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TPS54426 Datasheet(PDF) 4 Page - Texas Instruments

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Part # TPS54426
Description  4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT??Converter with Eco-Mode?
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54426 Datasheet(HTML) 4 Page - Texas Instruments

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TPS54426
SLVSAD6 – AUGUST 2010
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
THERMAL SHUTDOWN
Shutdown temperature (2)
165
TSDN
Thermal shutdown threshold
°C
Hysteresis (2)
30
ON-TIME TIMER CONTROL
TON
On time
VIN = 12 V, VO = 1.05 V
145
ns
TOFF(MIN)
Minimum off time
TA = 25°C, VFB = 0.7 V
260
310
ns
SOFT START
ISSC
SS charge current
VSS = 0 V
1.4
2.0
2.6
mA
ISSD
SS discharge current
VSS = 0.5 V
0.1
0.2
mA
POWER GOOD
VFB rising (good)
85
90
95
%
VTHPG
PG threshold
VFB falling (fault)
85
%
IPG
PG sink current
PG = 0.5 V
2.5
5
mA
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VOVP
Output OVP trip threshold
OVP detect
115
120
125
%
TOVPDEL
Output OVP prop delay
10
ms
UVP detect
60
65
70
%
VUVP
Output UVP trip threshold
Hysteresis
10
%
TUVPDEL
Output UVP delay
0.25
ms
TUVPEN
Output UVP enable delay
Relative to soft-start time
x 1.7
UVLO
Wake up VREG5 voltage
3.55
3.8
4.05
VUVLO
UVLO threshold
V
Hysteresis VREG5 voltage
0.23
0.35
0.47
(2)
Not production tested.
4
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54426


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