Datasheet

TPS40055-EP
www.ti.com SGLS310D –JULY 2005–REVISED FEBRUARY 2012
ELECTRICAL CHARACTERISTICS (continued)
T
A
= –55°C to 125°C, V
IN
= 24 V
dc
, R
T
= 90.9 kΩ, I
KFF
= 150 µA, f
SW
= 500 kHz, all parameters at zero power dissipation
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
OH
High-level output voltage, LDRV I
LDRV
= –0.1 A BP10 BP10 V
–1.8 –1
V
OL
Low-level output voltage, LDRV I
LDRV
= 0.1 A 0.6 V
Minimum controllable pulse width 100 160 ns
SS/SD SHUTDOWN
V
SD
Shutdown threshold voltage Outputs off 85 125 170 mV
V
EN
Device active threshold voltage 180 210 260 mV
BOOST REGULATOR
V
BOOST
Output voltage V
IN
= 24 V 30.8 32.2 33.9 V
SW NODE
I
LEAK
Leakage current
(4)
35 µA
THERMAL SHUTDOWN
Shutdown temperature
(4)
165
T
SD
°C
Hysteresis
(4)
20
UVLO
V
UVLO
KFF programmable threshold voltage R
KFF
= 28.7 kΩ 6.85 7.5 7.95
UVLO, fixed 7.05 7.5 7.9 V
V
DD
UVLO, hysteresis 0.46
(4) Ensured by design. Not production tested.
TYPICAL CHARACTERISTICS
OFFSET VOLTAGE (VLim vs SW)
TEMPERATURE
Figure 1.
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