Datasheet LT3744 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | High Current Synchronous Step-Down LED Driver |
| 页数 / 页 | 32 / 6 — Typical perForMance characTerisTics. EN/UVLO Threshold (Falling). EN/UVLO … |
| 文件格式/大小 | PDF / 782 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics. EN/UVLO Threshold (Falling). EN/UVLO Hysteresis. EN/UVLO Pin Current. Quiescent Current
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文件文字版本
LT3744
Typical perForMance characTerisTics EN/UVLO Threshold (Falling) EN/UVLO Hysteresis EN/UVLO Pin Current
1.5 200 12 VEN/UVLO = 1.2V 1.45 10 1.4 160 1.35 8 1.3 120 1.25 6 1.2 80 4 1.15 EN/UVLO THRESHOLD (V) 1.1 EN/UVLO HYSTERESIS (mV) EN/UVLO PIN CURRENT (µA) V 40 IN = 3.3V VIN = 3.3V 2 1.05 VIN = 12V VIN = 12V VIN = 36V VIN = 36V 1.0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3744 G01 3744 G02 3744 G03
Quiescent Current IQ in Shutdown (Non-Switching) VREF
2.0 3.0 2.02 T = 150°C 1.8 T = 25°C T = –50°C 2.5 1.6 2.01 1.4 2.0 1.2 TAGE (V) 2.0 (µA) 1.0 (mA) 1.5 I Q I Q 0.8 PIN VOL 1.99 1.0 0.6 V REF 0.4 1.98 0.5 T = 125°C VIN = 3.3V 0.2 T = 25°C VIN = 12V T = –50°C VIN = 36V 0 0 1.97 0 6 12 18 24 30 36 0 4 8 12 16 20 24 28 32 36 –50 –25 0 25 50 75 100 125 VIN (V) VIN (V) TEMPERATURE (°C) 3744 G04 3744 G05 3744 G06
VREF UVLO VREF Current Limit Soft-Start Pin Current
1.8 6 6.0 5.8 1.7 5 5.6 1.6 5.4 4 5.2 (V) 1.5 3 5.0 V REF T PIN CURRENT (µA) 4.8 1.4 CURRENT LIMIT (mA) 2 AR 4.6 V REF T ST 4.4 1.3 VIN = 3.3V 1 T = 125°C SOF VIN = 3.3V VIN = 12V T = 25°C 4.2 VIN = 12V VIN = 36V T = –50°C VIN = 36V 1.2 0 4.0 –50 –25 0 25 50 75 100 125 3 6 9 12 15 18 21 24 27 30 33 36 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3744 G07 3744 G08 3744 G09 3744fa 6 For more information www.linear.com/LT3744 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 Typical Application Related Parts
Typical perForMance characTerisTics EN/UVLO Threshold (Falling) EN/UVLO Hysteresis EN/UVLO Pin Current
1.5 200 12 VEN/UVLO = 1.2V 1.45 10 1.4 160 1.35 8 1.3 120 1.25 6 1.2 80 4 1.15 EN/UVLO THRESHOLD (V) 1.1 EN/UVLO HYSTERESIS (mV) EN/UVLO PIN CURRENT (µA) V 40 IN = 3.3V VIN = 3.3V 2 1.05 VIN = 12V VIN = 12V VIN = 36V VIN = 36V 1.0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3744 G01 3744 G02 3744 G03
Quiescent Current IQ in Shutdown (Non-Switching) VREF
2.0 3.0 2.02 T = 150°C 1.8 T = 25°C T = –50°C 2.5 1.6 2.01 1.4 2.0 1.2 TAGE (V) 2.0 (µA) 1.0 (mA) 1.5 I Q I Q 0.8 PIN VOL 1.99 1.0 0.6 V REF 0.4 1.98 0.5 T = 125°C VIN = 3.3V 0.2 T = 25°C VIN = 12V T = –50°C VIN = 36V 0 0 1.97 0 6 12 18 24 30 36 0 4 8 12 16 20 24 28 32 36 –50 –25 0 25 50 75 100 125 VIN (V) VIN (V) TEMPERATURE (°C) 3744 G04 3744 G05 3744 G06
VREF UVLO VREF Current Limit Soft-Start Pin Current
1.8 6 6.0 5.8 1.7 5 5.6 1.6 5.4 4 5.2 (V) 1.5 3 5.0 V REF T PIN CURRENT (µA) 4.8 1.4 CURRENT LIMIT (mA) 2 AR 4.6 V REF T ST 4.4 1.3 VIN = 3.3V 1 T = 125°C SOF VIN = 3.3V VIN = 12V T = 25°C 4.2 VIN = 12V VIN = 36V T = –50°C VIN = 36V 1.2 0 4.0 –50 –25 0 25 50 75 100 125 3 6 9 12 15 18 21 24 27 30 33 36 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3744 G07 3744 G08 3744 G09 3744fa 6 For more information www.linear.com/LT3744 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 Typical Application Related Parts