Datasheet LTC3772 (Analog Devices) - 20
| Hersteller | Analog Devices |
| Beschreibung | Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller |
| Seiten / Seite | 20 / 20 — TYPICAL APPLICATIO. Figure 5. 550kHz Micropower Step-Down DC/DC … |
| Dateiformat / Größe | PDF / 259 Kb |
| Dokumentensprache | Englisch |
TYPICAL APPLICATIO. Figure 5. 550kHz Micropower Step-Down DC/DC Converter. RELATED PARTS. PART NUMBER. DESCRIPTION. COMMENTS
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LTC3772
U TYPICAL APPLICATIO
680pF 20k V I IN TH/RUN VIN 3V TO 8V LTC3772 10µF GND PGATE FDC638P I 82.5k PRG L1 3.3µH VOUT VFB SW 2.5V 2A B220A 47µF 22pF 174k 3772 F05 L1: TOKO D53LCA915AT-3R3M
Figure 5. 550kHz Micropower Step-Down DC/DC Converter RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTC1624 High Efficiency SO-8 N-Channel Switching Regulator Controller N-Channel Drive, 3.5V ≤ VIN ≤ 36V LTC1625 No R TM SENSE Synchronous Step-Down Regulator 97% Efficiency, No Sense Resistor LT®1765 25V, 2.75A (IOUT), 1.25MHz Step-Down Converter 3V ≤ VIN ≤ 25V, VOUT ≥ 1.2V, SO-8 and TSSOP16 Packages LTC1771 Ultra-Low Supply Current Step-Down DC/DC Controller 10µA Supply Current, 93% Efficiency, 1.23V ≤ VOUT ≤ 18V; 2.8V ≤ VIN ≤ 20V LTC1772/LTC1772B 550kHz ThinSOT Step-Down DC/DC Controllers 2.5V ≤ VIN ≤ 9.8V, VOUT ≥ 0.8V, IOUT ≤ 6A LTC1778/LTC1778-1 No RSENSE Current Mode Synchronous Step-Down Controllers 4V ≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ (0.9)(VIN), IOUT Up to 20A LTC1872/LTC1872B 550kHz ThinSOT Step-Up DC/DC Controllers 2.5V ≤ VIN ≤ 9.8V; 90% Efficiency LTC3411/LTC3412 1.25/2.5A Monolithic Synchronous Step-Down Converter 95% Efficiency, 2.5V ≤ VIN ≤ 5.5V, VOUT ≥ 0.8V, TSSOP16 Exposed Pad Package LTC3440 600mA (IOUT), 2MHz Synchronous Buck-Boost DC/DC Converter 2.5V ≤ VIN ≤ 5.5V, Single Inductor LTC3736 Dual, 2-Phase, No RSENSE Synchronous Controller VIN: 2.75V to 9.8V, IOUT Up to 5A, 4mm × 4mm QFN with Output Tracking Package LTC3736-1 Dual, 2-Phase, No RSENSE Synchronous Controller VIN: 2.75V to 9.8V, Spread Spectrum Operation, Output with Spread Spectrum Voltage Tracking, 4mm × 4mm QFN Package LTC3737 Dual, 2-Phase, No RSENSE Controller with Output Tracking VIN: 2.75V to 9.8V, IOUT Up to 5A, 4mm × 4mm QFN Package LTC3776 Dual, 2-Phase, No RSENSE Synchronous Controller for Provides VDDQ and VTT with one IC, 2.75V ≤ VIN ≤ 9.8V, DDR/QDR Memory Termination Adjustable Constant Frequency with PLL Up to 850kHz, Spread Spectrum Operation, 4mm × 4mm QFN and 16-Lead SSOP Packages LTC3808 No RSENSE, Low EMI, Synchronous Step-Down Controller with 2.75V ≤ VIN ≤ 9.8V, Spread Spectrum Operation, Output Tracking 3mm × 4mm DFN and 16-Lead SSOP Packages 3772f LT/TP 0305 500 • PRINTED IN THE USA 20 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2005
U TYPICAL APPLICATIO
680pF 20k V I IN TH/RUN VIN 3V TO 8V LTC3772 10µF GND PGATE FDC638P I 82.5k PRG L1 3.3µH VOUT VFB SW 2.5V 2A B220A 47µF 22pF 174k 3772 F05 L1: TOKO D53LCA915AT-3R3M
Figure 5. 550kHz Micropower Step-Down DC/DC Converter RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTC1624 High Efficiency SO-8 N-Channel Switching Regulator Controller N-Channel Drive, 3.5V ≤ VIN ≤ 36V LTC1625 No R TM SENSE Synchronous Step-Down Regulator 97% Efficiency, No Sense Resistor LT®1765 25V, 2.75A (IOUT), 1.25MHz Step-Down Converter 3V ≤ VIN ≤ 25V, VOUT ≥ 1.2V, SO-8 and TSSOP16 Packages LTC1771 Ultra-Low Supply Current Step-Down DC/DC Controller 10µA Supply Current, 93% Efficiency, 1.23V ≤ VOUT ≤ 18V; 2.8V ≤ VIN ≤ 20V LTC1772/LTC1772B 550kHz ThinSOT Step-Down DC/DC Controllers 2.5V ≤ VIN ≤ 9.8V, VOUT ≥ 0.8V, IOUT ≤ 6A LTC1778/LTC1778-1 No RSENSE Current Mode Synchronous Step-Down Controllers 4V ≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ (0.9)(VIN), IOUT Up to 20A LTC1872/LTC1872B 550kHz ThinSOT Step-Up DC/DC Controllers 2.5V ≤ VIN ≤ 9.8V; 90% Efficiency LTC3411/LTC3412 1.25/2.5A Monolithic Synchronous Step-Down Converter 95% Efficiency, 2.5V ≤ VIN ≤ 5.5V, VOUT ≥ 0.8V, TSSOP16 Exposed Pad Package LTC3440 600mA (IOUT), 2MHz Synchronous Buck-Boost DC/DC Converter 2.5V ≤ VIN ≤ 5.5V, Single Inductor LTC3736 Dual, 2-Phase, No RSENSE Synchronous Controller VIN: 2.75V to 9.8V, IOUT Up to 5A, 4mm × 4mm QFN with Output Tracking Package LTC3736-1 Dual, 2-Phase, No RSENSE Synchronous Controller VIN: 2.75V to 9.8V, Spread Spectrum Operation, Output with Spread Spectrum Voltage Tracking, 4mm × 4mm QFN Package LTC3737 Dual, 2-Phase, No RSENSE Controller with Output Tracking VIN: 2.75V to 9.8V, IOUT Up to 5A, 4mm × 4mm QFN Package LTC3776 Dual, 2-Phase, No RSENSE Synchronous Controller for Provides VDDQ and VTT with one IC, 2.75V ≤ VIN ≤ 9.8V, DDR/QDR Memory Termination Adjustable Constant Frequency with PLL Up to 850kHz, Spread Spectrum Operation, 4mm × 4mm QFN and 16-Lead SSOP Packages LTC3808 No RSENSE, Low EMI, Synchronous Step-Down Controller with 2.75V ≤ VIN ≤ 9.8V, Spread Spectrum Operation, Output Tracking 3mm × 4mm DFN and 16-Lead SSOP Packages 3772f LT/TP 0305 500 • PRINTED IN THE USA 20 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2005