Datasheet LT8652S (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Dual Channel 8.5A, 18V, Synchronous Step-Down Silent Switcher with 16µA Quiescent Current |
| Pages / Page | 34 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. No … |
| File Format / Size | PDF / 2.9 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. No Load Supply Current with. External Compensation
Text Version of Document
LT8652S
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. No Load Supply Current with External Compensation No Load Supply Current Top FET Current Limit
260 500 32 240 BIAS = FLOAT VIN1 = VIN2 = 12V 450 V 30 220 BIAS = VOUT1 OUT1 = 3.3V, VOUT2 = 1.0V VBIAS = VOUT1 200 400 SYNC = 0V 28 180 350 BOTH CHANNELS IN REGULATION 26 160 300 24 140 250 22 120 100 200 20 80 INPUT CURRENT (µA) 150 EXTERNAL COMPENSATION INPUT CURRENT (µA) CURRENT LIMIT (A) 18 60 V INTERNAL COMPENSATION IN1 = VIN2 100 16 40 VOUT1 = 3.3V, VOUT2 = 1.0V 20 IN REGULATION 50 14 SYNC = 0V 0 0 12 6 8 10 12 14 16 18 –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 8652S G13 8652S G13 8652S G14
Top FET Current Limit Bottom FET Current Limit Switch Resistance
32 20 40 30% DC 30 19 36 28 18 32 26 17 28 24 16 24 ANCE (mΩ) 22 15 20 20 14 16 CURRENT LIMIT (A) 18 CURRENT LIMIT (A) 13 12 16 12 SWITCH RESIST 8 14 11 4 BOTTOM FET TOP FET 12 10 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8652S G16 8652S G17 LT8652 G18
Minimum On-Time Minimum Off-Time Dropout Voltage
60 76 1400 FCM, 4A LOAD FCM, 1A LOAD f 74 SW = 2MHz VOUT = 3.4V 50 1200 72 70 1000 40 FCM 68 TAGE (mV) 800 30 66 64 600 20 62 MINIMUM ON-TIME (ns) 400 MINIMUM OFF-TIME (ns) DROPOUT VOL BURST 60 10 200 58 0 56 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 1 2 3 4 5 6 7 8 9 10 11 12 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (A) 8652S G19 8652S G20 LT8652 G21 Rev. 0 6 For more information www.analog.com 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 TA = 25°C, unless otherwise noted. No Load Supply Current with External Compensation No Load Supply Current Top FET Current Limit
260 500 32 240 BIAS = FLOAT VIN1 = VIN2 = 12V 450 V 30 220 BIAS = VOUT1 OUT1 = 3.3V, VOUT2 = 1.0V VBIAS = VOUT1 200 400 SYNC = 0V 28 180 350 BOTH CHANNELS IN REGULATION 26 160 300 24 140 250 22 120 100 200 20 80 INPUT CURRENT (µA) 150 EXTERNAL COMPENSATION INPUT CURRENT (µA) CURRENT LIMIT (A) 18 60 V INTERNAL COMPENSATION IN1 = VIN2 100 16 40 VOUT1 = 3.3V, VOUT2 = 1.0V 20 IN REGULATION 50 14 SYNC = 0V 0 0 12 6 8 10 12 14 16 18 –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 8652S G13 8652S G13 8652S G14
Top FET Current Limit Bottom FET Current Limit Switch Resistance
32 20 40 30% DC 30 19 36 28 18 32 26 17 28 24 16 24 ANCE (mΩ) 22 15 20 20 14 16 CURRENT LIMIT (A) 18 CURRENT LIMIT (A) 13 12 16 12 SWITCH RESIST 8 14 11 4 BOTTOM FET TOP FET 12 10 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8652S G16 8652S G17 LT8652 G18
Minimum On-Time Minimum Off-Time Dropout Voltage
60 76 1400 FCM, 4A LOAD FCM, 1A LOAD f 74 SW = 2MHz VOUT = 3.4V 50 1200 72 70 1000 40 FCM 68 TAGE (mV) 800 30 66 64 600 20 62 MINIMUM ON-TIME (ns) 400 MINIMUM OFF-TIME (ns) DROPOUT VOL BURST 60 10 200 58 0 56 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 1 2 3 4 5 6 7 8 9 10 11 12 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (A) 8652S G19 8652S G20 LT8652 G21 Rev. 0 6 For more information www.analog.com 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
