Datasheet LT8610A, LT8610AB (Analog Devices) - 7

LT8610A/LT8610AB Series
TYPICAL PERFORMANCE CHARACTERISTICS Top FET Current Limit vs Duty Cycle Top FET Current Limit Bottom FET Current Limit
8.0 7.00 5.50 7.5 6.75 5.25 7.0 6.50 5.00 30% DC 6.5 6.25 4.75 6.0 6.00 4.50 5.5 5.75 4.25 5.0 5.50 4.00 CURRENT LIMIT (A) 4.5 CURRENT LIMIT (A) 5.25 CURRENT LIMIT (A) 3.75 4.0 5.00 3.50 3.5 4.75 3.25 3.0 4.50 3.00 0 0.2 0.4 0.6 0.8 1.0 –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 155 DUTY CYCLE TEMPERATURE (°C) TEMPERATURE (°C) 8610ab G13 8610ab G14 8610ab G15
Switch Drop Switch Drop Minimum On-Time
250 450 45 SWITCH CURRENT = 1A ILOAD = 1.5A 400 43 VSYNC = 0V 200 350 41 300 39 150 37 TOP SW 250 TOP SW 35 200 100 BOT SW 33 BOT SW 150 SWITCH DROP (mV) SWITCH DROP (mV) 31 MINIMUM ON-TIME (ns) 50 100 29 50 27 VOUT = 3.3V VOUT = 0.97V 0 0 25 –55 –25 5 35 65 95 125 155 0 0.5 1 1.5 2 2.5 3 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) SWITCH CURRENT (A) TEMPERATURE (°C) 8610ab G40 8610ab G41 8610ab G17
Minimum Off-Time Dropout Voltage Switching Frequency
125 800 740 VOUT = 3.3V RT = 60.4k 120 ILOAD = 0.5A 700 730 115 600 720 110 105 500 710 100 400 700 95 300 690 90 MINIMUM OFF-TIME (ns) DROPOUT VOLTAGE (V) 200 680 85 SWITCHING FREQUENCY (kHz) 80 100 670 75 0 660 –50 –25 5 35 65 95 125 155 0 0.5 1 1.5 2 2.5 3 3.5 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) LOAD CURRENT (A) TEMPERATURE (°C) 8610ab G18 8610ab G19 8610ab G20 Rev. B For more information www.analog.com 7 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