Datasheet LT3790 (Analog Devices) - 7

LT3790
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. OVLO Threshold vs Temperature Soft-Start Current vs Temperature Supply Current vs Input Voltage
3.3 16 4.0 3.2 14 CHARGING 3.5 3.1 12 3.0 RISING 3.0 10 2.5 2.9 FALLING (µA) 8 (mA) 2.0 I SS I Q 2.8 6 1.5 OVLO THRESHOLD (V) 2.7 4 1.0 TA = 150°C 2.6 2 DISCHARGING 0.5 TA = 25°C TA = –50°C 2.5 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 10 20 30 40 50 60 TEMPERATURE (°C) TEMPERATURE (°C) VIN (V) 3790 G20 3790 G21 3790 G22
Oscillator Frequency EN/UVLO Pin Current EN/UVLO Threshold Voltage vs Temperature
8 1.30 800 VEN/UVLO = 1V 7 1.28 700 1.26 RT = 29.1k 6 600 1.24 5 1.22 500 RISING RT = 59.0k 4 1.20 400 3 1.18 FALLING 300 1.16 RT = 147k EN/UVLO PIN CURRENT (µA) 2 EN/UVLO THRESHOLD (V) 200 1.14 SWITCHING FREQUENCY (kHz) 1 1.12 100 0 1.10 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) 3790 G23 3790 G24 3790 G25
TG1, TG2 Minimum On-Time TG1, TG2 Minimum Off-Time V(BST1-SW1), V(BST2-SW2) UVLO vs Temperature vs Temperature vs Temperature
100 350 3.9 TG2 90 300 f 3.8 SW = 200kHz RISING 80 TG1 (V) 3.7 250 fSW = 400kHz 70 3.6 200 (BST2-SW2) 60 f , V 3.5 150 SW = 700kHz 50 3.4 100 FALLING 40 V (BST1-SW1) 3.3 TG1, TG2 MINIMUM ON-TIME (ns) 30 TG1, TG2 MINIMUM OFF-TIME (ns) 50 3.2 20 0 3.1 –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) 3790 G26 3790 G27 3790 G28 3790fa For more information www.linear.com/LT3790 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts