Datasheet LT3845A (Analog Devices) - 26
| 制造商 | Analog Devices |
| 描述 | High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequency |
| 页数 / 页 | 26 / 26 — TYPICAL APPLICATION. 9V-16V to 3.3V at 5A DC/DC Converter, Frequency … |
| 文件格式/大小 | PDF / 295 Kb |
| 文件语言 | 英语 |
TYPICAL APPLICATION. 9V-16V to 3.3V at 5A DC/DC Converter, Frequency Synchronization Range 150kHz to 300kHz,
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LT3845A
TYPICAL APPLICATION 9V-16V to 3.3V at 5A DC/DC Converter, Frequency Synchronization Range 150kHz to 300kHz, Capable of Withstanding 60V Transients, All Ceramic Capacitors, Soft-Start and Burst Mode Enabled
VIN 9V TO 16V 60V TRANSIENTS CIN CIN2 C5 2.2µF 0.1µF 1µF 100V R3 100V 16V ×4 1.1M VIN BOOST C3 8200pF SHDN TG M1 L1 RSENSE Si7850DP 10µH 0.01Ω LT3845A VOUT CSS SW 3.3V D1 5A BURST_EN VCC B160 D2 BAS521 V M2 FB BG Si7850DP VC PGND COUT R1 100µF 10k SYNC SYNC SENSE+ 6.3V C4 R2 C1 ×4 R4 R5 fSET SENSE– 2.2µF 16.8k 100pF 10k 100k SGND 16V C2 R6 5600pF 130k 3845A TA04 CIN: TDK C4532X7R2A225K COUT: MURATA GRM32ER60J107ME20 L1: VISHAY IHLP-5050FD-01 M1, M2: VISHAY Si7850DP
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT3800 60V, Low IQ, Single Output Synchronous Step-Down Fixed 200kHz Operating Frequency DC/DC Controller 4V≤ VIN ≤ 60V, 1.23V ≤ VOUT ≤ 36V, IQ = 120µA, TSSOP-16 LTC3844 60V, Low IQ, Single Output Step-Down DC/DC Controller Synchronizable Fixed Frequency 50kHz to 600kHz, 4V ≤ VIN ≤ 60V, 1.23V ≤ VOUT ≤ 36V, IQ = 120µA, TSSOP-16 LT3724 60V, Low IQ, DC/DC Controller Multi Topology Fixed 200kHz Operating Frequency 4V ≤ VIN ≤ 60V, 1.23 ≤ VOUT ≤ 36V, IQ = 100µA, TSSOP-16 LT3741 High Power, Constant Current, Constant Voltage, Adjustable Fixed Frequency 200kHz to 1MHz Synchronous, Step Down Controller 6V ≤ VIN ≤ 36V, VOUT Up to (VIN –2) LTC3824 60V, Low IQ, Step-Down DC/DC Controller, Selectable Fixed Frequency 200kHz to 600kHz 100% Duty Cycle 4V≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ VIN, IQ = 40µA, MSOP-10E LTC3834/LTC3834-1 Low IQ, Single Output Synchronous Step-Down DC/DC Phase-Lockable Fixed Frequency 140kHz to 650kHz, LTC3835/LTC3835-1 Controller with 99% Duty Cycle 4V≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 10V, IQ = 30µA/80µA LTC3890 60V, Low IQ, Dual 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz DC/DC Controller 4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA LTC3857/LTC3857-1 Low IQ, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz, LTC3858/LTC3858-1 DC/DC Controllers with 99% Duty Cycle 4V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA/170µA LTC3859 Low IQ, Triple Output Buck/Buck/Boost Synchronous All Outputs Remain in Regulation Through Cold Crank DC/DC Controller 2.5V≤ VIN ≤ 38V, VOUT(BUCKS) Up to 24V, VOUT(BOOST) Up to 60V, IQ = 55µA 3845afa 26 Linear Technology Corporation LT 1110 • 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 Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL APPLICATION 9V-16V to 3.3V at 5A DC/DC Converter, Frequency Synchronization Range 150kHz to 300kHz, Capable of Withstanding 60V Transients, All Ceramic Capacitors, Soft-Start and Burst Mode Enabled
VIN 9V TO 16V 60V TRANSIENTS CIN CIN2 C5 2.2µF 0.1µF 1µF 100V R3 100V 16V ×4 1.1M VIN BOOST C3 8200pF SHDN TG M1 L1 RSENSE Si7850DP 10µH 0.01Ω LT3845A VOUT CSS SW 3.3V D1 5A BURST_EN VCC B160 D2 BAS521 V M2 FB BG Si7850DP VC PGND COUT R1 100µF 10k SYNC SYNC SENSE+ 6.3V C4 R2 C1 ×4 R4 R5 fSET SENSE– 2.2µF 16.8k 100pF 10k 100k SGND 16V C2 R6 5600pF 130k 3845A TA04 CIN: TDK C4532X7R2A225K COUT: MURATA GRM32ER60J107ME20 L1: VISHAY IHLP-5050FD-01 M1, M2: VISHAY Si7850DP
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT3800 60V, Low IQ, Single Output Synchronous Step-Down Fixed 200kHz Operating Frequency DC/DC Controller 4V≤ VIN ≤ 60V, 1.23V ≤ VOUT ≤ 36V, IQ = 120µA, TSSOP-16 LTC3844 60V, Low IQ, Single Output Step-Down DC/DC Controller Synchronizable Fixed Frequency 50kHz to 600kHz, 4V ≤ VIN ≤ 60V, 1.23V ≤ VOUT ≤ 36V, IQ = 120µA, TSSOP-16 LT3724 60V, Low IQ, DC/DC Controller Multi Topology Fixed 200kHz Operating Frequency 4V ≤ VIN ≤ 60V, 1.23 ≤ VOUT ≤ 36V, IQ = 100µA, TSSOP-16 LT3741 High Power, Constant Current, Constant Voltage, Adjustable Fixed Frequency 200kHz to 1MHz Synchronous, Step Down Controller 6V ≤ VIN ≤ 36V, VOUT Up to (VIN –2) LTC3824 60V, Low IQ, Step-Down DC/DC Controller, Selectable Fixed Frequency 200kHz to 600kHz 100% Duty Cycle 4V≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ VIN, IQ = 40µA, MSOP-10E LTC3834/LTC3834-1 Low IQ, Single Output Synchronous Step-Down DC/DC Phase-Lockable Fixed Frequency 140kHz to 650kHz, LTC3835/LTC3835-1 Controller with 99% Duty Cycle 4V≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 10V, IQ = 30µA/80µA LTC3890 60V, Low IQ, Dual 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz DC/DC Controller 4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA LTC3857/LTC3857-1 Low IQ, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz, LTC3858/LTC3858-1 DC/DC Controllers with 99% Duty Cycle 4V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA/170µA LTC3859 Low IQ, Triple Output Buck/Buck/Boost Synchronous All Outputs Remain in Regulation Through Cold Crank DC/DC Controller 2.5V≤ VIN ≤ 38V, VOUT(BUCKS) Up to 24V, VOUT(BOOST) Up to 60V, IQ = 55µA 3845afa 26 Linear Technology Corporation LT 1110 • 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 Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts