Datasheet
TPS51117
SLVS631B –DECEMBER 2005–REVISED SEPTEMBER 2009......................................................................................................................................
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ELECTRICAL CHARACTERISTICS (Continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INTERNAL BST DIODE
V
FBST
Forward voltage V
V5DRV-VBST
, IF = 10 mA, T
A
= 25°C 0.7 0.8 0.9 V
I
VBSTLK
VBST leakage current VBST = 34 V, LL = 28 V 0.1 1 μA
UVLO/LOGIC THRESHOLD
Wake up 3.7 3.9 4.1 V
V
UVLO
V5FILT UVLO Threshold
Hysteresis 200 300 400 mV
EN_PSV low 0.7 1.0 1.3 V
Hysteresis 150 200 250 mV
EN_PSV logic input
V
EN_PSV
EN_PSV float (set PWM_only mode) 1.7 1.95 2.25 V
voltage
EN_PSV high (set Auto_skip mode) 2.4 2.65 2.9 V
Hysteresis 100 175 250 mV
I
EN_PSV
EN_PSV source current EN_PSV = GND, absolute value
(1)
1 μA
POWERGOOD COMPARATOR
PG in from lower (PGOOD goes high) 92.5% 95% 97.5%
PG low hysteresis (PGOOD goes low) –4% –5.5% –7%
V
THPG
PG threshold
PG in from higher (PGOOD goes high) 102% 105% 107%
PG high hysteresis (PGOOD goes low) 4% 5.5% 7%
I
PGMAX
PG sink current PGOOD = 0.5 V 2.5 7.5 mA
T
PGDEL
PG delay Delay for PGOOD in 45 63 85 μs
CURRENT SENSE
I
TRIP
TRIP source current V
TRIP
< 0.3 V, T
A
= 25°C 9 10 11 μA
ITRIP temperature
T
CITRIP
On the basis of 25°C 4500 ppm/°C
coefffecient
Current limit threshold
V
Rtrip
V
TRIP-GND
voltage
(1)
, all temperatures 30 200 mV
range setting range
Overcurrent limit
V
OCLoff
(V
TRIP-GND
-V
PGND-LL
) voltage V
TRIP-GND
= 60 mV –10 0 10 mV
comparator offset
Negative overcurrent limit (V
TRIP-GND
-V
LL-PGND
) voltage V
TRIP-GND
= 60 mV,
V
UCLoff
–9.5 0.5 10.5 mV
comparator offset EN_PSV = float
Zero crossing comparator
V
ZCoff
V
PGND-LL
voltage, EN_PSV = 3.3 V –9.5 0.5 10.5 mV
offset
UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
V
OVP
VFB OVP trip threshold OVP detect 111% 115% 119%
VFB OVP propagation
T
OVPDEL
See
(1)
1.5 μs
delay
UVP detect 65% 70% 75%
V
UVP
VFB UVP trip threshold
Hysteresis 10%
T
UVPDEL
VFB UVP delay 22 32 42 μs
T
UVPEN
UVP enable delay After 1.7 × T
SS
, UVP protection engaged 1.4 2 2.6 ms
THERMAL SHUTDOWN
Shutdown temperature
(1)
160 °C
Thermal shutdown
T
SDN
threshold
Hysteresis
(1)
12 °C
(1) Ensured by design. Not production tested.
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