SC1186CSW Semtech Corporation, SC1186CSW Datasheet
SC1186CSW
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SC1186CSW Summary of contents
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... Reference available APPLICATIONS Pentium Flexible motherboards 1.3V to 3.5V microprocessor supplies Programmable triple power supplies ORDERING INFORMATION Part Number SC1186CSW Note: (1) Add suffix ‘TR’ for tape and reel. BLOCK DIAGRAM REF GATE2 LDOV VID4 VID0 VID3 ...
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PRELIMINARY - December 2, 1999 ABSOLUTE MAXIMUM RATINGS Parameter VCC to GND PGND to GND BST to GND Operating Temperature Range Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 seconds Thermal Impedance Junction to Ambient Thermal Impedance Junction ...
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PRELIMINARY - December 2, 1999 ELECTRICAL CHARACTERISTICS (Cont.) Unless specified 4.75V to 5.25V; GND = P CC PARAMETER LDOV Undervoltage Lockout LDOEN Threshold LDOEN Sink Current Overcurrent Trip Voltage Power-up Output Short Circuit Immunity Output Short Circuit Glitch ...
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PRELIMINARY - December 2, 1999 OUTPUT VOLTAGE Unless specified: 4.75V < VCC < 5.25V; GND = PGND = 0V; VOSENSE = V = 0°C < T < 85°C j PARAMETER VID 43210 Output Voltage 01111 01110 01101 01100 01011 01010 ...
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PRELIMINARY - December 2, 1999 APPLICATION CIRCUIT © 1999 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1186 5 ...
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... 2.32k , 1%, 1/ 1%, 1/ 5%, 1/ SC1186CSW © 1999 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER Vendor Notes Various SANYO MV-GX or equiv. Low ESR Various 8 Turns 16AWG on MICROMETALS T50-52D core See notes FET selection requires trade-off between efficiency and cost ...
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PRELIMINARY - December 2, 1999 96% 92% 88% 84% Vo=2.8V 80% Vo=2.0V Vo=2.5V 76% 0.0 2.0 4.0 6.0 8.0 10.0 Io (Amps) Typical Efficiency (Switching section) Transient Response Vo=2.4V, Io=300mA to 15A © 1999 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, ...
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PRELIMINARY - December 2, 1999 LAYOUT GUIDELINES Careful attention to layout requirements are necessary for successful implementation of the SC1186 PWM controller. High currents switching at 140kHz are pre- sent in the application and their effect on ground plane voltage ...
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PRELIMINARY - December 2, 1999 4) The Output Capacitor(s) (Cout) should be located as close to the load as possible, fast transient load currents are supplied by Cout only, and connections between Cout and the load must be short, wide ...
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PRELIMINARY - December 2, 1999 COMPONENT SELECTION SWITCHING SECTION OUTPUT CAPACITORS - Selection begins with the most critical component. Because of fast transient load current requirements in modern microprocessor core supplies, the output capacitors must supply all transient load current ...
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PRELIMINARY - December 2, 1999 Using 1.5X Room temp R to allow for temperature DS(ON) rise. FET type ( ( DS(on) IRL34025 15 1.69 IRL2203 10.5 1.19 Si4410 20 2.26 BOTTOM FET - Bottom FET losses ...
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PRELIMINARY - December 2, 1999 OUTLINE DRAWING ECN99-600 9-22-99 ECN99-719 12-2-99 © 1999 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1186 JEDEC MS-013AD B17104B 12 ...