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TPS65281RGVR Datasheet(PDF) 9 Page - Texas Instruments

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Part # TPS65281RGVR
Description  PRECISION ADJUSTABLE CURRENT LIMITED POWER DISTRIBUTION SWITCH WITH 4.5V TO 18V INPUT VOLTAGE, 3A OUTPUT CURRENT SYNCHRONOUS BUCK REGULATOR
PDF  31 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS65281RGVR Datasheet(HTML) 9 Page - Texas Instruments

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background image
VEN_SWx
VOUT_SWx
tD_on tr
90%
10%
50%
50%
90%
tD_off
10%
tf
TPS65281, TPS65281-1
www.ti.com
SLVSBH7B – JULY 2012 – REVISED DECEMBER 2012
ELECTRICAL CHARACTERISTICS (continued)
TJ = 25°C, VIN = 12 V, fSW = 600 kHz, RnFAULT = 100 kΩ (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Fault assertion or de-assertion due to over-
tDEGLITCH(OCP)
Switch over current fault deglitch
7
10
13
ms
current condition
VL_nFAULT
nFAULT pin output low voltage
InFAULT = 1 mA
80
mV
VEN_SWH
EN_SW high level input voltage
EN_SW high level input voltage
2
V
VEN_SWL
EN_SW high level input voltage
EN_SW low level input voltage
0.4
V
RDIS
Discharge resistance
VSW_IN = 5 V, EN_SW = 0 V
100
Ω
THERMAL SHUTDOWN
TTRIP_BUCK
Thermal protection trip point
Rising temperature
160
°C
THYST_BUCK
Thermal protection hysteresis
20
°C
Power switch thermal protection trip point in
TTRIP_SW
Rising temperature
145
°C
current limit (TPS65281-1 only)
THYST_SW
Hysteresis
10
°C
Figure 3. Power Switches Test Circuit and Voltage Waveforms
Figure 4. Response Time to Short Circuit Waveform
Figure 5. Output Voltage vs Current Limit Threshold
Copyright © 2012, Texas Instruments Incorporated
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Product Folder Links: TPS65281 TPS65281-1



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