Datasheet LT3980 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 58V, 2A, 2.4MHz Step-Down Switching Regulator with 85μA Quiescent Current |
| 页数 / 页 | 24 / 4 — Typical perFormance characTerisTics TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 334 Kb |
| 文件语言 | 英语 |
Typical perFormance characTerisTics TA = 25°C unless otherwise noted. Efficiency, VOUT = 3.3V. Efficiency, VOUT = 5V
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LT3980
Typical perFormance characTerisTics TA = 25°C unless otherwise noted. Efficiency, VOUT = 3.3V Efficiency, VOUT = 5V Efficiency vs Switching Frequency
90 95 88 4.0 VIN = 12V VIN = 12V 90 85 86 3.5 V 85 80 IN = 24V VIN = 24V 84 3.0 POWER LOSS (W) 80 V 75 V IN = 48V IN = 48V 82 2.5 75 70 80 2.0 70 EFFICIENCY (%) 65 EFFICIENCY (%) 78 1.5 65 EFFICIENCY (%) 60 60 76 1.0 VIN = 12V 55 f = 400kHz 55 f = 400kHz 74 V 0.5 OUT = 5V D = DIODES, INC. SBR3U100LP D = DIODES, INC. SBR3U100LP IOUT = 2A 50 50 72 0 0 0.5 1 1.5 2 0 0.5 1 1.5 2 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 I I LOAD (A) LOAD (A) SWITCHING FREQUENCY (MHz) 3980 G01 3980 G02 3980 G03
Maximum Load Current, No-Load Supply Current No-Load Supply Current VOUT = 3.3V
130 3.5 V 400 OUT = 3.3V CATCH DIODE: DIODES, INC. PDS360 TYPICAL 350 110 VIN = 12V 300 VOUT = 3.3V 90 INCREASED SUPPLY 3.0 250 CURRENT DUE TO CATCH DIODE LEAKAGE AT 70 200 HIGH TEMPERATURE MINIMUM 150 50 LOAD CURRENT (A) 2.5 SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 100 30 50 10 0 2.0 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 150 5 10 15 20 25 30 35 40 45 50 55 60 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3980 G06 3980 G04 3980 G05
Maximum Load Current, VOUT = 5V Switch Current Limit Switch Current Limit
3.5 5.0 6.5 6.0 4.5 TYPICAL 5.5 3.0 4.0 TYPICAL 5.0 4.5 3.5 MINIMUM DUTY CYCLE = 10% 4.0 MINIMUM 2.5 3.0 LOAD CURRENT (A) 3.5 SWITCH CURRENT LIMIT (A) SWITCH CURRENT LIMIT (A) 3.0 2.5 2.5 2.0 2.0 2.0 5 10 15 20 25 30 35 40 45 50 55 60 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) DUTY CYCLE (%) TEMPERATURE (°C) 3980 G07 3980 G09 3980 G08 3980fa 4 For more information www.linear.com/LT3980 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
Typical perFormance characTerisTics TA = 25°C unless otherwise noted. Efficiency, VOUT = 3.3V Efficiency, VOUT = 5V Efficiency vs Switching Frequency
90 95 88 4.0 VIN = 12V VIN = 12V 90 85 86 3.5 V 85 80 IN = 24V VIN = 24V 84 3.0 POWER LOSS (W) 80 V 75 V IN = 48V IN = 48V 82 2.5 75 70 80 2.0 70 EFFICIENCY (%) 65 EFFICIENCY (%) 78 1.5 65 EFFICIENCY (%) 60 60 76 1.0 VIN = 12V 55 f = 400kHz 55 f = 400kHz 74 V 0.5 OUT = 5V D = DIODES, INC. SBR3U100LP D = DIODES, INC. SBR3U100LP IOUT = 2A 50 50 72 0 0 0.5 1 1.5 2 0 0.5 1 1.5 2 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 I I LOAD (A) LOAD (A) SWITCHING FREQUENCY (MHz) 3980 G01 3980 G02 3980 G03
Maximum Load Current, No-Load Supply Current No-Load Supply Current VOUT = 3.3V
130 3.5 V 400 OUT = 3.3V CATCH DIODE: DIODES, INC. PDS360 TYPICAL 350 110 VIN = 12V 300 VOUT = 3.3V 90 INCREASED SUPPLY 3.0 250 CURRENT DUE TO CATCH DIODE LEAKAGE AT 70 200 HIGH TEMPERATURE MINIMUM 150 50 LOAD CURRENT (A) 2.5 SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 100 30 50 10 0 2.0 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 150 5 10 15 20 25 30 35 40 45 50 55 60 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3980 G06 3980 G04 3980 G05
Maximum Load Current, VOUT = 5V Switch Current Limit Switch Current Limit
3.5 5.0 6.5 6.0 4.5 TYPICAL 5.5 3.0 4.0 TYPICAL 5.0 4.5 3.5 MINIMUM DUTY CYCLE = 10% 4.0 MINIMUM 2.5 3.0 LOAD CURRENT (A) 3.5 SWITCH CURRENT LIMIT (A) SWITCH CURRENT LIMIT (A) 3.0 2.5 2.5 2.0 2.0 2.0 5 10 15 20 25 30 35 40 45 50 55 60 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) DUTY CYCLE (%) TEMPERATURE (°C) 3980 G07 3980 G09 3980 G08 3980fa 4 For more information www.linear.com/LT3980 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts