Datasheet

TPS2359
www.ti.com SLUS792H –FEBRUARY 2008–REVISED MAY 2013
ELECTRICAL CHARACTERISTICS
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 kΩ 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, -40°C ≤ T
A
≤ 85°C, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
ENABLE Inputs
Threshold voltage, falling edge 1.2 1.3 1.4 V
Hysteresis 20 50 80 mV
Pullup current EN3x = 0 V 5 8 15
μA
Input bias current EN3x = 5 V 1 5
3.3-V turn off time EN3x deasserts to V
OUT3x
< 1.0 V, C
OUT
= 0 μF 10
μs
EN3x deasserts to V
OUT12x
< 1.0 V, C
OUT
= 0 μF,
12-V turn off time 20
Q
GATE
= 35 nF
VINT
Output voltage 0 < I
VINT
< 50 μA 2 2.3 2.8 V
Power GOOD Comparators
12xPG, falling OUT12x 10.2 10.5 10.8
Threshold voltage V
3xPG, falling OUT3x 2.7 2.8 2.9
12xPG, measured at OUT12x 130
Hysteresis mV
3xPG, measured at OUT3x 50
Fault Timer
Fault time bit weight 3xFT[4:0] = 12xFT[4:0] = 00001B 0.45 ms
Timer duty cycle = (fault time) / (retry period) 0.70% 0.77% 0.80%
12-V Summing node
V
SENMx
= 10.8 – 13.2 V, V
SENPx
= V
SENMx
+
Input referred offset –2 2 mV
50 mV, measure V
SETx
– V
SENMx
Summing threshold 12xCL[3:0] = 1111B, VPASSx = 15 V 0.66 0.675 0.69 V
Leakage current VSETx = VSENMx – 10 mV 1 μA
12-V Current limit
R
SUMx
= 6.8 kΩ, R
SETx
= 422 Ω, increase I
LOADx
Current limit threshold and measure V
SENPx
– V
SENMx
when V
PASSx
= 15 47.5 50 52.5 mV
V
Sink current in current limit V
SUMx
= 1 V, V
PASSx
= 12 V, measure I
PASSx
20 40 μA
Fast trip threshold Measure V
SENPx
– V
SENMx
80 100 120 mV
Fast turn-off delay 20-mV overdrive, C
PASSx
= 0 pF, t
p50-50
200 300 ns
Bleed down resistance V
OUT
= 6 V 1.1 1.6 2.1 kΩ
Bleed down threshold 75 100 130 mV
Timer start threshold V
PASSx
– V
INx
when fault timer starts 5 6 7 V
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