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| TPS51123_15 Datasheet, PDF (6/37 Pages) Texas Instruments – Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA LDOs for Notebook System Power | |||
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TPS51123
SLUS890E â DECEMBER 2008 â REVISED JANUARY 2013
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER
CONDITIONS
PROTECTION: CURRENT SENSE
ITRIP
TCITRIP
TRIPx source current
TRIPx current temperature
coefficient
VTRIPx = 920 mV, TA= 25°C
On the basis of 25°C
VOCLoff OCP comparator offset
((VTRIPx-GND/9)-24 mV -VGND-LLx) voltage, VTRIPx-
GND = 920 mV
VOCL(max) Maximum OCL setting
VTRIPx = 5 V
VZC
Zero cross detection
comparator offset
VGND-LLx voltage
VTRIP
Current limit threshold
VTRIPx-GND voltage (2)
PROTECTION: UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VOVP
tOVPDEL
VUVP
OVP trip threshold
OVP prop delay
Output UVP trip threshold
OVP detect
UVP detect
Hysteresis
tUVPDEL Output UVP prop delay
tUVPEN Output UVP enable delay
UNDERVOLTAGE LOCKOUT (UVLO)
VUVVREG5 VREG5 UVLO threshold
VUVVREG3 VREG3 UVLO threshold
THERMAL SHUTDOWN
TSDN
Thermal shutdown threshold
Wake up
Hysteresis
Shutdown (2)
Shutdown temperature (2)
Hysteresis (2)
(2) Ensured by design. Not production tested.
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MIN
TYP
MAX
UNIT
9.4
-8
185
-5
0.515
10
4500
0
205
0
10.6 μA
ppm/°C
8
225 mV
5
2
V
110%
55%
20
1.4
115%
2
60%
10%
32
2
120%
μs
65%
40 μs
2.6 ms
4.1
4.2
0.38
0.43
VO2-1
4.3
0.48
V
150
°C
10
6
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