Datasheet

TPS51124
SLVS616B –NOVEMBER 2005–REVISED SEPTEMBER 2010 www.ti.com
ELECTRICAL CHARACTERISTICS (Continued)
over operating free-air temperature range, V5IN = V5FILT = 5 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
UVLO/LOGIC THRESHOLD
Wake up 3.7 4.0 4.3 V
V
UV5VFILT
V5FILT UVLO threshold
Hysteresis 0.2 0.3 0.4 V
Wake up 1.0 1.3 1.5 V
V
EN
ENx threshold
Hysteresis 0.2 V
I
EN
ENx input current Absolute value
(1)
0.02 0.1 mA
Fast
(1)
V5FILT
V
–0.3
V
TONSEL
TONSEL threshold Medium
(1)
V5FILT
2 V
–1.0
Slow
(1)
0.5 V
TONSEL=0V, current out of the pin
(1)
1 mA
I
TONSEL
TONSEL input current
TONSEL=5V, current in to the pin
(1)
1 mA
CURRENT SENSE
I
TRIP
TRIP source current VTRIPx < 0.3 V, T
A
= 25°C 9 10 11 mA
TC
ITRIP
I
TRIP
temperature coeffficent On the basis of 25°C
(1)
4200 ppm/°C
(V
TRIPx-GND
– V
PGNDx-LLx
) voltage,
V
OCLoff
OCP compensation offset –10 0 10 mV
V
TRIPx-GND
= 60 mV
Zero cross detection comparator VPGNDx-LLx voltage, PGOODx = Hi
(1)
V
ZC
0.5 mV
offset
Current limit threshold setting V
TRIPx-GND
voltage, all temperatures
(1)
V
Rtrip
30 200 mV
range
POWER-GOOD COMPARATOR
PG in from lower (PGOODx goes hi) 92.5% 95% 97.5%
PG low hysteresis (PGOODx goes low) –5%
V
THPG
PG threshold
PG in from higher (PGOODx goes hi) 102.5% 105% 107.5%
PG high hysteresis (PGOODx goes low) 5%
I
PGMAX
PG sink current PGOODx = 0.5 V 2.5 5.0 mA
T
PGDEL
PG delay Delay for PG in 400 510 620 ms
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 < 20 ms) 10%
t
UVPDEL
Output UVP delay 20 32 40 ms
t
UVPEN
Output UVP enable delay After 1.7 × Tss, UVP protection engaged 1.4 2 2.4 ms
THERMAL SHUTDOWN
Shutdown temperature
(1)
160
T
SDN
Thermal shutdown threshold °C
Hysteresis
(1)
10
(1) Ensured by design. Not production tested.
4 Submit Documentation Feedback Copyright © 2005–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS51124