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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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MIC2124YMM bảng dữ liệu(PDF) 1 Page - Micrel Semiconductor |
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MIC2124YMM bảng dữ liệu(HTML) 1 Page - Micrel Semiconductor |
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1 / 24 page  MIC2124 Constant Frequency, Synchronous Current Mode Buck Controller Hyper Speed Control™ Family Hyper Speed Control and Any Capacitor are trademarks of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( 408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com June 2010 M9999-060810-D General Description The Micrel MIC2124 is a member of the Hyper Speed Contro™l family of DC-DC controllers. It uses an adaptive on-time current mode control scheme and operates at a constant frequency. The MIC2124 operates over a supply range of +3V to +18V, and is independent of the IC supply voltage VIN. It operates at a fixed 300kHz switching frequency and can be used to provide up to 25A of output current. The output voltage is adjustable down to +0.8V. The MIC2124 includes an EN/COMP pin that can be pulled low to shut down the converter. The MIC2124 optimizes performance and ensures stability with external compensation. The UVLO is provided to ensure proper operation under power-sag conditions and to make sure that the external power MOSFET has enough voltage to work with. An internal digital soft-start ensures reduced inrush current. Cycle-by-cycle current limiting ensures FET protection. The MIC2124 is available in a 10-pin MSOP package with a junction temperature operating range from –40ºC to +125ºC. Features • +3V to +18V input voltage • 25A output current capability • Any Capacitor TM stable - Zero ESR to high ESR • Output down to 0.8V with ±1% FB accuracy • Up to 94% efficiency • 300kHz switching frequency • All N-Channel MOSFET design • Shutdown feature with EN/COMP • No current-sense resistor needed • Internal 4ms digital soft-start • Thermal shutdown • Pre-bias output safe • Cycle-by-Cycle foldback current-limit protection • 10-pin MSOP package • –40ºC to +125ºC junction temperature range Applications • Printers and scanners • Graphic and video cards • PCs and servers • Microprocessor core supply • Low-voltage distributed power • Telecommunication and networking • Set-top box, gateways and router Typical Application MIC2124 Adjustable Output 300kHz Buck Converter 12V to 3.3V Efficiency 60 70 80 90 100 02 46 8 10 OUT PUT CURRENT (A) VHSD = 12V VIN = 5V |
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Mô tả tương tự - MIC2124YMM |
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