Datasheet LT3690 (Analog Devices) - 7

LT3690
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. EN Threshold Voltage UVLO Threshold Voltage EN Pin Current vs VEN vs Temperature vs Temperature
10 2.5 2.5 8 2.0 2.0 TAGE (V) TAGE (V) 6 1.5 1.5 4 1.0 1.0 EN PIN CURRENT (µA) 2 EN THRESHOLD VOL 0.5 UVLO THRESHOLD VOL 0.5 0 0 0 0 5 10 15 20 25 30 35 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 EN PIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3690 G19 3690 G17 3690 G18
UVLO Pin Current vs Temperature Power Good Threshold (VUVLO = 1.33V) Feedback Voltage vs Temperature vs Temperature
–1.2 0.82 95 –1.4 –1.6 0.81 90 –1.8 TAGE (V) –2.0 0.80 85 –2.2 FB PIN VOL PG THRESHOLD (%) UVLO PIN CURRENT (µA) –2.4 0.79 80 –2.6 –2.8 0.78 75 –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) 3690 G21 3690 G22 3690 G20
Error Amp Output Current vs VFB VC Voltages vs Temperature Frequency Foldback vs VFB
60 2.5 800 RT = 32.4k CURRENT LIMIT CLAMP 700 40 2.0 600 20 1.5 500 TAGE (V) 0 400 1.0 300 PIN CURRENT (µA) –20 PIN VOL FREQUENCY (kHz) V C V C SWITCHING THRESHOLD 200 0.5 –40 100 –60 0 0 0.6 0.7 0.8 0.9 1.0 –50 –25 0 25 50 75 100 125 150 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 FB PIN VOLTAGE (V) TEMPERATURE (°C) FB PIN VOLTAGE (V) 3690 G24 3690 G23 3690 G25 3690fb For more information www.linear.com/LT3690 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts