Datasheet

TPS2378
www.ti.com SLVSB99B –MARCH 2012–REVISED NOVEMBER 2013
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range and voltages with respect to V
SS
(unless otherwise noted)
MIN NOM MAX UNIT
RTN, VDD 0 57
Input voltage range APD to RTN 0 18 V
CDB, T2P to RTN 0 57
RTN 0.85 A
Sinking current
CDB, T2P 2 mA
Resistance CLS
(1)
60 Ω
Junction temperature –40 125 °C
(1) Voltage should not be externally applied to this pin.
ELECTRICAL CHARACTERISTICS
40 V ≤ V
VDD
≤ 57 V, R
DEN
= 24.9 kΩ, V
CDB
, V
CLS
, and V
T2P
open; V
APD
= V
RTN
; –40°C ≤ T
J
≤ 125°C. Positive currents are into
pins. Typical values are at 25°C. All voltages are with respect to V
VSS
unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DETECTION (DEN)
DEN open, V
VDD
= 10.1 V, Measure I
SUPPLY
(VDD, RTN,
Bias current 3 4.8 12 µA
DEN), Not in mark
Measure I
SUPPLY
(VDD, RTN, DEN), V
DD
= 1.4 V 53.8 56.5 58.3
Detection current µA
Measure I
SUPPLY
(VDD, RTN, DEN), V
DD
= 10.1 V, Not in
395 410 417
mark
Disable threshold DEN falling 3 3.7 5 V
V
PD_DIS
Hysteresis 50 113 200 mV
AUXILIARY POWER DETECTION (APD)
V
APDEN
V
APD
rising, measure to V
RTN
1.40 1.50 1.60
Voltage threshold V
V
APDH
Hysteresis, measure to V
RTN
0.27 0.30 0.33
Sinking current V
(APD–RTN)
= 5 V, measure I
APD
1 1.73 3 µA
CLASSIFICATION (CLS)
13 V ≤ V
VDD
≤ 21 V, Measure IV
DD
+ I
DEN
+ I
RTN
R
CLS
= 1270 Ω 1.8 2.17 2.6
R
CLS
= 243 Ω 9.9 10.6 11.2
I
CLS
Classification current
R
CLS
= 137 Ω 17.6 18.6 19.4 mA
R
CLS
= 90.9 Ω 26.5 27.9 29.3
R
CLS
= 63.4 Ω 38 39.9 42.0
V
CL_ON
V
VDD
rising, I
CLS
↑ 11.9 12.5 13.0
Class lower threshold V
V
CL_H
Hysteresis 1.4 1.6 1.7
V
CU_ON
V
VDD
rising, I
CLS
↓ 21 22 23
Class upper threshold V
V
CU_H
Hysteresis 0.5 0.78 0.9
V
MSR
Mark reset threshold V
VDD
falling 3 3.9 5 V
Mark state resistance 2-point measurement at 5 V and 10.1 V 6 10 12 kΩ
Leakage current V
VDD
= 57 V, V
CLS
= 0 V, measure I
CLS
1 µA
PASS DEVICE (RTN)
r
DS(on)
On resistance 0.2 0.42 0.75 Ω
Input bias current V
VDD
= V
RTN
= 30 V, measure I
RTN
30 µA
Current limit V
RTN
=1.5 V 0.85 1 1.2 A
Inrush current limit V
RTN
= 2 V, V
VDD
: 20 V → 48 V 100 140 180 mA
Inrush termination Percentage of inrush current 80% 90% 99%
Foldback threshold V
RTN
rising 11 12.3 13.6 V
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