Datasheet LT8604 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | High Efficiency 42V/120mA Synchronous Buck |
| Seiten / Seite | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Top FET Current Limit. vs Duty … |
| Dateiformat / Größe | PDF / 2.8 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Top FET Current Limit. vs Duty Cycle. vs Temperature. Switch Drop vs Temperature
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LT8604
TYPICAL PERFORMANCE CHARACTERISTICS Top FET Current Limit Top FET Current Limit vs Duty Cycle vs Temperature Switch Drop vs Temperature
230 240 800 SWITCH CURRENT = 120mA 235 700 220 230 600 210 225 500 TOP SW 200 220 400 215 300 190 CURRENT LIMIT (mA) SWITCH DROP (mV) SWITCH CURRENT (mA) 210 200 180 BOT SW 205 100 170 200 0 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 8604 G09 8604 G10 8604 G11
Minimum On-Time Minimum Off-Time Switch Drop vs Switch Current vs Temperature vs Temperature
500 38 100 ILOAD = 100mA 36 95 400 34 32 90 300 30 TOP SW 28 85 200 26 SWITCH DROP (mV) 80 24 MINIMUM ON-TIME (ns) MINIMUM OFF-TIME (ns) 100 22 BOT SW 75 20 0 18 70 0 20 40 60 80 100 120 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 SWITCH CURRENT (mA) TEMPERATURE (°C) TEMPERATURE (°C) 8604 G12 8604 G13 8604 G14
Switching Frequency Dropout Voltage vs Load Current vs Temperature Burst Frequency vs Load Current
600 2030 2500 L = LPS5030-333MR RT = 18.2kΩ L = 33µH V 2250 OUT = 3.3V 2020 VIN = 12V 500 VOUT = 3.3V 2000 2010 1750 400 2000 1500 TAGE (mV) 300 1990 1250 1980 1000 200 750 DROPOUT VOL 1970 SWITCHING FREQUENCY (kHz) 500 100 SWITCHING FREQUENCY (kHz) 1960 250 0 1950 0 0 20 40 60 80 100 120 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 LOAD CURRENT (mA) TEMPERATURE (°C) LOAD CURRENT (mA) 8604 G15 8604 G16 8604 G17 Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Top FET Current Limit Top FET Current Limit vs Duty Cycle vs Temperature Switch Drop vs Temperature
230 240 800 SWITCH CURRENT = 120mA 235 700 220 230 600 210 225 500 TOP SW 200 220 400 215 300 190 CURRENT LIMIT (mA) SWITCH DROP (mV) SWITCH CURRENT (mA) 210 200 180 BOT SW 205 100 170 200 0 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 8604 G09 8604 G10 8604 G11
Minimum On-Time Minimum Off-Time Switch Drop vs Switch Current vs Temperature vs Temperature
500 38 100 ILOAD = 100mA 36 95 400 34 32 90 300 30 TOP SW 28 85 200 26 SWITCH DROP (mV) 80 24 MINIMUM ON-TIME (ns) MINIMUM OFF-TIME (ns) 100 22 BOT SW 75 20 0 18 70 0 20 40 60 80 100 120 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 SWITCH CURRENT (mA) TEMPERATURE (°C) TEMPERATURE (°C) 8604 G12 8604 G13 8604 G14
Switching Frequency Dropout Voltage vs Load Current vs Temperature Burst Frequency vs Load Current
600 2030 2500 L = LPS5030-333MR RT = 18.2kΩ L = 33µH V 2250 OUT = 3.3V 2020 VIN = 12V 500 VOUT = 3.3V 2000 2010 1750 400 2000 1500 TAGE (mV) 300 1990 1250 1980 1000 200 750 DROPOUT VOL 1970 SWITCHING FREQUENCY (kHz) 500 100 SWITCHING FREQUENCY (kHz) 1960 250 0 1950 0 0 20 40 60 80 100 120 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 LOAD CURRENT (mA) TEMPERATURE (°C) LOAD CURRENT (mA) 8604 G15 8604 G16 8604 G17 Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts