SC1183 Semtech Corporation, SC1183 Datasheet
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SC1183
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SC1183 Summary of contents
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... The SC1182/3 linear sections are low dropout regula- tors. The SC1182 supplies 1.5V for GTL bus and 2.5V for non-GTL I/O. For the SC1183 both LDO’s are adjustable. PIN CONFIGURATION Top View AGND 1 24 ...
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... OVP source current Power good threshold voltage Dead time Linear Sections Quiescent current Output Voltage (LDO1 SC1182) Output Voltage (LDO2 SC1182) Reference Voltage (SC1183) Feedback Pin Bias Current (SC1183) Gain ( Load Regulation Line Regulation Output Impedance Notes: (1) See Output Voltage table. ...
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August 25, 1998 PIN DESCRIPTION Pin Pin Name Pin Function 1 AGND Small Signal Analog and Digital Ground 2 GATE1 Gate Drive Output LDO1 3 LDOS1 Sense Input for LDO1 4 LDOS2 Sense Input for LDO2 5 VCC Input Voltage ...
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August 25, 1998 OUTPUT VOLTAGE Unless specified 4.75V to 5.25V; GND = PGND = 0V PARAMETER CONDITIONS Output Voltage Application circuit O © 1998 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW ...
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August 25, 1998 APPLICATION CIRCUIT © 1998 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1182/3 5 ...
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August 25, 1998 MATERIALS LIST Qty. Reference Part/Description 4 C1,C5,C13, 0.1µF Ceramic C18 6 C2,C3,C14- 1500µF/6.3V C17 6 C9-C12, 330µF/6.3V C21, C22 1 L1 4µH 4 Q1,Q2,Q3, See notes 2.32k , 1%, 1/8W 1 ...
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August 25, 1998 95% 90% 85% 80% 3.5V Std 3.5V Sync 3.5V Sync Lo Rds 75% 70 (Amps) Typical Efficiency at Vo=3.5V 95% 90% 85% 80% 2.5V Std 2.5V Sync 2.5V Sync Lo Rds ...
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August 25, 1998 LAYOUT GUIDELINES Careful attention to layout requirements are necessary for successful implementation of the SC1182/3 PWM controller. High currents switching at 200kHz are pre- sent in the application and their effect on ground plane voltage differentials must ...
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August 25, 1998 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 cop- per ...
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August 25, 1998 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 requirements until ...
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August 25, 1998 FET type ( ( DS(on) BUK556H 22 2.48 IRL2203 7.0 0.79 Si4410 13.5 1.53 BOTTOM FET - Bottom FET losses are almost entirely due to conduction. The body diode is forced into con- ...
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August 25, 1998 OUTLINE DRAWING © 1998 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1182/3 JEDEC MS-013AD B17104B 12 ...