Micrel MIC45208 Скачать руководство пользователя страница 9

Micrel, Inc. 

MIC45208 Evaluation Board 

 

 

August 19, 2015 

Revision 2.0 

 

 

MICREL, INC.   2180 FORTUNE DRIVE   SAN JOSE, CA  95131   USA 

TEL +1 (408) 944-0800  FAX +1 (408) 474-1000  WEB 

http://www.micrel.com

  

 

Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high-performance linear and power, LAN, and timing & communications 
markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock 
management, 

MEMs-based clock oscillators & crystal-less clock generators,

  Ethernet switches, and physical layer transceiver ICs.   Company 

customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products.   
Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and 
advanced technology design centers situated throughout the Americas, Europe, and Asia.  Additionally, the Company maintains an extensive network 
of distributors and reps worldwide. 
 
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This 
information is not intended as a warranty and Micrel does not assume responsibility for its use.  Micrel reserves the right to change circuitry, 
specifications and descriptions at any time without notice.   No license, whether express, implied, arising by estoppel or otherwise, to any intellectual 
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability 
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including  liability or warranties 
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. 
 
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product 
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical 
implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A 
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully 
indemnify Micrel for any damages resulting from such use or sale. 

 

© 2015 Micrel, Incorporated. 

Содержание MIC45208

Страница 1: ...current capability No external linear regulator is required to power the internal biasing of the IC because the MIC45208 has an internal PVDD LDO In applications where VIN 5 5V PVDD should be tied to...

Страница 2: ...e All other voltages not listed above can be set by modifying RBOTTOM value according to REF OUT REF BOTTOM V V V R1 R Eq 2 Note that the output voltage should not be set to exceed 5V Table 1 Typical...

Страница 3: ...up sequence including the soft start reduces the stress on the switching FETs and protects the load and supply for severe short conditions The short circuit current limit can be programmed by using th...

Страница 4: ...s on VIN VOUT and load conditions Figure 2 Switching Frequency Adjustment Equation 5 illustrates the estimated switching frequency 2 R 1 R 2 R f f O SW Eq 5 Where fO 600kHz R1 100k recommended R2 is s...

Страница 5: ...DK 10 F 50V 1206 X5R 10 MLCC 2 C2X C9 C10 C7 C7X C13 Open 6 C4 C8 C14 GRM188R71H104KA93D Murata 2 0 1 F 50V X7R 0603 10 MLCC 3 C5 C6 C3216X5R0J107M160AB TDK 100 F 6 3V X5R 1206 20 MLCC 2 C11 GRM1885C1...

Страница 6: ...e 8 06k 1 1 10W 0603 Thick Film 1 R7 CRCW06034K75FKEA Vishay Dale 4 75k 1 1 10W 0603 Thick Film 1 R8 CRCW06033K24FKEA Vishay Dale 3 24k 1 1 10W 0603 Thick Film 1 R9 CRCW06031K91FKEA Vishay Dale 1 91k...

Страница 7: ...Micrel Inc MIC45208 Evaluation Board August 19 2015 7 Revision 2 0 PCB Layout Recommendations MIC45208 Evaluation Board Top Layer MIC45208 Evaluation Board Copper Layer 2...

Страница 8: ...Micrel Inc MIC45208 Evaluation Board August 19 2015 8 Revision 2 0 PCB Layout Recommendations Continued MIC45208 Evaluation Board Copper Layer 3 MIC45208 Evaluation Board Bottom Layer...

Страница 9: ...intended as a warranty and Micrel does not assume responsibility for its use Micrel reserves the right to change circuitry specifications and descriptions at any time without notice No license whethe...

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