UCC2915, UCC3915

15V PROGRAMMABLE HOT SWAP POWER MANAGER

SLUS198C – FEBUARY 2000 - REVISED - JUNE 2001

4

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics, these specifications apply for TA = –40°C to 85°C for the UCC2915 and

0

°C to 70°C for the UCC3915, VIN = 12 V, IMAX = 0.4 V, SHTDWN = 2.4 V, TA = TJ, (unless otherwise

stated)

DAC (continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Trip c rrent

Code = 1110

2.30

2.75

3.25

A

Trip current

Code = 1111

2.50

3.0

3.50

A

Max output current over trip

(current source mode)

Code = 0100 to 1111,

IMAX = 0 V

0.35

1.0

1.65

A

Max output current

(current source mode)

Code = 0100 to 1111,

IMAX = 2.4 V

3.0

4.0

5.2

A

NOTE 1: All voltages are with respect to GND. Current is positive into and negative out of the specified terminal.

fault timer

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

CT charge current

VCT = 1.0 V

–83

–62

–47

µA

CT discharge current

VCT = 1.0 V

0.8

1.2

1.8

µA

Output duty cycle

VOUT = 0 V

1.0%

1.9%

3.3%

CT fault threshold

1.2

1.5

1.7

V

CT reset threshold

0.4

0.5

0.6

V

NOTE 1: All voltages are with respect to GND. Current is positive into and negative out of the specified terminal.

shutdown

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Shutdown threshold

1.1

1.5

1.9

V

Shutdown hysteresis

150

mV

Input current

100

500

nA

NOTE 1: All voltages are with respect to GND. Current is positive into and negative out of the specified terminal.

open drain output (FAULT)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

High level output current

FAULT = 5 V

250

µA

Low level output voltage

IOUT = 5 mA

0.2

0.8

V

NOTE 1: All voltages are with respect to GND. Current is positive into and negative out of the specified terminal.

TTL input dc characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

TTL input voltage high

2.0

V

TTL input voltage low

0.8

V

TTL input high current

VIH = 2.4 V

3

10

µA

TTL input low current

VIL = 0.4 V

1

µA

NOTE 1: All voltages are with respect to GND. Current is positive into and negative out of the specified terminal.