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TPS73718DCQ Datasheet(PDF) 3 Page - Texas Instruments

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Part # TPS73718DCQ
Description  1A Low-Dropout Regulator with Reverse Current Protection
Download  31 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS73718DCQ Datasheet(HTML) 3 Page - Texas Instruments

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TPS737xx
www.ti.com
SBVS067O – JANUARY 2006 – REVISED JUNE 2012
THERMAL INFORMATION
TPS737xx(2)
THERMAL METRIC(1)
DRB
DCQ
DRV(3)
UNITS
8 PINS
6 PINS
6 PINS
θJA
Junction-to-ambient thermal resistance(4)
49.5
53.1
67.2
θJCtop
Junction-to-case (top) thermal resistance(5)
58.9
35.2
87.6
θJB
Junction-to-board thermal resistance(6)
25.1
7.8
36.8
°C/W
ψJT
Junction-to-top characterization parameter(7)
1.7
2.9
1.8
ψJB
Junction-to-board characterization parameter(8)
25.2
7.7
37.2
θJCbot
Junction-to-case (bottom) thermal resistance(9)
8.6
N/A
7.7
(1)
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953A.
(2)
Thermal data for the DRB, DCQ, and DRV packages are derived by thermal simulations based on JEDEC-standard methodology as
specified in the JESD51 series. The following assumptions are used in the simulations:
(a)
i. DRB: The exposed pad is connected to the PCB ground layer through a 2x2 thermal via array.
. ii. DCQ: The exposed pad is connected to the PCB ground layer through a 3x2 thermal via array.
. iii. DRV: The exposed pad is connected to the PCB ground layer through a 2x2 thermal via array. Due to size limitation of thermal
pad, 0.8-mm pitch array is used which is off the JEDEC standard.
(b) The top copper layer has a detailed copper trace pattern. The bottom copper layer is assumed to have a 20% thermal conductivity of
copper, representing a 20% copper coverage.
(c) These data were generated with only a single device at the center of a JEDEC high-K (2s2p) board with 3in × 3in copper area. To
understand the effects of the copper area on thermal performance, see the Power Dissipation and Estimating Junction Temperature
sections of this data sheet.
(3)
Power dissipation may limit operating range.
(4)
The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as
specified in JESD51-7, in an environment described in JESD51-2a.
(5)
The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the top of the package. No specific JEDEC-
standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
(6)
The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB
temperature, as described in JESD51-8.
(7)
The junction-to-top characterization parameter,
ψJT, estimates the junction temperature of a device in a real system and is extracted
from the simulation data to obtain
θJA using a procedure described in JESD51-2a (sections 6 and 7).
(8)
The junction-to-board characterization parameter,
ψJB, estimates the junction temperature of a device in a real system and is extracted
from the simulation data to obtain
θJA using a procedure described in JESD51-2a (sections 6 and 7).
(9)
The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific
JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
Copyright © 2006–2012, Texas Instruments Incorporated
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