Datasheet

TPS51218
www.ti.com SLUS935B –MAY 2009– REVISED FEBRUARY 2012
ELECTRICAL CHARACTERISTICS (continued)
over recommended free-air temperature range, V5IN=5V. (Unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
PROTECTION: CURRENT SENSE
I
TRIP
TRIP source current V
TRIP
= 1V, T
A
= 25°C 9 10 11 μA
TRIP current temperature
TC
ITRIP
On the basis of 25°C 4700 ppm/°C
coeffficient
Current limit threshold setting
V
TRIP
V
TRIP-GND
Voltage 0.2 3 V
range
V
TRIP
= 3.0 V 355 375 395
V
OCL
Current limit threshold V
TRIP
= 1.6 V 185 200 215 mV
V
TRIP
= 0.2 V 17 25 33
V
TRIP
= 3.0 V –395 –375 –355
V
OCLN
Negative current limit threshold V
TRIP
= 1.6 V –215 –200 –185 mV
V
TRIP
= 0.2 V –33 –25 –17
Positive 3 15
Adaptive zero cross adjustable
V
AZCADJ
mV
range
Negative –15 –3
PROTECTION: UVP AND OVP
V
OVP
OVP trip threshold OVP detect 115% 120% 125%
t
OVPDEL
OVP propagation delay time 50-mV overdrive 1 μs
V
UVP
Output UVP trip threshold UVP detect 65% 70% 75%
Output UVP propagation delay
t
UVPDEL
0.8 1 1.2 ms
time
t
UVPEN
Output UVP enable delay time From Enable to UVP workable 1.0 1.2 1.4 ms
UVLO
Wake up 4.20 4.38 4.50
V
UVV5IN
V5IN UVLO threshold V
Shutdown 3.7 3.93 4.1
THERMAL SHUTDOWN
Shutdown temperature
(3)
145
T
SDN
Thermal shutdown threshold °C
Hysteresis
(3)
10
(3) Ensured by design. Not production tested.
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