Datasheet LT8618, LT8618-3.3 (Analog Devices) - 4

LT8618/LT8618-3.3
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency (5V Output) Efficiency (5V Output) Efficiency (3.3V Output)
100 100 100 VIN = 12V 90 90 90 80 VIN = 12V VIN = 24V 70 80 V 80 VIN = 24V IN = 12V 60 V VIN = 24V IN = 48V 70 50 70 VIN = 48V 40 VIN = 48V EFFICIENCY (%) 60 EFFICIENCY (%) EFFICIENCY (%) 60 30 20 50 50 L = 33µH L = 33µH 10 L = 33µH f fSW = 2MHz SW = 2MHz fSW = 2MHz 40 0 40 0 10 20 30 40 50 60 70 80 90 100 1μ 10μ 100μ 1m 10m 100m 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA) 8618 G01 OUTPUT CURRENT (A) OUTPUT CURRENT (mA) 8618 G02 8618 G03
Efficiency (3.3V Output) FB Voltage: LT8618 OUT Voltage: LT8618-3.3
100 780 3.310 90 3.305 80 779 70 V TAGE (V) 3.300 IN = 12V TAGE (mV) 60 778 VIN = 24V 50 3.295 V TION VOL IN = 48V 40 TION VOL 777 EFFICIENCY (%) 3.290 30 20 776 FB REGULA OUT REGULA L = 33µH 3.285 10 fSW = 2MHz 0 775 3.280 1μ 10μ 100μ 1m 10m 100m −50 −25 0 25 50 75 100 125 150 −50 −25 0 25 50 75 100 125 150 OUTPUT CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 8618 G04 8618 G05 8618 G06
No-Load Supply Current Load Regulation Line Regulation (3.3V Output)
0.5 0.20 5.0 VOUT = 3.3V 0.4 0.15 IOUT = 100mA 4.6 0.3 4.2 0.10 ) 0.2 3.8  (%  (% 0.05 0.1 3.4 OUT OUT LT8618 VOUT = 3.3V 0 0 3.0 R1 = 309kΩ R2 = 1MΩ −0.1 −0.05 2.6 CHANGE IN V −0.2 CHANGE IN V INPUT CURRENT (µA) 2.2 −0.10 −0.3 1.8 LT8618-3.3 −0.15 −0.4 1.4 −0.5 −0.20 1.0 0 20 40 60 80 100 0 10 20 30 40 50 60 0 10 20 30 40 50 60 OUTPUT CURRENT (mA) 8618 G07 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8618 G08 8618 G09 Rev. 0 4 For more information www.analog.com 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