Datasheet

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TPS51120
SLUS670B – JULY 2005 – REVISED FEBRUARY 2007
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, V
VIN
= 12 V, V
VREG5
= V
V5FILT
= 5 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
(V
VREG5-CS
-V
PGND-LL
) voltage, V
VREG5-CS
= 80mV,
V
OCLoff
OCP Comparator Offset -10 0 10
R
DS(ON)
sense
Current limit threshold setting
V
R(trip)
V
V5FILT
-V
CS
voltage 30 150 mV
range
Zero cross detection Comparator
V
ZC
V
PGNDx
-V
LLx
voltage, SKIPSEL=0V -5 1 5
offset
POWERGOOD COMPARATOR
Power Bad Threshold ± 7% ± 10% ± 13%
V
TH(PG)
PGOOD Threshold
Hysteresis ± 5%
I
PG(MAX
PGOOD Sink Current PGOOD=0.5 V 2.5 5.0 mA
T
PGDEL
PGOOD Delay Timer Delay for PGOOD in, ‘clks’=HK Clock 256 clks
UNDERVOLTAGE and OVERVOLTAGE PROTECTION
V
OVP
VFBx OVP Trip Threshold OVP detect 110% 115% 120%
T
OVPDEL
VFBx OVP Delay Time 2 ms
UVP detect 65% 70% 75%
V
UVP
VFBx UVP Trip Threshold
Hysteresis 6%
T
UVPDEL
VFBx UVP Delay Timer ‘clks’=HK Clock 128 clks
THERMAL SHUTDOWN
Shutdown temperature 145
T
SDN1
Thermal shutdown threshold ° C
Hysteresis 10
7
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