Datasheet LTC3878 (Analog Devices) - 26
| Manufacturer | Analog Devices |
| Description | Fast, Wide Operating Range No RSENSE Step-Down DC/DC Controller |
| Pages / Page | 26 / 26 — 4.5V to 14V Input, 0.9V/25A Output at 300kHz. PART NUMBER. DESCRIPTION. … |
| File Format / Size | PDF / 413 Kb |
| Document Language | English |
4.5V to 14V Input, 0.9V/25A Output at 300kHz. PART NUMBER. DESCRIPTION. COMMENTS
Model Line for this Datasheet
Text Version of Document
LTC3878 Typical applicaTion
4.5V to 14V Input, 0.9V/25A Output at 300kHz
VIN CSS D 4.5V TO 14V B CIN1 0.1µF + CMDSH-3 10µF CIN2 1 16 180µF RUN/SS BOOST 16V R1 R2 R s4 16V PG LTC3878 CB 10.0k 93.1k 100k 0.22µF 2 15 M1 PGOOD TG SiR408DP L1 0.26µH V 3 14 OUT VRNG SW 0.9V 4 13 25A FCB PGND CC1 680pF RC C M2 OUT1 7.5k 5 12 + COUT2 330µF 100µF ITH BG SiR892DP CVCC C 2.5V 6.3V C2 s2 4.7µF 100pF s3 s2 6 11 SGND INTVCC R 7 10 FB1 I 20.0k ON VIN 8 9 C R V F F C FB NC 0.1µF IN1: TDK C3225X5R1E106MT s4 2.2Ω COUT1: SANYO 2R5TPE330M9 s3 RFB2 RON COUT2: MURATA GRM31CR60J107ME39 s2 2.49k 432k L1: PULSE PA0513.261NLT 3878 TA08 relaTeD parTs
PART NUMBER DESCRIPTION COMMENTS
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 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 LTC3851A No RSENSE Wide VIN Range Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 250kHz to 750kHz, LTC3851A-1 DC/DC Controller 4V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 5.25V, MSOP-16E, 3mm × 3mm QFN-16, SSOP-16 LTC3775 High Frequency Synchronous Step-Down DC/DC Controller Fixed Operating Frequency 250kHz to 1MHz, 4.5V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 0.8VIN, 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 LTC3857/LTC3857-1 Low IQ, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz, DC/DC Controller with 99% Duty Cycle 4V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA, LTC3868/LTC3868-1 Low IQ, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz, DC/DC Controller with 99% Duty Cycle 4V≤ VIN ≤ 24V, 0.8V ≤ VOUT ≤ 14V, IQ = 170µA, 3878fa Linear Technology Corporation LT 0710 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 2009 Document Outline Features Description Applications 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
4.5V to 14V Input, 0.9V/25A Output at 300kHz
VIN CSS D 4.5V TO 14V B CIN1 0.1µF + CMDSH-3 10µF CIN2 1 16 180µF RUN/SS BOOST 16V R1 R2 R s4 16V PG LTC3878 CB 10.0k 93.1k 100k 0.22µF 2 15 M1 PGOOD TG SiR408DP L1 0.26µH V 3 14 OUT VRNG SW 0.9V 4 13 25A FCB PGND CC1 680pF RC C M2 OUT1 7.5k 5 12 + COUT2 330µF 100µF ITH BG SiR892DP CVCC C 2.5V 6.3V C2 s2 4.7µF 100pF s3 s2 6 11 SGND INTVCC R 7 10 FB1 I 20.0k ON VIN 8 9 C R V F F C FB NC 0.1µF IN1: TDK C3225X5R1E106MT s4 2.2Ω COUT1: SANYO 2R5TPE330M9 s3 RFB2 RON COUT2: MURATA GRM31CR60J107ME39 s2 2.49k 432k L1: PULSE PA0513.261NLT 3878 TA08 relaTeD parTs
PART NUMBER DESCRIPTION COMMENTS
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 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 LTC3851A No RSENSE Wide VIN Range Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 250kHz to 750kHz, LTC3851A-1 DC/DC Controller 4V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 5.25V, MSOP-16E, 3mm × 3mm QFN-16, SSOP-16 LTC3775 High Frequency Synchronous Step-Down DC/DC Controller Fixed Operating Frequency 250kHz to 1MHz, 4.5V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 0.8VIN, 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 LTC3857/LTC3857-1 Low IQ, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz, DC/DC Controller with 99% Duty Cycle 4V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA, LTC3868/LTC3868-1 Low IQ, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz, DC/DC Controller with 99% Duty Cycle 4V≤ VIN ≤ 24V, 0.8V ≤ VOUT ≤ 14V, IQ = 170µA, 3878fa Linear Technology Corporation LT 0710 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 2009 Document Outline Features Description Applications 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
