Datasheet

TPS53114
www.ti.com SLVS887B –APRIL 2009–REVISED OCTOBER 2010
ELECTRICAL CHARACTERISTICS (continued)
over recommended free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
ON-TIME TIMER CONTROL
T
ONL
On Time SW = 12V, VO = 1.8V, FSEL = 0V 390 ns
T
ONH
On Time SW = 12V, VO = 1.8V, FSEL = V5FILT 139 ns
T
OFFL
Min off time SW = 0.7V, T
A
= 25°C, VFB = 0.7V, FSEL = 0V 285 ns
T
OFFH
Min off time SW = 0.7V, T
A
= 25°C, VFB = 0.7V, FSEL = V5FILT 216 ns
SOFT START
I
ssc
SS charge current VSS = 0V , SOURCE CURRENT 1.4 2.0 2.6 mA
I
ssd
SS discharge current VSS = 0.5V , SINK CURRRENT 100 150 mA
UVLO
V5FILT rising 3.7 4.0 4.3 V
V
UV5VFILT
V5FILT UVLO threshold
Hysteresis 0.2 0.3 0.4
LOGIC THRESHOLD
V
ENH
EN H-level threshold voltage EN 2.0 V
V
ENL
EN L-level threshold voltage EN 0.3 V
CURRENT SENSE
I
TRIP
TRIP source current VTRIP = 0.1V, T
A
= 25°C 8.5 10 11.5 mA
TC
ITRIP
I
TRIP
temperature coefficient on the basis of 25°C 4000 ppm/°C
(V
TRIP-GND
-V
PGND-SW
) voltage, –10 0 10
mV
V
TRIP-GND
= 60mV, T
A
= 25°C
V
OCLoff
OCP compensation offset
(V
TRIP-GND
-V
PGND-SW
) voltage, –15 15
mV
VTRIP-GND = 60mV
V
Rtrip
Current limit threshold setting V
TRIP-GND
voltage 30 200 mV
range
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
V
OVP
Output OVP trip threshold OVP detect 110 115 120 %
T
OVPDEL
Output OVP prop delay 1.5 ms
UVP detect 65 70 75 %
V
UVP
Output UVP trip threshold
Hysteresis (recovery <20ms) 10 %
T
UVPDEL
Output UVP delay 17 30 40 ms
T
UVPEN
Output UVP enable delay UVP enable delay / soft start time X1.4 X1.7 X2.0
THERMAL SHUTDOWN
Shutdown temperature
(1)
150 °C
T
SDN
Thermal shutdown threshold
Hysteresis
(1)
20
(1) Ensured by design. Not production tested.
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