Datasheet LTC3833 (Analog Devices) - 36

LTC3833
TYPICAL APPLICATION High Frequency 5.5V, 4A, 2MHz Step-Down Converter
RPGD INTV R CC VIN 100k 2.2Ω PGOOD V V IN IN C C
Efficiency
VIN IN2 MODE/PLLIN + C 7V TO 14V R IN1 DIV1 0.1µF 4.7µF 47µF 100k LTC3833 ×2 35V V 90 RNG EXTV PULSE- R CC DIV2 RUN V RF2 SKIPPING 26.1k OUT 10Ω 80 MODE SENSE– CSS 0.1µF CF RF1 70 1000pF 10Ω TRACK/SS SENSE+ 60 FORCED C MT ITH1 TG CONTINUOUS 220pF RITH L1 R 50 MODE 20k SW SENSE 1.2µH 10mΩ C V EFFICIENCY (%) ITH B 0.1µF OUT BOOST 5.5V 40 R 4A T DB CFF R 18.2k FB2 30 INTV V CC INTVCC 22pF 165k C IN = 12V RT OUT1 CVCC V 22µF OUT = 5.5V 4.7µF 20 SGND BG MB RFB1 ×2 0.1 1 10 20k PGND LOAD CURRENT (A) V + OSNS 3833 TA05b V – OSNS 3833 TA05 CIN1: KEMET T521X476M035ATE070 L1: WURTH 744313120 DB: DIODES, INC. SDM10K45 MT, MB: INFINEON BSC093N04LS
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTC3878/LTC3879 No RSENSE™ Constant On-Time Synchronous Step-Down Very Fast Transient Response, tON(MIN) = 43ns, 4V ≤ VIN ≤ 38V, DC/DC Controller 0.6V ≤ VOUT ≤ 0.9VIN, SSOP-16, MSOP-16E, 3mm × 3mm QFN-16 LTC3775 High Frequency Synchronous Voltage Mode Step-Down Very Fast Transient Response, tON(MIN) = 30ns, 4V ≤ VIN ≤ 38V, DC/DC Controller 0.6V ≤ VOUT ≤ 0.8VIN, MSOP-16E, 3mm × 3mm QFN-16 LTC3854 Small Footprint Synchronous Step-Down DC/DC Controller Fixed 400kHz Operating Frequency 4.5V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 5.25V, 2mm × 3mm QFN-12 LTC3851A/LTC3851A-1 No RSENSE Wide VIN Range Synchronous Step-Down Phase-Lockable Fixed Frequency 250kHz to 750kHz, 4V ≤ VIN ≤ 38V, DC/DC Controller 0.8V ≤ VOUT ≤ 5.25V, MSOP-16E, 3mm × 3mm QFN-16, SSOP-16 LTC3891 60V, Low IQ Synchronous Step-Down DC/DC Controller PLL Capable Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA LTC3856 2-Phase, Single Output Synchronous Step-Down Phase-Lockable Fixed 250kHz to 770kHz Frequency, DC/DC Controller with Diff Amp and DCR Temperature 4.5V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 5.25V Compensation LTC3829 3-Phase, Single Output Synchronous Step-Down Phase-Lockable Fixed 250kHz to 770kHz Frequency, DC/DC Controller with Diff Amp and DCR Temperature 4.5V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 5.25V Compensation LTC3855 2-Phase, Dual Output Synchronous Step-Down DC/DC Phase-Lockable Fixed Frequency 250kHz to 770kHz, Controller with Differential Remote Sense 4.5V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 12.5V LTC3850/LTC3850-1 2-Phase, Dual Output Synchronous Step-Down DC/DC Phase-Lockable Fixed Frequency 250kHz to 780kHz, 4V ≤ VIN ≤ 30V, Controllers, RSENSE or DCR Current Sensing 0.8V ≤ VOUT ≤ 5.25V, 4mm × 4mm QFN-28, 4mm × 5mm QFN-28, SSOP-28 LTC3853 Triple Output, Multiphase Synchronous Step-Down DC/DC Phase-Lockable Fixed Frequency 250kHz to 750kHz, 4V ≤ VIN ≤ 24V, Controller, RSENSE or DCR Current Sensing VOUT Up to 13.5V 3833f 36 Linear Technology Corporation LT 1010 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2010