Datasheet LT3791-1 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 60V 4-Switch Synchronous Buck-Boost Controller |
| Pages / Page | 26 / 7 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 312 Kb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. C/10 Threshold vs Temperature
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LT3791-1
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. C/10 Threshold vs Temperature OVLO Threshold vs Temperature Soft-Start Current vs Temperature
1.200 3.3 16 1.175 3.2 14 CHARGING RISING 1.150 3.1 12 RISING 1.125 3.0 10 FALLING 1.100 2.9 FALLING (µA) 8 I SS FB VOLTAGE (V) 1.075 2.8 6 OVLO THRESHOLD (V) 1.050 2.7 4 1.025 2.6 2 DISCHARGING 1.000 2.5 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 37911 G19 37911 G20 37911 G21
Supply Current vs Input Voltage EN/UVLO Pin Current EN/UVLO Threshold Voltage
4.0 8 1.30 VEN/ULO = 1V 3.5 7 1.28 1.26 3.0 6 1.24 2.5 5 1.22 RISING (mA) 2.0 4 1.20 I Q 1.5 3 1.18 FALLING 1.16 1.0 EN/UVLO PIN CURRENT (µA) 2 EN/UVLO THRESHOLD (V) T 1.14 A = 150°C 0.5 TA = 25°C 1 1.12 TA = –50°C 0 0 1.10 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 37911 G22 37911 G23 37911 G24
Oscillator Frequency TG1, TG2 Minimum On-Time TG1, TG2 Minimum Off-Time vs Temperature vs Temperature vs Temperature
800 100 350 TG2 700 90 R 300 T = 29.1k fSW = 200kHz 600 80 TG1 250 f 500 SW = 400kHz 70 RT = 59.0k 200 400 60 f 150 SW = 700kHz 300 50 RT = 147k 100 200 40 SWITCHING FREQUENCY (kHz) 100 TG1, TG2 MINIMUM ON-TIME (ns) 30 TG1, TG2 MINIMUM OFF-TIME (ns) 50 0 20 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 37911 G25 37911 G26 37911 G27 37911fb For more information www.linear.com/LT3791-1 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. C/10 Threshold vs Temperature OVLO Threshold vs Temperature Soft-Start Current vs Temperature
1.200 3.3 16 1.175 3.2 14 CHARGING RISING 1.150 3.1 12 RISING 1.125 3.0 10 FALLING 1.100 2.9 FALLING (µA) 8 I SS FB VOLTAGE (V) 1.075 2.8 6 OVLO THRESHOLD (V) 1.050 2.7 4 1.025 2.6 2 DISCHARGING 1.000 2.5 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 37911 G19 37911 G20 37911 G21
Supply Current vs Input Voltage EN/UVLO Pin Current EN/UVLO Threshold Voltage
4.0 8 1.30 VEN/ULO = 1V 3.5 7 1.28 1.26 3.0 6 1.24 2.5 5 1.22 RISING (mA) 2.0 4 1.20 I Q 1.5 3 1.18 FALLING 1.16 1.0 EN/UVLO PIN CURRENT (µA) 2 EN/UVLO THRESHOLD (V) T 1.14 A = 150°C 0.5 TA = 25°C 1 1.12 TA = –50°C 0 0 1.10 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 37911 G22 37911 G23 37911 G24
Oscillator Frequency TG1, TG2 Minimum On-Time TG1, TG2 Minimum Off-Time vs Temperature vs Temperature vs Temperature
800 100 350 TG2 700 90 R 300 T = 29.1k fSW = 200kHz 600 80 TG1 250 f 500 SW = 400kHz 70 RT = 59.0k 200 400 60 f 150 SW = 700kHz 300 50 RT = 147k 100 200 40 SWITCHING FREQUENCY (kHz) 100 TG1, TG2 MINIMUM ON-TIME (ns) 30 TG1, TG2 MINIMUM OFF-TIME (ns) 50 0 20 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 37911 G25 37911 G26 37911 G27 37911fb For more information www.linear.com/LT3791-1 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
