8.4 Thermal Information

THERMAL METRIC(1)

UCD7100

UNIT

HTSSOP

14 PINS

RθJA

Junction-to-ambient thermal resistance

44.3

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

35.3

RθJB

Junction-to-board thermal resistance

29.6

ψJT

Junction-to-top characterization parameter

1.5

ψJB

Junction-to-board characterization parameter

29.3

RθJC(bot)

Junction-to-case (bottom) thermal resistance

4.7

(1)

For more information about traditional and new thermal metrics, see the application report, IC Package Thermal Metrics Application

Report.

8.5 Electrical Characteristics

VDD = 12 V, 4.7-µF capacitor from VDD to GND, TA = TJ = –40°C to 105°C, (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

SUPPLY SECTION

Supply current, OFF

VDD = 4.2 V

200

400

µA

Supply current

Outputs not switching IN = LOW

1.5

2.5

mA

LOW VOLTAGE UNDER-VOLTAGE LOCKOUT

VDD UVLO ON

4.25

4.5

4.75

V

VDD UVLO OFF

4.05

4.25

4.45

VDD UVLO hysteresis

150

250

350

mV

REFERENCE / EXTERNAL BIAS SUPPLY

3V3 initial set point

TA = 25°C

3.267

3.3

3.333

V

3V3 over temperature

3.234

3.3

3.366

3V3 load regulation

ILOAD = 1 mA to 10 mA, VDD = 5 V

1

6.6

mV

3V3 line regulation

VDD = 4.75 V to 12 V, ILOAD = 10 mA

1

6.6

Short circuit current

VDD = 4.75 to 12 V

11

20

35

mA

3V3 OK threshold, ON

3.3 V rising

2.9

3.0

3.1

V

3V3 OK threshold, OFF

3.3 V falling

2.7

2.8

2.9

INPUT SIGNAL

HIGH, positive-going input threshold

voltage (VIT+)

1.65

2.08

V

LOW negative-going input threshold

voltage (VIT-)

1.16

1.5

Input voltage hysteresis, (VIT+ – VIT-)

0.6

0.8

Frequency

2

MHz

CURRENT LIMIT (ILIM)

ILIM internal current limit threshold

ILIM = OPEN

0.466

0.50

0.536

V

ILIM maximum current limit threshold

ILIM = 3.3 V

0.975

1.025

1.075

V

ILIM current limit threshold

ILIM = 0.75 V

0.700

0.725

0.750

ILIM minimum current limit threshold

ILIM = 0.25 V

0.21

0.23

0.25

mV

CLF output high level

CS > ILIM , ILOAD = -7 mA

2.64

V

CLF output low level

CS ≤ ILIM, ILOAD = 7 mA

0.66

Propagation delay from IN to CLF

IN rising to CLF falling after a current limit event

10

20

ns

CURRENT SENSE COMPARATOR

UCD7100

SLUS651E – MARCH 2005 – REVISED NOVEMBER 2021

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