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MIC4690BM Datasheet(PDF) 8 Page - Micrel Semiconductor |
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MIC4690BM Datasheet(HTML) 8 Page - Micrel Semiconductor |
8 / 12 page MIC4690 Micrel MIC4690 8 June 2001 Applications Information Adjustable Regulators Adjustable regulators require a 1.23V feedback signal. Rec- ommended voltage-divider resistor values for common out- put voltages are included in Figure 1b. For other voltages, the resistor values can be determined using the following formulas: VV R1 R2 1 R1 R2 V V 1 V 1.23V OUT REF OUT REF REF =+ =− = SW L1 VIN FB GND SHDN C2 220µF 10V R1 3.01k R2 1.27k D1 2A 40V 5.0V/1A MIC4690BM C1 22µF 35V +6.8V to +30V SHUTDOWN ENABLE 5Ð8 4 3 2 1 Power SOP-8 18µH Figure 1a. Adjustable Regulator Circuit Bill of Material Matrix V OUT R1(1) R2(1) V IN C IN D1 L1 C OUT I OUT 5.0V 3.01k 976 Ω 6.8V-30V 22 µF, 35V 2A, 40V 18 µH 220 µF, 10V see SOA Vishay-Dale Schotty Sumida Vishay-Dale 595D226X0035D2T SS24 CDRH6D38-180ML 594D227X0010D2T Micro Commercial 5.0V 3.01k 976 Ω 6.8V-14V 47 µF, 20V 2A, 20V 18 µH 100 µF, 6.3V 1.0A Vishay-Dale Schotty Sumida Vishay-Dale 595D476X0020C2T SS22 CDRH6D38-180ML 595D107X06R3C2T Micro Commercial 3.3V 3.01k 1.78k 4.9V-14V 47 µF, 20V 2A, 20V 15 µH 120 µF, 4.0V 1.0A Vishay-Dale Schotty Sumida Vishay-Dale 595D476X0020C2T SS22 CDRH6D38-150ML 595D127X0004C2T Micro Commercial 2.5V 3.01k 2.94k 4.25V-14V 47 µF, 20V 2A, 20V 10 µH 120 µF, 4.0V 1.0A Vishay-Dale Schotty Sumida Vishay-Dale 595D476X0020C2T SS22 CDRH6D38-100ML 595D127X0004C2T Micro Commercial 1.8V 3.01k 6.49k 4.0V-14V 47 µF, 20V 2A, 20V 10 µH 120 µF, 4.0V 1.0A Vishay-Dale Schotty Sumida Vishay-Dale 595D476X0020C2T SS22 CDRH6D38-100ML 595D127X0004C2T Micro Commercial Note 1. All resistors 1% Figure 1b. Recommended Components for Common Ouput Voltages |
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