Datasheet

TPS2492
TPS2493
SLUSA65C –JULY 2010–REVISED JANUARY 2013 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
9 V ≤ V
VCC
≤ 80 V, -40°C ≤ T
J
≤ 125°C, V
TIMER
= 0 V and all outputs unloaded. Typical specification are at T
J
= 25°C, V
VCC
=
48 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Gate Drive Output (GATE)
GATE sourcing current V
SENSE
= V
VCC
; V
(GATE-OUT)
= 7 V; V
UVEN
= Hi 15 22 35 µA
V
UVEN
= Lo; V
GATE
= V
VCC
1.8 2.4 2.8
I
GATE
GATE sinking current mA
V
UVEN
= Hi; V
GATE
= V
VCC
; V
VCC
- V
SENSE
=
75 125 250
200 mV
V
UVEN
= Hi, VCC = SENSE = OUT, measure
V
GATE
GATE output 12 16 V
V
GATE
-V
OUT
Propagation delay: UVEN going V
UVEN
= 0 → 2.5 V, 50% of V
UVEN
to 50% of
t
D_ON
25 40
high to GATE output high V
GATE
, V
OUT
= V
VCC
, R
(GATE-OUT)
= 1 MΩ
V
UVEN
= 2.5 V → 0 V, 50% of V
UVEN
to 50%
Propagation delay: UVEN going
t
D_OFF
of V
GATE
, V
OUT
= V
VCC
, R
(GATE-OUT)
= 1 MΩ, 0.5 1
low to GATE output low µs
t
FALL
< 0.1 µs
V
TIMER
: 0 → 5 V, t
RISE
< 0.1 µs. 50% of
Propagation delay: TIMER expires
t
D_FAULT
V
TIMER
to 50% of V
GATE
, V
OUT
= VCC , 0.8 1
to GATE output low
R
(GATE-OUT)
= 1 MΩ,
Power Good Output (PG)
I
PG
= 2 mA 0.1 0.25
Low voltage (sinking)
I
PG
= 4 mA 0.25 0.5
PG threshold voltage; V
OUT
rising;
V
SENSE
= V
VCC
; measure V
(VCC-OUT)
0.8 1.25 1.7
PG goes low
V
PG threshold voltage; V
OUT
V
SENSE
= V
VCC
; measure V
(VCC-OUT)
2.2 2.7 3.2
falling; PG goes open drain
PG threshold hysteresis voltage;
V
SENSE
= V
VCC
1.4
V
(SENSE-OUT)
PG deglitch delay; detection to
t
DPG
V
SENSE
= V
VCC
5 9 15 ms
output; rising and falling edges
I
LEAKAGE
Leakage current; PG false open drain 10 µA
Overvoltage Input (OV)
V
OV_H
OV rising 1.31 1.35 1.39 V
Threshold voltage
Hysteresis 70 90 110 mV
I
LEAKAGE
Leakage current (sinking) V
OV
= 5 V 1 µA
t
OFF
Turn off time V
OV
= 0 → 2.5 V to V
GS
< 1 V, C
GATE
= 2 nF 2
µs
Maximum duration of OV strong
Gate pull down 40 100 220
pull down
Output Voltage Feedback (OUT)
V
OUT
= V
VCC
, V
UVEN
= Hi; sinking 8 20
I
OUT
Bias current µA
V
OUT
= GND; V
UVEN
= Lo; sourcing 18 40
Load Current Monitor (IMON) Output
Maximum output voltage V
CC
– V
SENSE
= 200 mV 2.6 2.8 3 V
I
SOURCE
Source current 1.9 mA
I
SINK
Sink current 60 µA
Gain (V
IMON
/V
(VCC-SENSE)
) 46 48 50 V/V
V
OFFSET
Offset voltage -50 -5 30 mV
Error relative to curve fit, 5 mV < (V
CC
–
Linearity
(1)
0.3%
V
SENSE
)
Output Ripple
(1)
8 mV
PP
(1) These parameters are provided for reference only, and do not constitute part of TI's published device specifications for purposes of TI's
product warranty.
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