mic4574 Micrel Semiconductor, mic4574 Datasheet
mic4574
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mic4574 Summary of contents
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... MIC4574 General Description The MIC4574 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4574 duplicates the pinout and function of the 52kHz LM2574. The higher switching frequency may allow 2:1 reduction in output filter inductor size. ...
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... Pin Number Pin Name SGND 3 SHDN 4 PGND 5 VIN M9999-062105 Temperature Pb-Free Voltage MIC4574-3.3YN 3.3V –40°C to +85°C MIC4574-5.0YN 5.0V –40°C to +85°C MIC4574YN Adjustable –40°C to +85° SGND SHDN PGND ...
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... The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Note 4. Specification for packaged product only. Note 5. The MIC4574 is not guaranteed to survive a short circuit to ground for input voltage above 24V. June 2005 Operating Ratings (Note 1) Supply Voltage (V Package Thermal Resistance θ ...
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... MIC4574 Block Diagrams Shutdown Enable SHDN MIC4574-x.x Shutdown Enable SHDN MIC4574 M9999-062105 +24V max Internal Regulator Thermal Current Shutdown Limit 200kHz Oscillator Driver Com- parator 0.5A Switch 1.23V Bandgap Error Amp GND Block Diagram with External Components Fixed Step-Down Regulator +24V max ...
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... MIC4574 Functional Description The MIC4574 is a variable duty cycle switch-mode regulator with an internal power switch. Refer to the block diagrams. Supply Voltage The MIC4574 operates from a +4V to +24V unregulated input. Highest efficiency operation is from a supply voltage below +15V. Enable/Shutdown The shutdown ( ) input is TTL compatible. Ground the SHDN input if unused ...
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... UPL1J330MEH, ESR = 0.35Ω C2 Nichicon UPL1C221MPH, ESR = 0.16Ω D1 Motorola MBR160 L1 Sumida RCH106-221K, DCR = 0.78Ω Figure 3. 16V–24V to 12V/0.5A Buck Converter Through Hole SHDN SW 100µH MIC4574-5.0BN 8V to 24V SGND PGND D1 47µF 1N5819 2 4 35V C1 Nichicon UPL1J470MEH, ESR = 0.34Ω ...
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... MIC4574 Package Information 0.018 (0.57) MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...