Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

TC1262-XXVDB Folha de dados(PDF) 4 Page - Microchip Technology

Nome de Peças TC1262-XXVDB
Descrição Electrónicos  500mA Fixed Output CMOS LDO
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1262-XXVDB Folha de dados(HTML) 4 Page - Microchip Technology

  TC1262-XXVDB Datasheet HTML 1Page - Microchip Technology TC1262-XXVDB Datasheet HTML 2Page - Microchip Technology TC1262-XXVDB Datasheet HTML 3Page - Microchip Technology TC1262-XXVDB Datasheet HTML 4Page - Microchip Technology TC1262-XXVDB Datasheet HTML 5Page - Microchip Technology TC1262-XXVDB Datasheet HTML 6Page - Microchip Technology TC1262-XXVDB Datasheet HTML 7Page - Microchip Technology TC1262-XXVDB Datasheet HTML 8Page - Microchip Technology TC1262-XXVDB Datasheet HTML 9Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 12 page
background image
TC1262
DS21373B-page 4
© 2002 Microchip Technology Inc.
4.0
THERMAL CONSIDERATIONS
4.1
Thermal Shutdown
Integrated
thermal
protection
circuitry
shuts
the
regulator off when die temperature exceeds 160°C.
The regulator remains off until the die temperature
drops to approximately 150°C.
4.2
Power Dissipation
The amount of power the regulator dissipates is
primarily a function of input and output voltage, and
output current. The following equation is used to
calculate worst case actual power dissipation:
EQUATION 4-1:
The maximum allowable power dissipation (Equation
4-2) is a function of the maximum ambient temperature
(TAMAX), the maximum allowable die temperature
(TJ
MAX) and the thermal resistance from junction-to-air
(
θ
JA).
EQUATION 4-2:
Table 4-1 and Table 4-2 show various values of
θJA for
the TC1262 packages.
TABLE 4-1:
THERMAL RESISTANCE
GUIDELINES FOR TC1262 IN
SOT-223 PACKAGE
*Tab of device attached to topside copper
TABLE 4-2:
THERMAL RESISTANCE
GUIDELINES FOR TC1262 IN
3-PIN DDPAK/TO-220
PACKAGE
*Tab of device attached to topside copper
Equation 4-1 can be used in conjunction with Equation
4-2 to ensure regulator thermal operation is within
limits. For example:
Given:
VINMAX
= 3.3V ± 10%
VOUTMIN = 2.7V ± 0.5%
ILOADMAX = 275mA
TJMAX
= 125°C
TAMAX
=95°C
θJA
= 59°C/W (SOT-223)
Find: 1. Actual power dissipation
2. Maximum allowable dissipation
Actual power dissipation:
PD ≈ (VINMAX –VOUTMIN)ILOADMAX
= [(3.3 x 1.1) – (2.7 x .995)]275 x 10–3
= 260mW
Maximum allowable power dissipation:
In this example, the TC1262 dissipates a maximum of
260mW; below the allowable limit of 508mW. In a
similar manner, Equation 4-1 and Equation 4-2 can be
used to calculate maximum current and/or input
voltage limits. For example, the maximum allowable
VIN, is found by sustituting the maximum allowable
power dissipation of 508mW into Equation 4-1, from
which VINMAX =4.6V.
Copper
Area
(Topside)*
Copper
Area
(Backside)
Board
Area
Thermal
Resistance
JA)
2500 sq mm 2500 sq mm
2500 sq mm
45°C/W
1000 sq mm 2500 sq mm
2500 sq mm
45°C/W
225 sq mm
2500 sq mm
2500 sq mm
53°C/W
100 sq mm
2500 sq mm
2500 sq mm
59°C/W
1000 sq mm 1000 sq mm
1000 sq mm
52°C/W
1000 sq mm
0 sq mm
1000 sq mm
55°C/W
Where:
PD ≈ (VINMAX –VOUTMIN)ILOADMAX
PD
VINMAX
VOUTMIN
ILOADMAX
= Worst case actual power dissipation
= Minimum regulator output voltage
= Maximum output (load) current
= Maximum voltage on VIN
PDMAX =(TJMAX –TAMAX)
θJA
Where all terms are previously defined.
Copper
Area
(Topside)*
Copper
Area
(Backside)
Board
Area
Thermal
Resistance
JA)
2500 sq mm 2500 sq mm
2500 sq mm
25°C/W
1000 sq mm 2500 sq mm
2500 sq mm
27°C/W
125 sq mm
2500 sq mm
2500 sq mm
35°C/W
PDMAX =(TJMAX –TAMAX)
θJA
= (125 – 95)
59
= 508mW


Nº de peça semelhante - TC1262-XXVDB

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Microchip Technology
TC1262-xxVDB MICROCHIP-TC1262-xxVDB Datasheet
231Kb / 14P
   500mA Fixed Output CMOS LDO
2002-2012 11/27/12
TC1262-XXVDB MICROCHIP-TC1262-XXVDB Datasheet
451Kb / 12P
   500mA Fixed Output CMOS LDO
05/01/02
More results

Descrição semelhante - TC1262-XXVDB

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Microchip Technology
TC1262-3.3VDBTR MICROCHIP-TC1262-3.3VDBTR Datasheet
468Kb / 12P
   500mA Fixed Output CMOS LDO
05/01/02
TC1262-33VAB MICROCHIP-TC1262-33VAB Datasheet
451Kb / 12P
   500mA Fixed Output CMOS LDO
05/01/02
TC1262 MICROCHIP-TC1262_13 Datasheet
231Kb / 14P
   500mA Fixed Output CMOS LDO
2002-2012 11/27/12
TC1262 MICROCHIP-TC1262 Datasheet
461Kb / 12P
   500mA Fixed Output CMOS LDO
2002
TC1263 MICROCHIP-TC1263 Datasheet
486Kb / 14P
   500mA Fixed Output CMOS LDO with Shutdown
2002
TC1268 MICROCHIP-TC1268 Datasheet
448Kb / 12P
   500mA Fixed Output, Fast Response CMOS LDO with Shutdown
2002
logo
Rohm
BD00GA5WEFJ-E2 ROHM-BD00GA5WEFJ-E2 Datasheet
510Kb / 22P
   500mA Variable / Fixed Output LDO Regulators
BDXXGA5WEFJ ROHM-BDXXGA5WEFJ Datasheet
565Kb / 22P
   500mA Variable / Fixed Output LDO Regulators
7.Feb.2013 Rev.002
BD00HA5WEFJ ROHM-BD00HA5WEFJ_13 Datasheet
507Kb / 22P
   500mA Variable Fixed Output LDO Regulators
BD00IA5WEFJ ROHM-BD00IA5WEFJ Datasheet
479Kb / 22P
   500mA Variable Fixed Output LDO Regulators
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com