Datasheet

TPS2490
TPS2491
SLVS503D –NOVEMBER 2003–REVISED JULY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and
voltage range, V
TIMER
= 0 V, and all outputs unloaded; typical specifications are at T
J
= 25°C, V
VCC
= 48 V, V
TIMER
= 0 V, and
all outputs unloaded; positive currents are into pins.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER GOOD OUTPUT (PG)
I
PG
= 2 mA 0.1 0.25 V
V
PG_L
Low voltage (sinking)
I
PG
= 4 mA 0.25 0.5 V
PG threshold voltage, V
OUT
rising, PG goes
V
PGTL
V
SENSE
= V
VCC
, measure V
(VCC-OUT)
0.8 1.25 1.7 V
open drain
PG threshold voltage, V
OUT
falling, PG goes
VPGTH V
SENSE
= V
VCC
, measure V
(VCC-OUT)
2.2 2.7 3.2 V
low
ΔV
PGT
PG threshold hysteresis voltage, V
(SENSE-OUT)
V
SENSE
= V
VCC
1.4 V
PG deglitch delay, detection to output, rising
t
DPG
V
SENSE
= V
VCC
5 9 15 ms
and falling edges
Leakage current, PG false, open drain 10 µA
OUTPUT VOLTAGE FEEDBACK INPUT (OUT)
V
OUT
= V
VCC
, V
EN
= Hi, sinking 8 20 µA
I
OUT
Bias current
V
OUT
= GND, V
EN
= Lo, sourcing 18 40 µA
ENABLE INPUT (EN)
V
EN_H
Threshold, V
EN
going high 1.32 1.35 1.38 V
V
EN_L
Threshold, V
EN
going low 1.22 1.25 1.28 V
V
EN
hysteresis 100 mV
Leakage current V
EN
= 48 V 1 µA
INPUT SUPPLY UVLO (VCC)
V
VCC
turn on Rising 8.4 8.8 V
V
VCC
turn off Falling 7.5 8.3 V
Hysteresis 75 mV
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