Datasheet LT8618, LT8618-3.3 (Analog Devices) - 5

LT8618/LT8618-3.3
TYPICAL PERFORMANCE CHARACTERISTICS Top FET Current Limit Top FET Current Limit vs Duty Cycle vs Temperature Switch Drop vs Temperature
200 220 600 SWITCH CURRENT = 100mA 215 500 190 210 400 205 TOP SW 180 200 300 195 200 SWITCH DROP (mV) 170 SWITCH CURRENT (mA) 190 BOT SW TOP FET CURRENT LIMIT (mA) 100 185 160 180 0 0 20 40 60 80 100 −50 −25 0 25 50 75 100 125 150 −50 −25 0 25 50 75 100 125 150 DUTY CYCLE (%) TEMPERATURE (°C) 8618 G10 TEMPERATURE (°C) 8618 G11 8618 G12
Minimum On-Time Minimum Off-Time Switch Drop vs Switch Current vs Temperature vs Temperature
400 40 110 39 105 38 300 37 100 36 200 35 95 TOP SW 34 SWITCH DROP (mV) 90 33 100 MINIMUM ON-TIME (ns) MINIMUM OFF-TIME (ns) BOT SW 32 85 31 0 30 80 0 20 40 60 80 100 −50 −25 0 25 50 75 100 125 150 −50 −25 0 25 50 75 100 125 150 SWITCH CURRENT (mA) 8618 G13 TEMPERATURE (°C) TEMPERATURE (°C) 8618 G14 8618 G15
Switching Frequency Dropout Voltage vs Load Current vs Temperature Burst Frequency vs Load Current
400 2030 2500 L=MOS6020-333ML 350 V 2250 OUT = 3.3V 2020 2000 300 2010 1750 250 2000 1500 TAGE (mV) 200 1990 1250 150 1980 1000 750 DROPOUT VOL 100 1970 SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) 500 L = 33µH 50 1960 250 VIN = 12V RT = 18.2kΩ VOUT = 3.3V 0 1950 0 0 10 20 30 40 50 60 70 80 90 100 −50 −25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 LOAD CURRENT (mA) TEMPERATURE (°C) LOAD CURRENT (mA) 8618 G16 8618 G17 8618 G18 Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts