3

UCC3912

°C to 70°C, VIN = 5V,

IMAX = 0.4V, SHTDWN = 2.4V.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Output Section (cont.)

Reverse Leakage Current

520

µA

Initial Start-up Time

(Note 2)

100

µs

Short Circuit Response

(Note 2)

100

ns

Thermal Shutdown

(Note 2)

170

°C

Thermal Hysteresis

(Note 2)

10

°C

DAC Section

Output Leakage

Code = 0000-0011

0

20

µA

Trip Current

Code = 0100

0.1

0.25

0.45

A

Code = 0101

0.25

0.50

0.75

A

Code = 0110

0.5

0.75

1.0

A

Code = 0111

0.75

1.00

1.25

A

Code = 1000

1.0

1.25

1.5

A

Code = 1001

1.25

1.50

1.75

A

Code = 1010

1.5

1.75

2.0

A

Code = 1011

1.7

2.00

2.3

A

Code = 1100

1.9

2.25

2.58

A

Code = 1101

2.1

2.50

2.9

A

Code = 1110

2.3

2.75

3.2

A

Code = 1111

2.5

3.0

3.5

A

Max Output Current

Code = 0000 to 0011

0.02

mA

Max Output Current Over Trip (Current Source

Mode)

Code = 0100 to 1111, IMAX = 0V

0.5

1.0

1.8

A

Max Output Current (Current Source Mode)

3.0

4.0

5.2

A

Timer Section

CT Charge Current

−45.0 −36.0 −22.0

µA

CT Discharge Current

0.72

1.2

1.5

µA

Output Duty Cycle

2.0

3.0

6.0

%

CT Fault Threshold

1.3

1.5

1.7

V

CT Reset Threshold

0.4

0.5

0.6

V

Shutdown Section

Shutdown Threshold

1.1

1.5

1.9

V

Shutdown Hysteresis

100

mV

Input Current

SHTDWN = 1V

100

500

nA

Fault Output Section

Output Leakage Current

500

nA

Low Level Output Voltage

0.4

0.8

V

TTL Input DC Characteristics Section

TTL Input Voltage High

2.0

V

TTL Input Voltage Low

0.8

V

TTL Input High Current

3

10

µA

TTL Input Low Current

1

µA

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

Note 2: Guaranteed by design. Not 100% tested in production.