Electronic Components Datasheet Search |
|
CMPWR101 Datasheet(PDF) 6 Page - California Micro Devices Corp |
|
CMPWR101 Datasheet(HTML) 6 Page - California Micro Devices Corp |
6 / 6 page CALIFORNIA MICRO DEVICES ©2001 California Micro Devices Corp. All rights reserved. SmartOR™ is a trademark of California Micro Devices Corporation. 3/6/2001 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 6 CMPWR101 Typical Thermal Characteristics The overall junction to ambient thermal resistance ( θ JA) for device power dissipation (P D) consists primarily of two paths in series. The first path is the junction to the case ( θ JC) which is defined by the package style, and the second path is case to ambient ( θ CA) thermal resistance which is dependent on board layout. The final operating junction temperature for any set of conditions can be estimated by the following thermal equation: T JUNC = TAMB + PD (θJC ) + PD (θCA ) = T AMB + PD (θJA) The CMPWR101 uses a standard SOIC package. When this package is mounted on a double sided printed circuit board with two square inches of copper allocated for “heat spreading”, the resulting overall θ JA is 85°C/W. Based on maximum power dissipation of 0.43W (1.7V x 250mA) with an ambient of 70°C the resulting junction temperature will be: T JUNC = TAMB + PD (θJA ) = 70°C + 0.43W (80°C/W) = 70°C + 37°C = 103°C Thermal characteristics were measured using a double sided board with two square inches of copper area connected to the GND pins for “heat spreading”. Measurements showing performance up to junction temperature of 125°C were performed under light load conditions (5mA). This allows the ambient temperature to be representative of the internal junction temperature. Note: The use of multi-layer board construction with power planes will further enhance the thermal perfor- mance of the package. In the event of no copper area being dedicated for heat spreading, a multi-layer board construction, using only the minimum size pad layout, will typically provide the CMPWR101 with an overall θ JA of 100°C/W, which allows up to 0.5W to be safely dissipated. 3.284 3.286 3.288 3.290 3.292 3.294 3.296 3.298 3.300 20 30 40 50 60 70 Ambient Temperature (˚C) Figure 13. Regulator V OUT vs TAMB (250mA Load) 4.08 4.10 4.12 4.14 4.16 4.18 25 50 75 100 125 Junction Temperature (˚C) Figure 14. Deselect Threshold vs T JUNCT 0.20 0,22 0.24 0.26 0.28 0.30 0.32 0.34 0.36 20 30 40 50 60 70 Ambient Temperature ( ˚C) Figure 15. Switch Resistance vs AmbientTemperature |
Similar Part No. - CMPWR101 |
|
Similar Description - CMPWR101 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
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 |