Datasheet LT3686 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 37V/1.2A Step-Down Regulator in 3mm × 3mm DFN |
| 页数 / 页 | 28 / 4 — typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 527 Kb |
| 文件语言 | 英语 |
typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. 3.3VOUT Efficiency (2MHz). 5VOUT Efficiency
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LT3686
typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. 3.3VOUT Efficiency (2MHz) 5VOUT Efficiency 3.3VOUT Maximum Load Current
90 90 2.0 80 80 MODE > 0.8V 1.8 TYPICAL MODE > 0.8V 70 70 1.6 60 60 1.4 MINIMUM 1.2 50 50 MODE < 0.4V MODE < 0.4V (A) 1.0 40 40 I OUT 0.8 EFFICIENCY (%) 30 EFFICIENCY (%) 30 0.6 20 VIN = 12V 20 VIN = 12V V 0.4 OUT = 3.3V VOUT = 5V VOUT = 3.3V 10 L = 6.8µH 10 L = 10µH 0.2 L = 6.8µH f = 2MHz f = 2MHz f = 2MHz 0 0 0 0 200 400 600 800 1000 1200 0 200 400 600 800 1000 1200 0 10 20 30 40 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 3686 G01 3686 G02 3686 G03
Internal Undervoltage Lockout 5VOUT Maximum Load Current Switch Voltage Drop (UVLO)
2.0 900 4.0 1.8 TYPICAL 800 1.6 700 3.5 1.4 MINIMUM 600 1.2 (A) 500 1.0 (mV) (V) 3.0 I OUT 400 V IN 0.8 V SW 300 0.6 150°C 2.5 0.4 200 VOUT = 5V 125°C 0.2 L = 10µH 100 25°C f = 2MHz –50°C 0 0 2.0 10 20 30 40 0 500 1000 1500 2000 2500 –50 0 50 100 150 VIN (V) ISW (mA) TEMPERATURE (°C) 3686 G04 3686 G05 3686 G06
Overvoltage Lockout (OVLO) VFB vs Temperature
40 820 39 810 38 (V) (mV) 800 V IN 37 V FB 790 36 35 780 –50 0 50 100 150 –50 0 50 100 150 TEMPERATURE (°C) TEMPERATURE (°C) 3686 G07 3686 G08 3686fc 4 Document Outline Features Applications Description 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 Related Parts
typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. 3.3VOUT Efficiency (2MHz) 5VOUT Efficiency 3.3VOUT Maximum Load Current
90 90 2.0 80 80 MODE > 0.8V 1.8 TYPICAL MODE > 0.8V 70 70 1.6 60 60 1.4 MINIMUM 1.2 50 50 MODE < 0.4V MODE < 0.4V (A) 1.0 40 40 I OUT 0.8 EFFICIENCY (%) 30 EFFICIENCY (%) 30 0.6 20 VIN = 12V 20 VIN = 12V V 0.4 OUT = 3.3V VOUT = 5V VOUT = 3.3V 10 L = 6.8µH 10 L = 10µH 0.2 L = 6.8µH f = 2MHz f = 2MHz f = 2MHz 0 0 0 0 200 400 600 800 1000 1200 0 200 400 600 800 1000 1200 0 10 20 30 40 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 3686 G01 3686 G02 3686 G03
Internal Undervoltage Lockout 5VOUT Maximum Load Current Switch Voltage Drop (UVLO)
2.0 900 4.0 1.8 TYPICAL 800 1.6 700 3.5 1.4 MINIMUM 600 1.2 (A) 500 1.0 (mV) (V) 3.0 I OUT 400 V IN 0.8 V SW 300 0.6 150°C 2.5 0.4 200 VOUT = 5V 125°C 0.2 L = 10µH 100 25°C f = 2MHz –50°C 0 0 2.0 10 20 30 40 0 500 1000 1500 2000 2500 –50 0 50 100 150 VIN (V) ISW (mA) TEMPERATURE (°C) 3686 G04 3686 G05 3686 G06
Overvoltage Lockout (OVLO) VFB vs Temperature
40 820 39 810 38 (V) (mV) 800 V IN 37 V FB 790 36 35 780 –50 0 50 100 150 –50 0 50 100 150 TEMPERATURE (°C) TEMPERATURE (°C) 3686 G07 3686 G08 3686fc 4 Document Outline Features Applications Description 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 Related Parts