Datasheet

RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
data sheet
TPS2375
TPS2376
TPS2377
www.ti.com ............................................................................................................................................................ SLVS525B – APRIL 2004 – REVISED APRIL 2008
MIN MAX UNIT
VDD, PG, RTN 0 57 V
Input voltage range
UVLO 0 5 V
Operating current range (sinking) RTN 0 350 mA
Classification resistor
(1)
CLASS 255 4420 Ω
R
(ILIM)
Inrush limit program resistor
(1)
62.5 500 k Ω
Sinking current PG 0 2 mA
T
J
Operating junction temperature -40 125 ° C
T
A
Operating free – air temperature -40 85 ° C
(1) Voltage should not be eternally applied to CLASS and ILIM.
V
(VDD)
= 48 V, R
(DET)
= 24.9 k Ω , R
(CLASS)
= 255 Ω , R
(ILIM)
= 178 k Ω , and – 40 ° C ≤ T
J
≤ 125 ° C, unless otherwise noted. Positive
currents are into pins. V
(UVLO)
= 0 V for classification and V
(UVLO)
= 5 V otherwise for the TPS2376. Typical values are at 25 ° C.
All voltages are with respect to VSS unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DETECTION
DET open, V
(VDD)
= V
(RTN)
= 1.9 V, measure
Offset current 0.3 3 µA
I
(VDD)
+ I
(RTN)
DET open, V
(VDD)
= V
(RTN)
= 10.1 V, measure
Sleep current 4 12 µA
I
(VDD)
+ I
(RTN)
DET leakage current V
(DET)
= V
(VDD)
= 57 V, measure I
(DET)
0.1 5 µA
V
(RTN)
= V
(VDD)
, V
(VDD)
= 1.4 V 53.7 56 58.3 µA
R
(DET)
= 24.9 k Ω ,
Detection current
measure I
(VDD)
+ I
(RTN)
+
V
(VDD)
= 10.1 V 395 410 417 µA
I
(DET)
CLASSIFICATION
R
(CLASS)
= 4420 Ω , 13 ≤ V
(VDD)
≤ 21 V 2.2 2.4 2.8
R
(CLASS)
= 953 Ω , 13 ≤ V
(VDD)
≤ 21 V 10.3 10.6 11.3
I
(CLASS)
Classification current
(1)
R
(CLASS)
= 549 Ω , 13 ≤ V
(VDD)
≤ 21 V 17.7 18.3 19.5 mA
R
(CLASS)
= 357 Ω , 13 ≤ V
(VDD)
≤ 21 V 27.1 28.0 29.5
R
(CLASS)
= 255 Ω , 13 ≤ V
(VDD)
≤ 21 V 38.0 39.4 41.2
V
(CL_ON)
Classification lower threshold Regulator turns on, V
(VDD)
rising 10.2 11.3 13.0 V
V
(CU_OFF)
Regulator turns off, V
(VDD)
rising 21 21.9 23 V
Classification upper threshold
V
(CU_H)
Hysteresis 0.5 0.78 1 V
Leakage current V
(CLASS)
= 0 V, V
(VDD)
= 57 V 1 µA
PASS DEVICE
r
DS(on)
On resistance I
(RTN)
= 300 mA 0.58 1.0 Ω
V
(VDD)
= V
(RTN)
= 30 V, 15
Leakage current µA
V
(UVLO)
= 0 V (TPS2376)
Current limit V
(RTN)
= 1 V 405 461 515 mA
I
(LIM)
Inrush limit V
(RTN)
= 2 V, R
(ILIM)
= 178 k Ω 100 130 180 mA
V
(RTN)
falling, R
(ILIM)
= 178 k Ω , inrush 85% 91% 100%
Inrush current termination
(2)
state → normal operation
R
(ILIM)
= 69.8 k Ω , V
(RTN-VSS)
= 5 V, 15 25
Current rise time into inrush I
(RTN)
= 30 mA → 300 mA, V
(VDD)
increasing µs
past upper UVLO
Apply load ∞ Ω → 20 Ω , time measured to 2 2.5
Current limit response time µs
I
(RTN)
= 45 mA
Leakage current, ILIM V
(VDD)
= 15 V, V
(UVLO)
= 0 V 1 µA
(1) Classification is tested with exact resistor values. A 1% tolerance classification resistor assures compliance with IEEE 802.3af limits.
(2) This parameter specifies the RTN current value, as a percentage of the steady state inrush current, below which it must fall to make PG
assert (open-drain).
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