Datasheet

TPS51219
www.ti.com SLUSAG1B –MARCH 2011– REVISED OCTOBER 2011
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, V
V5
= 5 V, V
MODE
= 0 V, V
EN
= 5 V (unless otherwise noted)
PARAMETER TEST CONDITION MIN TYP MAX UNIT
LOGIC THRESHOLD
I
MODE
MODE source current 15.6 16.7 17.8 μA
MODE 0-1 113 143 173
MODE 1-2 253 283 313
MODE 2-3 433 458 483
V
THMODE
MODE threshold voltage MODE 3-4 644 667 690 mV
MODE 4-5 914 949 984
MODE 5-6 1329 1369 1409
MODE 6-7 1950 2000 2050
V
LL
EN low-level voltage 0.5
V
LH
EN high-level voltage 1.8 V
V
LHYST
EN hysteresis voltage 0.25
I
LLK
EN input leakage current –1 0 1 μA
SOFT START
t
SS
Soft-start time Internal soft-start time 1.1 ms
POWERGOOD COMPARATOR
PGOOD in from higher 106% 108% 110%
PGOOD in from lower 90% 92% 94%
V
THPG
PGOOD threshold
PGOOD out to higher 114% 116% 118%
PGOOD out to lower 82% 84% 86%
I
PG
PGOOD sink current V
PGOOD
= 0.5 V 3 6 mA
Delay for PGOOD in 0.8 1.0 1.2 ms
t
PGDLY
PGOOD delay time
Delay for PGOOD out, with 100 mV over drive 0.25 µs
t
PGCMPSS
PGOOD start-up delay PGOOD comparator wake-up delay 2.5 ms
I
PG(leak)
PGOOD leakage current -1 0 1 µA
CURRENT DETECTION
I
TRIP
TRIP source current T
A
= 25°C, V
TRIP
= 0.4 V, R
DS(on)
sensing 9 10 11 μA
TRIP source current temperature
TC
ITRIP
(2)
R
DS(on)
sensing 4700 ppm/°C
coefficient
(2)
V
TRIP
V
TRIP
voltage range R
DS(on)
sensing 0.2 3 V
V
TRIP
= 3.0 V, R
DS(on)
sensing 360 375 390
V
OCL
Current limit threshold V
TRIP
= 1.6 V, R
DS(on)
sensing 190 200 210 mV
V
TRIP
= 0.2 V, R
DS(on)
sensing 20 25 30
V
TRIP
= 3.0 V, R
DS(on)
sensing –390 –375 –360
V
OCLN
Negative current limit threshold V
TRIP
= 1.6 V, R
DS(on)
sensing –212 –200 –188 mV
V
TRIP
= 0.2 V, R
DS(on)
sensing –30 –25 –20
V
RTRIP
Resistor sense trip voltage Resistor sensing 25 mV
V
ZC
Zero cross detection offset 0 mV
(2) Ensured by design. Not production tested.
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