Datasheet

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PoE SECTION
TPS23750
TPS23770
SLVS590B – JULY 2005 – REVISED FEBRUARY 2008
DC/DC CONTROLLER SECTION (continued)
RTN = V
SS
for this section only.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
SENP-SEN
= 1.5 V, TMR = RSN, I
FB
= 0 µ A and 10 µ A,
Translator output resistance 11.25 15 18.75 k Ω
R
FB
= Δ V
FB
/ Δ I
FB
SEN sinking current V
SENP-SEN
= 1.50 V, V
TMR
= RSN 1 µ A
SENP sinking current V
SENP-SEN
= 1.50 V, V
TMR
= RSN 17 22.5 28 µ A
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DETECTION (DET)
Offset current DET open, V
DD
= V
RTN
= 1.9 V, Measure I
VDD
+ I
RTN
+ I
SENP
0.45 4 µ A
Sleep current DET open, V
DD
= V
RTN
= 10.1 V, Measure I
VDD
+ I
RTN
+ I
SENP
5.6 12 µ A
DET leakage current V
DET
= V
DD
= 57 V, Measure I
DET
0.3 5 µ A
V
DD
= 1.4 V 51.5 55 58.7
RTN = V
DD
, Measure I
VDD
+ I
RTN
+
Detection current µ A
I
DET
+ I
SENP
V
DD
= 10.1 V 395 411 417
CLASSIFICATION (CLASS)
RTN = V
DD
, Measure I
VDD
+ I
RTN
+ I
DET
+ I
SENP
R
CLASS
= 4420 Ω , 13 ≤ V
DD
≤ 21 V 2.2 2.5 2.8
R
CLASS
= 953 Ω , 13 ≤ V
DD
≤ 21 V 10.3 10.6 11.3
I
CLASS
Classification current mA
R
CLASS
= 549 Ω , 13 ≤ V
DD
≤ 21 V 17.7 18.3 19.5
R
CLASS
= 357 Ω , 13 ≤ V
DD
≤ 21 V 27.1 28.0 29.5
R
CLASS
= 255 Ω , 13 ≤ V
DD
≤ 21 V 38.0 39.4 41.2
V
CL_ON
Regulator turns on, V
DD
rising 10.2 11.3 13.0
Classification lower threshold V
V
CL_H
Hysteresis 1 1.75 3
V
CU_OFF
Regulator turns off, V
DD
rising 21 21.9 23
Classification upper threshold V
V
CU_H
Hysteresis 0.5 0.83 1
PASS DEVICE (RTN)
On resistance I
RTN
= 300 mA 0.60 1 Ω
Current limit V
RTN
= 1 V 405 450 515 mA
I
INR
Inrush limit V
RTN
= 1.6 V 100 140 180 mA
CONTROL
Inrush current state termination I
RTN
falling from I
INR
, I
RTN
/I
INR
0.85 1.00
UVLO
V
UVLO_R
V
DD
rising, monitor I
RTN
38.4 39.3 40.4
V
UVLO_F
Standard UVLO threshold V
DD
falling, monitor I
RTN
29.6 30.5 31.5 V
Hysteresis 8.3 8.8 9.1
V
UVLO_R
V
DD
rising, monitor I
RTN
34.1 35.1 36.0
V
UVLO_F
Legacy UVLO threshold V
DD
falling, monitor I
RTN
29.7 30.5 31.4 V
Hysteresis 4.3 4.5 4.8
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