Datasheet LT8570, LT8570-1 (Analog Devices) - 4

LT8570/LT8570-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise specified Switch Current Limit vs Duty Cycle Switch Saturation Voltage Maximum Switch Current vs SS
1.00 700 1.0 LT8570, 1.5MHz LT8570 LT8570 LT8570, 200kHz LT8570-1 LT8570-1 600 0.8 0.75 500 TAGE (mV) 0.6 400 0.50 TION VOL 300 0.4 SWITCH CURRENT (A) SWITCH CURRENT (A) 0.25 TURA 200 SA 0.2 LT8570-1, 1.5MHz 100 LT8570-1, 200kHz 0 0 0.0 10 20 30 40 50 60 70 80 90 0 0.2 0.4 0.6 0.8 0 0.2 0.4 0.6 0.8 1 1.2 DUTY CYCLE (%) SWITCH CURRENT (A) SS VOLTAGE (V) 8570 G01 8570 G02 8570 G03
Switch Current Limit Positive and Negative Output vs Temperature Voltage Regulation
1.0 1.220 30 1.215 25 NEGATIVE FBX VOLTAGE (mV) 0.8 1.210 20 1.205 15 0.6 1.200 10 1.195 5 0.4 1.190 0 SWITCH CURRENT (A) 1.185 –5 0.2 POSITIVE FBX VOLTAGE (V) 1.180 –10 LT8570 1.175 –15 LT8570-1 0.0 1.170 –20 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 8570 G04 8570 G05
Positive and Negative FBX Current at Output Voltage Regulation Oscillator Frequency
86 86 NEGATIVE FBX CURRENT OUT OF PIN (µA) 1.8 1.6 RT = 56.2k 85 85 1.4 84 84 1.2 1.0 83 83 0.8 82 82 FREQUENCY (MHz) 0.6 0.4 81 81 RT = 422k POSITIVE FBX CURRENT INTO PIN (µA) 0.2 80 80 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 8570 G06 8570 G07 85701fa 4 For more information www.linear.com/LT8570 Document Outline Features Applications Typical Application Description 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