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LTC1622CS8 数据表(PDF) 16 Page - Linear Technology |
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LTC1622CS8 数据表(HTML) 16 Page - Linear Technology |
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16 / 16 page  16 LTC1622 1622f LT/TP 0100 4K • PRINTED IN USA ©LINEAR TECHNOLOGY CORPORATION 1998 TYPICAL APPLICATION Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1147 Series High Efficiency Step-Down Switching Regulator Controllers 100% DC, 3.5V ≤ VIN ≤ 16V, HV Version Has 20VIN LT1375/LT1376 1.5A, 500kHz Step-Down Switching Regulators High Frequency, Small Inductor, High Efficiency LTC1436/LTC1436-PLL High Efficiency, Low Noise, Synchronous Step-Down Converters 24-Pin Narrow SSOP, 3.5V ≤ VIN ≤ 36V LTC1438/LTC1439 Dual, Low Noise, Synchronous Step-Down Converters Multiple Output Capability, 3.5V ≤ VIN ≤ 36V LTC1474/LTC1475 Low Quiescent Current Step-Down DC/DC Converters Monolithic, MSOP, IOUT = 10µA LTC1624 High Efficiency SO-8 N-Channel Switching Regulator Controller 8-Pin N-Channel Drive, 3.5V ≤ VIN ≤ 36V LTC1626 Low Voltage, High Efficiency Step-Down DC/DC Converter Monolithic, Constant Off-Time, 2.5V ≤ VIN ≤ 6V LTC1627/LTC1707 Low Voltage, Monolithic Synchronous Step-Down Regulator Low Supply Voltage Range: 2.65V to 8V, 0.5A LTC1628 Dual High Efficiency 2-Phase Step-Down Controller Antiphase Drive, 3.5V ≤ VIN ≤ 36V, Protection LTC1772 SOT-23 Current Mode Step-Down Controller 6-Lead SOT-23, 2.5V ≤ VIN ≤ 9.8V, 550kHz LTC1735 High Efficiency, Low Noise Synchronous Switching Controller Burst Mode Operation, Protection, 3.5V ≤ VIN ≤ 36V Small Footprint 3.3V/1A Regulator 1 2 3 4 8 7 6 5 SENSE– ITH VFB VIN PDRV GND SYNC/ MODE D1 RUN/ SS L1 2.2 µH R2 0.025 Ω M1 R3 232k VOUT 3.3V 1A R1 10k C3 220pF C1: MURATA CERAMIC GRM235Y5V106Z C2: SANYO POSCAP 6TPA47M D1: MOTOROLA MBRS120LT3 VIN 3.3V TO 8.5V R4 75k 1622 TA05 C4 560pF C1 10 µF 16V CERAMIC LTC1622 + C2 47 µF 6V + L1: COILCRAFT D01608C-222 M1: SILICONIX Si3443DY R2: DALE WSL-2010 0.025 Ω Efficiency vs Load Current LOAD CURRENT (mA) 1 100 90 80 70 60 50 10 100 1000 1622 TA05b VOUT = 3.3V RSENSE = 0.025Ω VIN = 3.5V VIN = 4.2V VIN = 6V Boost Converter 3.3V/2.5A Efficiency vs Load Current With LTC1622 Configured as Boost Converter D1 L1 4.6 µH R3 105k R2 0.015 Ω VIN 3.3V VOUT 5V 2.5A R4 20k 1622 TA06a C4 0.1 µF C5 150pF C1 100 µF 10V Si6801DQ M1 + C6 0.1 µF 1 2 3 4 8 7 6 5 SENSE– ITH VFB VIN PDRV GND RUN/ SS LTC1622 SYNC/ MODE R1 33k C3 470pF C1, C2: SANYO POSCAP TPB SERIES D1: MOTOROLA MBRD835L L1: SUMIDA CEP123-4R6 C2 220 µF 10V ×2 + M1: SILICONIX Si3442DV R2: DALE WS-L2512 0.015 Ω LOAD CURRENT (mA) 0.001 100 90 80 70 60 50 0.01 0.1 1 1622 TA06b VOUT = 5V RSENSE = 0.015Ω VIN = 3.3V |
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