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TPS51123RGET Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS51123RGET
Description  Dual-Synchronous, Step-Down Controller with Out-of-Audio??Operation and 100-mA LDOs for Notebook System Power
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS51123RGET Datasheet(HTML) 5 Page - Texas Instruments

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TPS51123
www.ti.com ........................................................................................................................................................................................... SLUS890 – DECEMBER 2008
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
PROTECTION: CURRENT SENSE
ITRIP
TRIPx source current
VTRIPx = 920 mV, TA= 25°C
9.4
10
10.6
µA
TRIPx current temperature
TCITRIP
On the basis of 25°C
4500
ppm/°C
coefficient
((VTRIPx-GND/9)-24 mV -VGND-LLx) voltage,
VOCLoff
OCP comparator offset
-8
0
8
VTRIPx-GND = 920 mV
VOCL(max) Maximum OCL setting
VTRIPx = 5 V
185
205
225
mV
Zero cross detection
VZC
VGND-LLx voltage
-5
0
5
comparator offset
VTRIP
Current limit threshold
VTRIPx-GND voltage
(2)
0.515
2
V
PROTECTION: UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VOVP
OVP trip threshold
OVP detect
110%
115%
120%
TOVPDEL
OVP prop delay
2
µs
UVP detect
55%
60%
65%
VUVP
Output UVP trip threshold
Hysteresis
10%
TUVPDEL
Output UVP prop delay
20
32
40
µs
TUVPEN
Output UVP enable delay
1.4
2
2.6
ms
UNDERVOLTAGE LOCKOUT (UVLO)
Wake up
4.1
4.2
4.3
VUVVREG5 VREG5 UVLO threshold
Hysteresis
0.38
0.43
0.48
V
VUVVREG3 VREG3 UVLO threshold
Shutdown (2)
VO2-1
THERMAL SHUTDOWN
Shutdown temperature (2)
150
TSDN
Thermal shutdown threshold
°C
Hysteresis (2)
10
(2)
Ensured by design. Not production tested.
Copyright © 2008, Texas Instruments Incorporated
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