Electronic Components Datasheet Search |
|
LT1584CT-3.3 Datasheet(PDF) 11 Page - Linear Technology |
|
LT1584CT-3.3 Datasheet(HTML) 11 Page - Linear Technology |
11 / 12 page 11 LT1584/LT1585/LT1587 APPLICATIONS INFORMATION This is the lowest resistance path for heat flow. Proper mounting ensures the best thermal flow from this area of the package to the heat sink. Linear Technology strongly recommends thermal compound at the case-to-heat sink interface. Use a thermally conductive spacer if the case of the device must be electrically isolated and include its contribution to the total thermal resistance. Please consult “Mounting Considerations for Power Semiconductors” 1990 Linear Applications Handbook, Volume I, Pages RR3-1 to RR3-20. The output connects to the case of all devices in the LT1584/LT1585/LT1587 series. For example, using an LT1585CT-3.3 (TO-220, commer- cial) and assuming: VIN(Max Continuous) = 5.25V (5V + 5%), VOUT = 3.3V, IOUT = 4.6A TA = 70°C, θHEAT SINK = 4°C/W θCASE-TO-HEAT SINK = 1°C/W (with Thermal Compound) Power dissipation under these conditions is equal to: PD = (VIN – VOUT)(IOUT) = (5.25 – 3.3)(4.6) = 9W Junction temperature will be equal to: TJ = TA + PD(θHEAT SINK + θCASE-TO-HEAT SINK + θJC) For the Control Section: TJ = 70°C + 9W (4°C/W + 1°C/W + 0.7°C/W) = 121.3°C 121.3 °C < 125°C = TJMAX (Control Section Commercial range) For the Power Transistor: TJ = 70°C + 9W (4°C/W + 1°C/W + 3°C/W) = 142°C 142 °C < 150°C = TJMAX (Power Transistor Commercial Range) In both cases the junction temperature is below the maxi- mum rating for the respective sections, ensuring reliable operation. TYPICAL APPLICATIONS N LT1587-3.45 GND IN PLACE AT MICROPROCESSOR SOCKET VCC PINS C1 10 µF 10V OUT VIN ≥ 4.75V + C2 22 µF 10V + C3 TO C6 47 µF 10V ESR OF THE 47 µF IS <0.1Ω LT1584 • TA03 + C7 TO C15 0.1 µF C16 TO C24 0.01 µF 3.45V 3A Recommended LT1587-3.45 Circuit for the Intel 486 TM DX4TM Overdrive Microprocessor Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LT1585 Transient Response for 3.8A Load Current Step* LT1584 • TA05 100 µs/DIV VOUT 50mV/DIV IOUT 2A/DIV Minimum Parts Count LT1585 Adjustable Circuit for the Intel Pentium VRE Processor 486 and DX4 are trademarks of Intel Corporation. * TRANSIENT RESPONSE MEASURED WITH AN INTEL POWER VALIDATOR. VOUT IS MEASURED AT THE POWER VALIDATOR LT1585CT ADJ IN AVX CORP. (803) 448-9411 THERMALLOY INC. (214) 243-4321 DO NOT SUBSTITUTE COMPONENTS. C1 TO C3 220 µF 10V AVX TPS 3 EACH R1 110 Ω 0.1% C4 330nF 16V AVX X7R 0805 OUT 4.75V TO 5.25V THERMALLOY 7020B-MT PLACE IN MICROPROCESSOR SOCKET CAVITY + C5 TO C10 100 µF 10V AVX TPS 4 EACH + C11 TO C20 1 µF 16V AVX Y5V 0805 24 EACH R2 197 Ω 0.1% 3.50V 4.6A 1584/5/7 TA04 |
Similar Part No. - LT1584CT-3.3 |
|
Similar Description - LT1584CT-3.3 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |