Datasheet LTC3376 (Analog Devices) - 10
| Hersteller | Analog Devices |
| Beschreibung | 20V, 4-Channel Buck DC/DC with 8x Configurable 1.5A Power Stages |
| Seiten / Seite | 28 / 10 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 6A … |
| Dateiformat / Größe | PDF / 1.7 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 6A Buck Efficiency vs ILOAD,
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LTC3376
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 6A Buck Efficiency vs ILOAD, 1.5A Buck Efficiency vs Frequency 1.5A Buck Efficiency vs Frequency 1.5A Buck Efficiency vs Frequency LOAD, 1.5A Buck Efficiency vs Frequency VOUT=3.3V (Forced Continuous Mode) (Forced Continuous Mode) OUT = 3.3V (Forced Continuous Mode)
100 100 100 90 95 95 80 90 90 L = 1.1µH 70 85 85 Burst Mode L DCR = 3.0mΩ ILOAD = 0.8A 60 OPERATION V f IN = 5V 80 80 I OSC = 2MHz V LOAD = 0.2A IN = 12V ILOAD = 0.05A 50 EXTVCC = 3.3V 75 75 V 40 IN = 5V 70 70 EFFICIENCY (%) VIN = 12V EFFICIENCY (%) EXTVCC = 3.3V EFFICIENCY (%) EXTVCC = 3.3V 30 VIN = 20V 65 65 V V IN = 5V VOUT = 3.3V IN = 12V 20 60 V 60 IN = 12V I V V LOAD = 0.5A OUT = 3.3V 10 IN = 20V 55 55 FORCED CONTINUOUS MODE L = 6.5µH L = 6.5µH 0 50 50 1m 10m 100m 1 6 1 1.5 2 2.5 3 1 1.5 2 2.5 3 LOAD CURRENT (A) FREQUENCY (MHz) FREQUENCY (MHz) 3376 G28 3376 G29 3376 G30
1.5A Buck Regulator Load 1.5A Buck Regulator Line 1.5A Buck Regulator Line Regulation (Forced Continuous Regulation (Forced Continuous Regulation (Forced Continuous Regulation (Forced Continuous 1.5 Buck Current Limit vs Duty 1.5A Buck Current Limit Mode) Mode) Cycle vs Duty Cycle
3.310 3.310 3.00 fOSC = 2MHz 3.308 2.90 L = 4.7µH 3.300 3.306 3.290 2.80 Due to minimum 3.304 2.70 3.280 off–time 3.302 2.60 (V) 3.270 (V) 3.300 2.50 V OUT 3.260 3.298 V OUT 2.40 3.250 3.296 f CURRENT LIMIT (A) 2.30 OSC = 2MHz 3.294 3.240 V V L = 4.7µH OUT = 3.3V 2.20 IN = 5V V I f IN = 12V 3.292 LOAD = 1mA 3.230 OSC = 2MHz 2.10 V I IN = 20V LOAD = 750mA L = 4.7µH 3.290 3.220 2.00 1m 10m 100m 1 2 4 6 8 10 12 14 16 18 20 20 26 32 38 44 50 56 62 68 74 80 LOAD CURRENT (A) VIN (V) DUTY CYCLE (%) 3376 G31 3376 G32 3376 G33 Rev 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 6A Buck Efficiency vs ILOAD, 1.5A Buck Efficiency vs Frequency 1.5A Buck Efficiency vs Frequency 1.5A Buck Efficiency vs Frequency LOAD, 1.5A Buck Efficiency vs Frequency VOUT=3.3V (Forced Continuous Mode) (Forced Continuous Mode) OUT = 3.3V (Forced Continuous Mode)
100 100 100 90 95 95 80 90 90 L = 1.1µH 70 85 85 Burst Mode L DCR = 3.0mΩ ILOAD = 0.8A 60 OPERATION V f IN = 5V 80 80 I OSC = 2MHz V LOAD = 0.2A IN = 12V ILOAD = 0.05A 50 EXTVCC = 3.3V 75 75 V 40 IN = 5V 70 70 EFFICIENCY (%) VIN = 12V EFFICIENCY (%) EXTVCC = 3.3V EFFICIENCY (%) EXTVCC = 3.3V 30 VIN = 20V 65 65 V V IN = 5V VOUT = 3.3V IN = 12V 20 60 V 60 IN = 12V I V V LOAD = 0.5A OUT = 3.3V 10 IN = 20V 55 55 FORCED CONTINUOUS MODE L = 6.5µH L = 6.5µH 0 50 50 1m 10m 100m 1 6 1 1.5 2 2.5 3 1 1.5 2 2.5 3 LOAD CURRENT (A) FREQUENCY (MHz) FREQUENCY (MHz) 3376 G28 3376 G29 3376 G30
1.5A Buck Regulator Load 1.5A Buck Regulator Line 1.5A Buck Regulator Line Regulation (Forced Continuous Regulation (Forced Continuous Regulation (Forced Continuous Regulation (Forced Continuous 1.5 Buck Current Limit vs Duty 1.5A Buck Current Limit Mode) Mode) Cycle vs Duty Cycle
3.310 3.310 3.00 fOSC = 2MHz 3.308 2.90 L = 4.7µH 3.300 3.306 3.290 2.80 Due to minimum 3.304 2.70 3.280 off–time 3.302 2.60 (V) 3.270 (V) 3.300 2.50 V OUT 3.260 3.298 V OUT 2.40 3.250 3.296 f CURRENT LIMIT (A) 2.30 OSC = 2MHz 3.294 3.240 V V L = 4.7µH OUT = 3.3V 2.20 IN = 5V V I f IN = 12V 3.292 LOAD = 1mA 3.230 OSC = 2MHz 2.10 V I IN = 20V LOAD = 750mA L = 4.7µH 3.290 3.220 2.00 1m 10m 100m 1 2 4 6 8 10 12 14 16 18 20 20 26 32 38 44 50 56 62 68 74 80 LOAD CURRENT (A) VIN (V) DUTY CYCLE (%) 3376 G31 3376 G32 3376 G33 Rev 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts