 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LM2675M-3.3 Datasheet(PDF) 11 Page - Texas Instruments |
|
||||||||||||||||||||||||||||||
LM2675M-3.3 Datasheet(HTML) 11 Page - Texas Instruments |
|
|
11 / 30 page  LM2675 www.ti.com SNVS129E – MAY 2004 – REVISED JUNE 2005 LM2675 Series Buck Regulator Design Procedure (Fixed Output) PROCEDURE (Fixed Output Voltage Version) EXAMPLE (Fixed Output Voltage Version) To simplify the buck regulator design procedure, Texas Instruments is making available computer design software to be used with the SIMPLE SWITCHERline of switching regulators.LM267X Made Simpleversion 6.0 is available on Windows® 3.1, NT, or 95 operating systems. Given: Given: VOUT = Regulated Output Voltage (3.3V, 5V, or 12V) VOUT = 5V VIN(max) = Maximum DC Input Voltage VIN(max) = 12V ILOAD(max) = Maximum Load Current ILOAD(max) = 1A 1. Inductor Selection (L1) 1. Inductor Selection (L1) A. Select the correct inductor value selection guide from Figure 24, A. Use the inductor selection guide for the 5V version shown in Figure 25 or Figure 26 (output voltages of 3.3V, 5V, or 12V Figure 25. respectively). For all other voltages, see the design procedure for the adjustable version. B. From the inductor value selection guide, identify the inductance B. From the inductor value selection guide shown in Figure 25, the region intersected by the Maximum Input Voltage line and the inductance region intersected by the 12V horizontal line and the 1A Maximum Load Current line. Each region is identified by an vertical line is 33 μH, and the inductor code is L23. inductance value and an inductor code (LXX). C. Select an appropriate inductor from the four manufacturer's part C. The inductance value required is 33 μH. From the table in numbers listed in Inductor Value Selection Guides. Each Table 1, go to the L23 line and choose an inductor part number from manufacturer makes a different style of inductor to allow flexibility in any of the four manufacturers shown. (In most instances, both meeting various design requirements. Listed below are some of the through hole and surface mount inductors are available.) differentiating characteristics of each manufacturer's inductors: Schott: ferrite EP core inductors; these have very low leakage magnetic fields to reduce electro-magnetic interference (EMI) and are the lowest power loss inductors Renco: ferrite stick core inductors; benefits are typically lowest cost inductors and can withstand E•T and transient peak currents above rated value. Be aware that these inductors have an external magnetic field which may generate more EMI than other types of inductors. Pulse: powered iron toroid core inductors; these can also be low cost and can withstand larger than normal E•T and transient peak currents. Toroid inductors have low EMI. Coilcraft: ferrite drum core inductors; these are the smallest physical size inductors, available only as SMT components. Be aware that these inductors also generate EMI—but less than stick inductors. Complete specifications for these inductors are available from the respective manufacturers. A table listing the manufacturers' phone numbers is located in Table 2. 2. Output Capacitor Selection (COUT) 2. Output Capacitor Selection (COUT) A. Select an output capacitor from the output capacitor table in A. Use the 5.0V section in the output capacitor table in Table 3. Table 3. Using the output voltage and the inductance value found in Choose a capacitor value and voltage rating from the line that the inductor selection guide, step 1, locate the appropriate capacitor contains the inductance value of 33 μH. The capacitance and value and voltage rating. voltage rating values corresponding to the 33 μH inductor are the: The capacitor list contains through-hole electrolytic capacitors from Surface Mount: four different capacitor manufacturers and surface mount tantalum 68 μF/10V Sprague 594D Series. capacitors from two different capacitor manufacturers. It is 100 μF/10V AVX TPS Series. recommended that both the manufacturers and the manufacturer's Through Hole: series that are listed in the table be used. A table listing the 68 μF/10V Sanyo OS-CON SA Series. manufacturers' phone numbers is located in Table 2. 220 μF/35V Sanyo MV-GX Series. 220 μF/35V Nichicon PL Series. 220 μF/35V Panasonic HFQ Series. Copyright © 2004–2005, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM2675 |
Similar Part No. - LM2675M-3.3 |
|
Similar Description - LM2675M-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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
