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TPS2490
TPS2491
SLVS503D NOVEMBER 2003REVISED 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癈, 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
擵
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
礎
OUTPUT VOLTAGE FEEDBACK INPUT (OUT)
V
OUT
= V
VCC
, V
EN
= Hi, sinking
8
20
礎
I
OUT
Bias current
V
OUT
= GND, V
EN
= Lo, sourcing
18
40
礎
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
礎
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
4
Copyright ?20032012, Texas Instruments Incorporated
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