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TPS51125 Datasheet(PDF) 5 Page - Texas Instruments

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Part No. TPS51125
Description  Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA LDOs for Notebook System Power
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TPS51125 Datasheet(HTML) 5 Page - Texas Instruments

 
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TPS51125
SLUS786A – OCTOBER 2007 – REVISED NOVEMBER 2007
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Logic Threshold and Setting Conditions
Shutdown
0.4
VEN0
EN0 setting voltage
Enable, VCLK = off
0.8
1.6
V
Enable, VCLK = on
2.4
VEN0 = 0.2 V
2
3.5
5
IEN0
EN0 current
µA
VEN0 = 1.5 V
1
1.75
2.5
Shutdown
350
400
450
ENTRIP1, ENTRIP2
VEN
mV
threshold
Hysteresis
10
30
60
200 kHz/250 kHz
1.5
245 kHz/305 kHz
1.9
2.1
VTONSEL
TONSEL setting voltage
300 kHz/375 kHz
2.7
3.6
365 kHz/460 kHz
4.7
V
PWM only
1.5
VSKIPSEL
SKIPSEL setting voltage
Auto skip
1.9
2.1
OOA auto skip
2.7
Protection: Current Sense
IENTRIP
ENTRIPx source current
VENTRIPx = 920 mV, TA= 25°C
9.4
10
10.6
µA
ENTRIPx current temperature
TCIENTRIP
On the basis of 25
°C
4500
ppm/
°C
coefficient
((VENTRIPx-GND/9)-24 mV -VGND-LLx) voltage,
VOCLoff
OCP comparator offset
-8
0
8
VENTRIPx-GND = 920 mV
VOCL(max)
Maximum OCL setting
VENTRIPx = 5 V
185
205
225
mV
Zero cross detection
VZC
VGND-LLx voltage
-5
0
5
comparator offset
VENTRIP
Current limit threshold
VENTRIPx-GND voltage,
(2)
0.515
2
V
Protection: UVP & OVP
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
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 © 2007, Texas Instruments Incorporated
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