Maximum Ratings*

Input Voltage (V DD to GND) ................................... +6V

Output Voltage (OUT to GND) ................................. 6V

Voltage On Any Pin ....... (GND – 0.3V) to (V DD + 0.3V)

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

periods may affect device reliability.

Package Thermal Resistance ( θ JA )

........... 250°C/W

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

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

TC652/TC653 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: V DD = 2.8V to 5.5V, SHDN = V DD , T A = -40 ° C to 125 ° C unless otherwise specified.

Symbol

V DD

I DD

Parameter

Supply Voltage

Supply Current

Min

2.8

—

Typ.

—

50

Max

5.5

90

Units

V

μ A

Test Conditions

PWM, FAULT, T OVER are

open

SHDN Input

V IH

V IL

SHDN Input High Threshold

SHDN Input Low Threshold

65

—

—

—

—

15

%V DD

%V DD

PWM Output

V OL

V OH

t R

PWM Output Low Voltage

PWM Output High Voltage

PWM Rise Time

—

V DD – 0.5

—

—

—

10

0.3

—

—

V

V

μ sec

I SINK = 1mA

I SOURCE = 5mA

I OH = 5mA, 1nF from

PWM to GND

t F

PWM Fall Time

—

10

—

μ sec

I OL = 1mA, 1nF from

PWM to GND

f OUT

PWM Frequency

10

15

—

Hz

t STARTUP

Start-up Time

—

32/f OUT

—

sec

V DD Rises from GND,

or SHDN Released

V TH (SENSE)

Sense Input

—

70

—

mV

Sense Input Threshold

Voltage with Repect to

Ground

Temperature Accuracy

T H ACC

(T H – T L ) ACC

T HYST

High Temperature Accuracy

Temp. Range Accuracy

Auto-shutdown Hysteresis

T H - 3

-1.0

-2.5

—

T H

—

—

(T H – T L )/5

T H + 3

+1.0

+2.5

—

° C

° C

° C

° C

Note 1

(T H – T L ) ≤ 20 ° C

(T H – T L ) ≥ 20 ° C

TC653 Only

FAULT Output

V HIGH

V LOW

tmp

FAULT Output High Voltage

FAULT Output Low Voltage

Missing Pulse Detector

V DD – 0.5

—

—

—

—

—

—

0.4

32/f OUT

V

V

Sec

I SOURCE = 1.2mA

I SINK = 2.5mA

Time-out

T OVER Output

V HIGH

V LOW

T OVER Output High Voltage

T OVER Output Low Voltage

V DD – 0.5

—

—

—

—

0.4

V

V

I SOURCE = 1.2mA

I SINK = 2.5mA

T OVER

ACC

Absolute Accuracy

—

T H + 10

—

°C

At Trip Point

T OVER HYST

Trip Point Hysteresis

—

5

—

°C

Note

1:

Transition from 90% to 100% Duty Cycle.

2002 Microchip Technology Inc.

DS21453B-page 3

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