259481A Marking, TPS259481AYWPR datasheet(9/56 Pages) TI

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7.6 Switching Characteristics

The output rising slew rate is internally controlled and constant across the entire operating voltage range to ensure the

turn on timing is not affected by the load conditions. The rising slew rate can be adjusted by adding capacitance from

the dVdt pin to ground. As CdVdt is increased it will slow the rising slew rate (SR). See Slew Rate and Inrush Current

Control (dVdt) section for more details. The Turn-Off Delay and Fall Time, however, are dependent on the RC time constant

of the load capacitance (COUT) and Load Resistance (RL). The Switching Characteristics are only valid for the power-up

sequence where the supply is available in steady state condition and the load voltage is completely discharged before the

device is enabled. Typical values are taken at TJ = 25°C unless specifically noted otherwise. ROUT = 100 Ω, COUT = 1 µF

PARAMETER

VIN

CdVdt = Open

CdVdt = 3.3 nF

CdVdt = 6.8 nF

UNITS

tD,ON

Turn on delay

3.5

0.15

0.78

1.31

0.17

1.04

2.04

0.18

1.60

3.44

SRON

Output rising slew

rate

3.5

14.40

1.25

0.58

V/ms

25.30

1.36

0.60

V/ms

38.30

1.44

0.65

V/ms

Rise time

3.5

0.20

2.12

4.59

0.36

7.04

17.08

0.47

12.83

27.70

tON

Turn on time

3.5

0.41

2.88

5.89

0.55

8.09

19.14

0.65

14.66

31.20

tD,OFF

Turn off delay

3.5

17.30

µs

15.80

µs

13.50

µs

Fall time

3.5

Depends on ROUT and COUT

µs

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TPS25948

SLVSGT9A – FEBRUARY 2023 – REVISED SEPTEMBER 2023

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