Datasheet LT1777 (Analog Devices) - 5

LT1777
W U TYPICAL PERFOR A CE CHARACTERISTICS Switching Frequency Minimum Synchronization vs Temperature Voltage vs Temperature
106 2.25 104 2.00 102 1.75 100 1.50 98 1.25 SWITCHING FREQUENCY (kHz) 96 1.00 MINIMUM SYNCHRONIZATION VOLTAGE (V) 94 0.75 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1777 G07 1777 G08
Output dI/dt Sense Voltage VC Pin Switching Threshold, vs Temperature Clamp Voltage vs Temperature
2.0 2.2 1.8 2.0 1.6 1.8 CLAMP 1.4 1.6 VOLTAGE 1.2 1.4 PIN VOLTAGE (V) C 1.0 V 1.2 SWITCHING dI/dt SENSE VOLTAGE (V) THRESHOLD 0.8 1.0 0.6 0.8 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1777 G09 1777 G10
Feedback Amplifier Output Error Amplifier Transconductance Current vs FB Pin Voltage vs Temperature
750 µA) 100 25°C 125°C 700 50 –55°C µmho) 650 0 600 550 –50 500 –100 TRANSCONDUCTANCE ( 450 FEEDBACK AMPLIFIER OUTPUT CURRENT ( –150 400 1.0 1.1 1.2 1.3 1.4 1.5 –50 –25 0 25 50 75 100 125 FB PIN VOLTAGE (V) TEMPERATURE (°C) 1777 G11 1777 G12 5