TPS2359RHHT datasheet(3/51 Pages) TI

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ELECTRICAL CHARACTERISTICS

(1)

TPS2359

www.ti.com ................................................................................................................................................... SLUS792D – FEBRUARY 2008 – REVISED JUNE 2008

IN3A = IN3B = VDD3A = VDD3B = 3.3 V. IN12A = IN12B = SENPA = SENPB = SENMA = SENMB = SETPA = SETPB = 12

V. EN3A = EN3B = AGND = GNDA = GNDB = 0 V. SUM12A = SUM12B = 6.8 k

Ω to ground. SUM3A = SUM3B = 3.3 kΩ to

ground. All other pins open. All I2C bits at default values. Over free air temperature operating range and all voltages

referenced to AGND, unless otherwise noted. over operating free-air temperature range (unless otherwise noted)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ENABLE Inputs

Threshold voltage, falling edge

1.2

1.3

1.4

Hysteresis(2)

Pullup current2

EN3x = 0 V

µA

Input bias current

EN3x = 5 V

3.3-V turn off time

EN3x deasserts to VOUT3x < 1.0 V, COUT = 0 µF

µs

EN3x deasserts to VOUT12x < 1.0 V, COUT = 0 µF,

12-V turn off time

QGATE = 35 nF

VINT

Output voltage

0 < IVINT < 50 µA

2.3

2.8

Power GOOD Comparators

12xPG, falling OUT12x

10.2

10.5

10.8

Threshold voltage

3xPG, falling OUT3x

2.7

2.8

2.9

12xPG, measured at OUT12x

130

Hysteresis

3xPG, measured at OUT3x

Fault Timer

Minimum fault time

3xFT[4:0] = 12xFT[4:0] = 00001B

Fault time bit weight

0.5

Timer duty cycle

= (fault time) / (retry period)

1.4%

1.5%

1.6%

12-V Summing node

VSENMx = 10.8 – 13.2 V, VSENPx = VSENMx + 50

Input referred offset

–2

mV, measure VSETx – VSENMx

Summing threshold

12xCL[3:0] = 1111B, VPASSx = 15 V

0.66

0.675

0.69

Leakage current

VSETx = VSENMx – 10 mV

µA

12-V Current limit

RSUMx = 6.8 kΩ, RSETx = 422 Ω, increase ILOADx

Current limit threshold

and measure VSENPx – VSENMx when VPASSx = 15

47.5

52.5

Sink current in current limit

VSUMx = 1 V, VPASSx = 12 V, measure IPASSx

µA

Fast trip threshold

Measure VSENPx – VSENMx

100

120

Fast turn-off delay(2)

20-mV overdrive, CPASSx = 0 pF, tp50-50

200

300

Bleed down resistance

VOUT = 6 V

1.1

1.6

2.1

Ω

Bleed down threshold

100

130

Timer start threshold

VPASSx – VINx when fault timer starts

(1)

When setting an address bit to a logic 1 the pin should be connected to VINT.

(2)

Not production tested.

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