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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ML4866CS Datenblatt(PDF) 1 Page - Micro Linear Corporation |
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ML4866CS Datenblatt(HTML) 1 Page - Micro Linear Corporation |
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1 / 8 page  July 2000 ML4866* 3.3V Output DC–DC Step-Down Converter 1 GENERAL DESCRIPTION The ML4866 is a high efficiency pulse width modulated (PWM) buck regulator designed for use in 5V systems or portable equipment that need a compact, efficienct 3.3V supply. It has a switching frequency of 120kHz and uses synchronous rectification to optimize power conversion efficiency. Unlike other solutions, the ML4866 requires no external diodes or FETs. The ML4866 can provide up to 500mA of output current, and operates over an input voltage range of 3.5V to 6.5V (3 to 4 cells or a 5 VDC supply). A complete switched mode power converter can be quickly and easily implemented with few external components. Thanks to a built-in autoburst mode, power conversion efficiency of this DC–DC converter can exceed 90% over more than 2 decades of output load current. Stability and fast loop response are provided by current programming and a current sense circuit. The ML4866 also has a SHDN pin for use in systems which have power management control. Undervoltage lockout and soft start are also built in. BLOCK DIAGRAM FEATURES s High power conversion efficiency over 2 decades of load current s No external FETs or diodes; minimum external components s 3.5V to 6.5V input voltage range s Significantly extends battery life over linear regulator based solutions s Micropower operation s Low shutdown mode quiescent current VREF VIN 5 SHDN 6 VREF 3 BURST 4 COMP 2 GND 8 VOUT 1 VL 7 – + REFERENCE UVLO/ SHUTDOWN CURRENT SENSE – + ERROR AMPLIFIER BUCK CONTROL OSC SLOPE COMPENSATION BURST (* Indicates Part is End Of Life as of July 1, 2000) |
Ähnliche Teilenummer - ML4866CS |
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Ähnliche Beschreibung - ML4866CS |
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