Datasheet LTC3851A-1 (Analog Devices) - 30
| Manufacturer | Analog Devices |
| Description | Synchronous Step-Down Switching Regulator Controller |
| Pages / Page | 30 / 30 — Typical applicaTion. 1.5V/15A Synchronized at 350kHz. relaTeD parTs. PART … |
| File Format / Size | PDF / 442 Kb |
| Document Language | English |
Typical applicaTion. 1.5V/15A Synchronized at 350kHz. relaTeD parTs. PART NUMBER. DESCRIPTION. COMMENTS
Model Line for this Datasheet
- LTC3851AEMSE-1#PBF LTC3851AEMSE-1#PBF LTC3851AEMSE-1#TRPBF LTC3851AEMSE-1#TRPBF LTC3851AEUD-1#PBF LTC3851AEUD-1#PBF LTC3851AEUD-1#TRPBF LTC3851AEUD-1#TRPBF LTC3851AHMSE-1#PBF LTC3851AHMSE-1#PBF LTC3851AHMSE-1#TRPBF LTC3851AHMSE-1#TRPBF LTC3851AIMSE-1#PBF LTC3851AIMSE-1#PBF LTC3851AIMSE-1#TRPBF LTC3851AIMSE-1#TRPBF LTC3851AIUD-1#PBF LTC3851AIUD-1#PBF LTC3851AIUD-1#TRPBF LTC3851AIUD-1#TRPBF LTC3851AMPMSE-1#PBF LTC3851AMPMSE-1#PBF LTC3851AMPMSE-1#TRPBF LTC3851AMPMSE-1#TRPBF
Text Version of Document
LTC3851A-1
Typical applicaTion 1.5V/15A Synchronized at 350kHz
VIN 6V TO 14V PLLIN MODE/PLLIN VIN C2 350kHz R5 + 0.01µF CIN 1k 180µF M1 FREQ/PLLFLTR TG RJK0305DPB C1 CB 1000pF 0.1µF RUN BOOST CSS L1 0.1µF LTC3851A-1 RSENSE 0.68µH 0.002Ω VOUT TK/SS SW 1.5V CC R D R2 15A C 1000pF CC2 B C10 7.5k 43.2k 100pF CMDSH-3 33pF 1% + C I OUT TH INTVCC 330µF R1 ×2 4.7µF 20k V M2 FB BG 1% RJK0301DPB SENSE– GND 1000pF C R OUT: SANYO 2R5TPE330M9 PG L1: SUMIDA CEP125-OR6MC SENSE+ PGOOD VPULL-UP R22 10Ω R20 10Ω 3851A1 TA03
relaTeD parTs PART NUMBER DESCRIPTION COMMENTS
LTC3854 Small Footprint Wide VIN Range Synchronous Step-Down Fixed 400kHz Operating Frequency, 4.5V≤ VIN ≤ 38V, DC/DC Controller 0.8V ≤ VOUT ≤ 5.25V, 2mm × 3mm QFN-12 LTC3878 No RSENSE™ Constant On-Time Synchronous Step-Down Very Fast Transient Response, tON(MIN) = 43ns, 4V≤ VIN ≤ 38V, DC/DC Controller 0.8V ≤ VOUT ≤ 0.9VIN, SSOP-16 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, MSOP-16E, 3mm × 3mm QFN-16 LTC3850/LTC3850-1 Dual 2-Phase, High Efficiency Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 250kHz to 780kHz, LTC3850-2 DC/DC Controllers, RSENSE or DCR Current Sensing and 4V≤ VIN ≤ 30V, 0.8V ≤ VOUT ≤ 5.25V Tracking LTC3853 Triple Output, Multiphase Synchronous Step-Down DC/DC Phase-Lockable Fixed Operating Frequency 250kHz to 750kHz, Controller, RSENSE or DCR Current Sensing and Tracking 4V≤ VIN ≤ 24V, VOUT Up to 13.5V LTC3834/LTC3834-1 Low IQ, Synchronous Step-Down DC/DC Controller Phase-Lockable Fixed Operating Frequency 140kHz to 650kHz, 4V≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 10V, IQ = 30µA, LT®3845A Low IQ , High Voltage Synchronous Step-Down DC/DC Adjustable Fixed Operating Frequency 100kHz to 500kHz, Controller 4V≤ VIN ≤ 60V, 1.23V ≤ VOUT ≤ 36V, IQ = 30µA, TSSOP-16 LTC3775 High Frequency Synchronous Voltage Mode Step-Down Synchronizable Fixed Frequency 250kHz to 1MHz, tON(MIN) = 30ns, DC/DC Controller 4V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 0.8VIN, MSOP-16E, 3mm × 3mm QFN-16 3851a1fa 30 Linear Technology Corporation LT 0511 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2010 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
Typical applicaTion 1.5V/15A Synchronized at 350kHz
VIN 6V TO 14V PLLIN MODE/PLLIN VIN C2 350kHz R5 + 0.01µF CIN 1k 180µF M1 FREQ/PLLFLTR TG RJK0305DPB C1 CB 1000pF 0.1µF RUN BOOST CSS L1 0.1µF LTC3851A-1 RSENSE 0.68µH 0.002Ω VOUT TK/SS SW 1.5V CC R D R2 15A C 1000pF CC2 B C10 7.5k 43.2k 100pF CMDSH-3 33pF 1% + C I OUT TH INTVCC 330µF R1 ×2 4.7µF 20k V M2 FB BG 1% RJK0301DPB SENSE– GND 1000pF C R OUT: SANYO 2R5TPE330M9 PG L1: SUMIDA CEP125-OR6MC SENSE+ PGOOD VPULL-UP R22 10Ω R20 10Ω 3851A1 TA03
relaTeD parTs PART NUMBER DESCRIPTION COMMENTS
LTC3854 Small Footprint Wide VIN Range Synchronous Step-Down Fixed 400kHz Operating Frequency, 4.5V≤ VIN ≤ 38V, DC/DC Controller 0.8V ≤ VOUT ≤ 5.25V, 2mm × 3mm QFN-12 LTC3878 No RSENSE™ Constant On-Time Synchronous Step-Down Very Fast Transient Response, tON(MIN) = 43ns, 4V≤ VIN ≤ 38V, DC/DC Controller 0.8V ≤ VOUT ≤ 0.9VIN, SSOP-16 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, MSOP-16E, 3mm × 3mm QFN-16 LTC3850/LTC3850-1 Dual 2-Phase, High Efficiency Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 250kHz to 780kHz, LTC3850-2 DC/DC Controllers, RSENSE or DCR Current Sensing and 4V≤ VIN ≤ 30V, 0.8V ≤ VOUT ≤ 5.25V Tracking LTC3853 Triple Output, Multiphase Synchronous Step-Down DC/DC Phase-Lockable Fixed Operating Frequency 250kHz to 750kHz, Controller, RSENSE or DCR Current Sensing and Tracking 4V≤ VIN ≤ 24V, VOUT Up to 13.5V LTC3834/LTC3834-1 Low IQ, Synchronous Step-Down DC/DC Controller Phase-Lockable Fixed Operating Frequency 140kHz to 650kHz, 4V≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 10V, IQ = 30µA, LT®3845A Low IQ , High Voltage Synchronous Step-Down DC/DC Adjustable Fixed Operating Frequency 100kHz to 500kHz, Controller 4V≤ VIN ≤ 60V, 1.23V ≤ VOUT ≤ 36V, IQ = 30µA, TSSOP-16 LTC3775 High Frequency Synchronous Voltage Mode Step-Down Synchronizable Fixed Frequency 250kHz to 1MHz, tON(MIN) = 30ns, DC/DC Controller 4V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 0.8VIN, MSOP-16E, 3mm × 3mm QFN-16 3851a1fa 30 Linear Technology Corporation LT 0511 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2010 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
