Datasheet LT3686A (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 37V/1.2A Step-Down Regulator in 3mm × 3mm DFN and MSE |
| Pages / Page | 30 / 5 — typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. … |
| File Format / Size | PDF / 522 Kb |
| Document Language | English |
typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. Switching Frequency vs. Soft-Start/Track vs Frequency
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LT3686A
typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. Switching Frequency vs Soft-Start/Track vs Frequency Switching Frequency vs RT Temperature (1MHz)
300 2.20 1200 RT = 15.4k 250 2.15 1000 200 2.10 800 (kΩ) 150 2.05 600 R T 100 FREQUENCY (MHz) 2.00 FREQUENCY (kHz) 400 50 1.95 200 0 1.90 0 0 0.5 1 1.5 2 2.5 –50 0 50 100 150 0 500 1000 1500 2000 2500 FREQUENCY (MHz) TEMPERATURE (°C) SS (mV) 3686A G09 3686A G10 3686A G11
Switch Current Limit vs Soft-Start/Track vs VFB EN/UVLO Pin Current Temperature
900 45 3.0 800 40 700 35 2.5 600 30 500 25 2.0 FB (mV) 400 20 EN/UVLO (µA) 300 15 CURRENT LIMIT (A) 1.5 200 10 100 5 0 0 1.0 0 200 400 600 800 1000 1200 0 10 20 30 40 50 –50 0 50 100 150 SS (mV) EN/UVLO (V) TEMPERATURE (°C) 3686A G12 3686A G13 3686A G14
3.3V 5V Current Limit vs Duty Cycle OUT Maximum VIN for Full OUT Maximum VIN for Full Frequency (2MHz) Frequency (2MHz)
3.0 25 35 MODE/SYNC > 0.8 2.5 MODE/SYNC > 0.8 30 20 SWITCH PEAK 25 2.0 MODE/SYNC < 0.4 MODE/SYNC < 0.4 15 20 1.5 DA VALLEY (V) (V) V IN V IN 10 15 CURRENT LIMIT (A) 1.0 10 5 0.5 VOUT = 3.3V VOUT = 5V L = 6.8µH 5 L = 10µH f = 2MHz f = 2MHz 0 0 0 0 25 50 75 100 0 500 1000 1500 0 500 1000 DUTY CYCLE (%) LOAD CURRENT (mA) LOAD CURRENT (mA) 3686A G15 3686A G16 3686A G17 3686afa 5 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. Switching Frequency vs Soft-Start/Track vs Frequency Switching Frequency vs RT Temperature (1MHz)
300 2.20 1200 RT = 15.4k 250 2.15 1000 200 2.10 800 (kΩ) 150 2.05 600 R T 100 FREQUENCY (MHz) 2.00 FREQUENCY (kHz) 400 50 1.95 200 0 1.90 0 0 0.5 1 1.5 2 2.5 –50 0 50 100 150 0 500 1000 1500 2000 2500 FREQUENCY (MHz) TEMPERATURE (°C) SS (mV) 3686A G09 3686A G10 3686A G11
Switch Current Limit vs Soft-Start/Track vs VFB EN/UVLO Pin Current Temperature
900 45 3.0 800 40 700 35 2.5 600 30 500 25 2.0 FB (mV) 400 20 EN/UVLO (µA) 300 15 CURRENT LIMIT (A) 1.5 200 10 100 5 0 0 1.0 0 200 400 600 800 1000 1200 0 10 20 30 40 50 –50 0 50 100 150 SS (mV) EN/UVLO (V) TEMPERATURE (°C) 3686A G12 3686A G13 3686A G14
3.3V 5V Current Limit vs Duty Cycle OUT Maximum VIN for Full OUT Maximum VIN for Full Frequency (2MHz) Frequency (2MHz)
3.0 25 35 MODE/SYNC > 0.8 2.5 MODE/SYNC > 0.8 30 20 SWITCH PEAK 25 2.0 MODE/SYNC < 0.4 MODE/SYNC < 0.4 15 20 1.5 DA VALLEY (V) (V) V IN V IN 10 15 CURRENT LIMIT (A) 1.0 10 5 0.5 VOUT = 3.3V VOUT = 5V L = 6.8µH 5 L = 10µH f = 2MHz f = 2MHz 0 0 0 0 25 50 75 100 0 500 1000 1500 0 500 1000 DUTY CYCLE (%) LOAD CURRENT (mA) LOAD CURRENT (mA) 3686A G15 3686A G16 3686A G17 3686afa 5 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
