Datasheet LTC3809 (Analog Devices) - 24

LTC3809
TYPICAL APPLICATION Synchronous DC/DC Converter with Spread Spectrum Modulation
VIN 3.3V 300k CIN 2 9 SYNCH/MODE V 22μF IN 1000pF LTC3809EDD 1 8 MP PLLLPF TG Si3447BDV L 2200pF 100pF 6 1.5μH IPRG VOUT 10 SW 2.5V 15k 4 2A I 7 MN TH BG Si3460DV 187k 470pF 3 5 VFB RUN GND COUT 22μF 59k 11 3809 TA04 L: VISHAY IHLP-2525CZ-01
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTC1628/LTC3728 Dual High Effi ciency, 2-Phase Synchronous Constant Frequency, Standby, 5V and 3.3V LDOs, VIN to 36V, Step Down Controllers 28-Lead SSOP LTC1735 High Effi ciency Synchronous Step-Down Controller Burst Mode Operation, 16-Pin Narrow SSOP, Fault Protection, 3.5V ≤ VIN ≤ 36V LTC1778 No RSENSE, Synchronous Step-Down Controller Current Mode Operation Without Sense Resistor, Fast Transient Response, 4V ≤ VIN ≤ 36V LTC3411 1.25A (IOUT), 4MHz, Synchronous Step-Down DC/DC Converter 95% Effi ciency, VIN: 2.5V to 5.5V, VOUT ≥ 0.8V, IQ = 60μA, ISD = <1μA, MS Package LTC3412 2.5A (IOUT), 4MHz, Synchronous Step-Down DC/DC Converter 95% Effi ciency, VIN: 2.5V to 5.5V, VOUT ≥ 0.8V, IQ = 60μA, ISD = <1μA, TSSOP-16E Package LTC3416 4A, 4MHz, Monolithic Synchronous Step-Down Regulator Tracking Input to Provide Easy Supply Sequencing, 2.25V ≤ VIN ≤ 5.5V, 20-Lead TSSOP Package LTC3418 8A, 4MHz, Synchronous Step-Down Regulator Tracking Input to Provide Easy Supply Sequencing, 2.25V ≤ VIN ≤ 5.5V, QFN Package LTC3708 2-Phase, No RSENSE, Dual Synchronous Controller with Constant On-Time Dual Controller, VIN Up to 36V, Very Low Output Tracking Duty Cycle Operation, 5mm × 5mm QFN Package LTC3736/LTC3736-2 2-Phase, No RSENSE, Dual Synchronous Controller with 2.75V ≤ VIN ≤ 9.8V, 0.6V ≤ VOUT ≤ VIN, 4mm × 4mm QFN Output Tracking LTC3736-1 Low EMI 2-Phase, Dual Synchronous Controller with Integrated Spread Spectrum for 20dB Lower “Noise,” Output Tracking 2.75V ≤ VIN ≤ 9.8V LTC3737 2-Phase, No RSENSE, Dual DC/DC Controller with Output Tracking 2.75V ≤ VIN ≤ 9.8V, 0.6V ≤ VOUT ≤ VIN, 4mm × 4mm QFN LTC3772 Micropower No RSENSE Step-Down DC/DC Controller 2.75V ≤ VIN ≤ 9.8V, 3mm × 2mm DFN or 8-Lead SOT-23, 550kHz, IQ = 40μA, Current Mode LTC3776 Dual, 2-Phase, No RSENSE Synchronous Controller for Provides VDDQ and VTT with One IC, 2.75V ≤ VIN ≤ 9.8V, DDR/QDR Memory Termination Adjustable Constant Frequency with PLL Up to 850kHz, Spread Spectrum Operation, 4mm × 4mm QFN and 24-Lead SSOP Packages LTC3808 Low EMI, Synchronous Controller with Output Tracking 2.75V ≤ VIN ≤ 9.8V, 4mm × 3mm DFN, Spread Spectrum for 20dB Lower Peak Noise LTC3809-1 No RSENSE Synchronous Controller with Output Tracking 2.75V ≤ VIN ≤ 9.8V, 3mm × 3mm DFN and 10-Lead MSOPE Packages PolyPhase is a trademark of Linear Technology Corporation. 3809fc 24 Linear Technology Corporation LT 1108 REV C • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2005