Datasheet LT8650S (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2µA Quiescent Current |
| Pages / Page | 32 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. No Load Supply Current with. Load … |
| Revision | A |
| File Format / Size | PDF / 1.4 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. No Load Supply Current with. Load Regulation. Line Regulation. Internal Compensation
Model Line for this Datasheet
LT8650S
Text Version of Document
LT8650S
TYPICAL PERFORMANCE CHARACTERISTICS No Load Supply Current with Load Regulation Line Regulation Internal Compensation
0.40 0.4 20 VIN1 = VIN2 = 12V VIN1 = VIN2 VIN1 = VIN2 0.30 VOUT1 = 5V, VOUT2 = 3.3V 0.3 IOUT = 0A 18 VOUT1 = 5V, VOUT2 = 3.3V FCM, fSW = 2MHz 16 IN REGULATION 0.20 0.2 SYNC = 0V, VBIAS = VOUT2 14 (%) 0.10 (%) 0.1 OUT OUT 12 0.00 0.0 10 –0.10 –0.1 8 CHANGE IN V CHANGE IN V 6 INPUT CURRENT (µA) –0.20 –0.2 4 –0.30 CH1 –0.3 2 BOTH CHANNELS ENABLED CH2 ONLY CHANNEL 2 ENABLED –0.40 –0.4 0 0 1 2 3 4 5 6 0 5 10 15 20 25 30 35 40 45 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8650S G08 8650S G09 8650S G10
No Load Supply Current with External Compensation No Load Supply Current Top FET Current Limit
160 160 16 VIN1 = VIN2 VIN1 = VIN2 = 12V 140 VOUT1 = 5V, VOUT2 = 3.3V 140 VOUT1 = 5V, VOUT2 = 3.3V IN REGULATION 14 VBIAS = VOUT1 120 SYNC = 0V 120 SYNC = 0V 12 100 100 10 80 80 8 60 60 INPUT CURRENT (µA) INPUT CURRENT (µA) CURRENT LIMIT (A) 6 40 40 20 20 4 0 0 2 5 10 15 20 25 30 35 40 –55 –25 5 35 65 95 125 155 0 0.2 0.4 0.6 0.8 1 INPUT VOLTAGE (V) TEMPERATURE (°C) DUTY CYCLE 8650S G11 8650S G12 8650S G13 BOTH CHANNELS ENABLED, BIAS = FLOAT BOTH CHANNELS IN REGULATION ONLY CHANNEL 2 ENABLED, BIAS = FLOAT INTERNAL COMP BOTH CHANNELS ENABLED, BIAS = VOUT2 EXTERNAL COMP ONLY CHANNEL 2 ENABLED, BIAS = VOUT2
Top FET Current Limit Bottom FET Current Limit Switch VDS
16 11 500 30% DC 10 450 14 9 400 12 8 350 10 7 (mV) 300 DS 6 250 8 5 200 CURRENT LIMIT (A) SWITCH V 6 CURRENT LIMIT (A) 4 150 3 100 4 2 50 TOP FET BOT FET 2 1 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) IDS (A) 8650S G14 8650S G15 8650S G16 Rev A For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics 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 No Load Supply Current with Load Regulation Line Regulation Internal Compensation
0.40 0.4 20 VIN1 = VIN2 = 12V VIN1 = VIN2 VIN1 = VIN2 0.30 VOUT1 = 5V, VOUT2 = 3.3V 0.3 IOUT = 0A 18 VOUT1 = 5V, VOUT2 = 3.3V FCM, fSW = 2MHz 16 IN REGULATION 0.20 0.2 SYNC = 0V, VBIAS = VOUT2 14 (%) 0.10 (%) 0.1 OUT OUT 12 0.00 0.0 10 –0.10 –0.1 8 CHANGE IN V CHANGE IN V 6 INPUT CURRENT (µA) –0.20 –0.2 4 –0.30 CH1 –0.3 2 BOTH CHANNELS ENABLED CH2 ONLY CHANNEL 2 ENABLED –0.40 –0.4 0 0 1 2 3 4 5 6 0 5 10 15 20 25 30 35 40 45 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8650S G08 8650S G09 8650S G10
No Load Supply Current with External Compensation No Load Supply Current Top FET Current Limit
160 160 16 VIN1 = VIN2 VIN1 = VIN2 = 12V 140 VOUT1 = 5V, VOUT2 = 3.3V 140 VOUT1 = 5V, VOUT2 = 3.3V IN REGULATION 14 VBIAS = VOUT1 120 SYNC = 0V 120 SYNC = 0V 12 100 100 10 80 80 8 60 60 INPUT CURRENT (µA) INPUT CURRENT (µA) CURRENT LIMIT (A) 6 40 40 20 20 4 0 0 2 5 10 15 20 25 30 35 40 –55 –25 5 35 65 95 125 155 0 0.2 0.4 0.6 0.8 1 INPUT VOLTAGE (V) TEMPERATURE (°C) DUTY CYCLE 8650S G11 8650S G12 8650S G13 BOTH CHANNELS ENABLED, BIAS = FLOAT BOTH CHANNELS IN REGULATION ONLY CHANNEL 2 ENABLED, BIAS = FLOAT INTERNAL COMP BOTH CHANNELS ENABLED, BIAS = VOUT2 EXTERNAL COMP ONLY CHANNEL 2 ENABLED, BIAS = VOUT2
Top FET Current Limit Bottom FET Current Limit Switch VDS
16 11 500 30% DC 10 450 14 9 400 12 8 350 10 7 (mV) 300 DS 6 250 8 5 200 CURRENT LIMIT (A) SWITCH V 6 CURRENT LIMIT (A) 4 150 3 100 4 2 50 TOP FET BOT FET 2 1 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) IDS (A) 8650S G14 8650S G15 8650S G16 Rev A For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
