Datasheet LT8609S (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 42V, 2A/3A Peak Synchronous Step-Down Regulator with 2.5μA Quiescent Current |
| Pages / Page | 24 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Top FET Current Limit. vs Duty … |
| Revision | A |
| File Format / Size | PDF / 1.3 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Top FET Current Limit. vs Duty Cycle. vs Temperature. Switch Drop vs Temperature
Text Version of Document
LT8609S
TYPICAL PERFORMANCE CHARACTERISTICS Top FET Current Limit Top FET Current Limit vs Duty Cycle vs Temperature Switch Drop vs Temperature
5.50 5.0 350 SWITCH CURRENT = 1A 5.25 4.9 300 5.00 4.8 250 4.75 4.7 200 4.50 (A) 4.6 I SW 150 4.25 4.5 SWITCH DROP (mV) 4.00 100 TOP FET CURRENT LIMIT (A) 4.4 3.75 4.3 50 TOP SW BOT SW 3.50 4.2 0 0 20 40 60 80 100 –50 –10 30 70 110 150 –50 –30 –10 10 30 50 70 90 110 130 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 8609S G10 8609S G11 8609S G12
Minimum On-Time Minimum Off-Time Switch Drop vs Switch Current vs Temperature vs Temperature
800 70 150 VIN = 6V 700 140 60 ILOAD = 1A 130 600 50 120 500 40 110 400 100 30 300 90 SWITCH DROP (mV) 20 80 200 MINIMUM ON-TIME (ns) MINIMUM OFF–TIME (ns) 70 100 10 SYNC = 2V, 1.5A OUT 60 TOP SW BOT SW SYNC = 0V, 1.5A OUT 0 0 50 0 0.5 1 1.5 2 2.5 3 –50 –30 –10 10 30 50 70 90 110 130 150 –50 –30 –10 10 30 50 70 90 110 130 150 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 8609S G13 8609S G14 8609S G15
Switching Frequency Dropout Voltage vs Load Current vs Temperature
800 2.005 700 2.000 600 1.995 500 TAGE (mV) 400 1.990 300 1.985 DROPOUT VOL 200 SWITHCING FREQUENCY (MHz) 1.980 100 RT = 18.2kΩ 0 1.975 0 0.5 1 1.5 2 2.5 3 –50 –30 –10 10 30 50 70 90 110 130 150 LOAD CURRENT (A) TEMPERATURE (°C) 8609S G16 8609S G17 Rev. A 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 Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Top FET Current Limit Top FET Current Limit vs Duty Cycle vs Temperature Switch Drop vs Temperature
5.50 5.0 350 SWITCH CURRENT = 1A 5.25 4.9 300 5.00 4.8 250 4.75 4.7 200 4.50 (A) 4.6 I SW 150 4.25 4.5 SWITCH DROP (mV) 4.00 100 TOP FET CURRENT LIMIT (A) 4.4 3.75 4.3 50 TOP SW BOT SW 3.50 4.2 0 0 20 40 60 80 100 –50 –10 30 70 110 150 –50 –30 –10 10 30 50 70 90 110 130 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 8609S G10 8609S G11 8609S G12
Minimum On-Time Minimum Off-Time Switch Drop vs Switch Current vs Temperature vs Temperature
800 70 150 VIN = 6V 700 140 60 ILOAD = 1A 130 600 50 120 500 40 110 400 100 30 300 90 SWITCH DROP (mV) 20 80 200 MINIMUM ON-TIME (ns) MINIMUM OFF–TIME (ns) 70 100 10 SYNC = 2V, 1.5A OUT 60 TOP SW BOT SW SYNC = 0V, 1.5A OUT 0 0 50 0 0.5 1 1.5 2 2.5 3 –50 –30 –10 10 30 50 70 90 110 130 150 –50 –30 –10 10 30 50 70 90 110 130 150 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 8609S G13 8609S G14 8609S G15
Switching Frequency Dropout Voltage vs Load Current vs Temperature
800 2.005 700 2.000 600 1.995 500 TAGE (mV) 400 1.990 300 1.985 DROPOUT VOL 200 SWITHCING FREQUENCY (MHz) 1.980 100 RT = 18.2kΩ 0 1.975 0 0.5 1 1.5 2 2.5 3 –50 –30 –10 10 30 50 70 90 110 130 150 LOAD CURRENT (A) TEMPERATURE (°C) 8609S G16 8609S G17 Rev. A 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 Revision History Typical Application Related Parts
