UCD7230 datasheet(6/33 Pages) TI

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ELECTRICAL CHARACTERISTICS

UCD7230

SLUS741C – NOVEMBER 2006 – REVISED MARCH 2007

DD = PVDD = 12 V, 4.7-µF from VDD to AGND, 1 µF from PVDD to PGND, 0.1 µF from CSBIAS to AGND, 0.22 µF from BST to

SW, T

A = TJ = -40°C to +125°C, RCS+ = 5 kΩ, RDLY = 50 kΩ over operating free-air temperature range (unless otherwise

noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

Supply current, off

VDD = 4.2 V

500

700

µA

Supply current

Outputs not switching IN = LOW

LOW-VOLTAGE UNDER-VOLTAGE LOCKOUT

VDD UVLO ON

VDD rising

4.25

4.50

4.75

VDD UVLO OFF

VDD falling

4.00

4.25

4.50

VDD UVLO hysteresis

100

250

400

REFERENCE / EXTERNAL BIAS SUPPLY

3V3 initial set point

TA = 25°C

3.267

3.3

3.333

3V3 over temperature

3.234

3.3

3.366

3V3 load regulation

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

VDD = 4.75 V to 12 V, ILOAD = 10

3V3 line regulation

Short circuit current

VDD = 4.75 V to 12 V

3V3 OK threshold, ON

3.3 V rising

2.8

3.2

3V3 OK threshold, OFF

3.3 V falling

2.6

2.8

3.0

INPUT SIGNAL (IN)

Positive-going input threshold

INHigh

1.6

1.9

2.2

voltage

Negative-going input threshold

INLow

1.0

1.3

1.6

voltage

INHigh –

Input voltage hysteresis

0.4

0.6

0.8

INLow

Input resistance to AGND

100

150

Ω

Frequency ceiling

MHz

CURRENT LIMIT (ILIM)

ILIM internal voltage setpoint

ILIM=OPEN

0.47

0.50

0.53

ILIM input impedance

Ω

CLF output high level

ILOAD = 4 mA

2.7

CLF output low level

ILOAD = 4 mA

0.6

Propagation delay from IN to reset

2nd IN rising to CLF falling after a

CLF

current limit event

CURRENT SENSE COMPARATOR (OUTPUT SENSE)

ILIM = open

ILIM = 3.3 V

100

120

CS threshold (POS - NEG)

ILIM = 0.75 V

ILIM = 0.25 V

Propagation delay from POS to

ILIM = open, CS = threshold + 60 mV

OUT1 falling(1)

Propagation delay from POS to

ILIM = open, CS = threshold + 60 mV

100

CLF(1)

(1)

As designed and characterized. Not 100% tested in production.

UCD7230 Datasheet(PDF) 6 Page - Texas Instruments

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