ML4866CS MICRO-LINEAR [Micro Linear Corporation], ML4866CS Datasheet
ML4866CS
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ML4866CS Summary of contents
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Output DC–DC Step-Down Converter 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 ...
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ML4866 PIN CONFIGURATION PIN DESCRIPTION PIN NAME FUNCTION 1 V Regulated 3.3V output OUT 2 COMP Connection point for an external compensation network 3 V 1.25V reference output REF BURST 4 This pin controls when the control circuit switches between ...
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... Load Regulation Temperature Stability Total Variation SHUTDOWN UVLO Startup Threshold UVLO Shutdown Threshold SHDN Threshold SHDN Bias Current OPERATING CONDITIONS Temperature Range ML4866CS ................................................. 0ºC to 70ºC ML4866ES .............................................. -20ºC to 70ºC ML4866IS ............................................... -40ºC to 85ºC V Operating Range ................................... 3. 100µ 390k , C ...
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ML4866 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER SUPPLY I V Current IN IN Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions. FUNCTIONAL DESCRIPTION The ML4866 is a current-mode, step-down (buck) converter designed to keep ...
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DESIGN CONSIDERATIONS INDUCTOR SELECTION Figure 1 shows the inductor current in a step-down converter operating in CCM. Note that the inductor current does not reach zero during each switching cycle. This is unlike discontinuous conduction mode (DCM) where the inductor ...
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ML4866 DESIGN CONSIDERATIONS FREQUENCY COMPENSATION Frequency compensation of the ML4866 is required when the converter is operating in PWM mode. Two simple methods are provided to ensure the converter is frequency stable. Both these methods will work only if the ...
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LAYOUT For proper performance, all components should be placed as close to the ML4866 as possible. Particular attention should be paid to minimize the length of the connections between the COMP and V pins to GND. Also avoid REF bringing ...
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... PLACES) 0.055 - 0.061 (1.40 - 1.55) ORDERING INFORMATION PART NUMBER ML4866CS (End Of Life) ML4866ES (EOL) ML4866IS (Obsolete) © Micro Linear 1997 registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; ...