Datasheet LTC3862 (Linear Technology) - 5

LTC3862
Typical perForMance characTerisTics Efficiency and Power Loss vs Efficiency vs Output Current Input Voltage
100 96 4000 VOUT = 48V 95 EFFICIENCY 95 90 3500 POWER LOSS (mW) 85 VIN = 35V 94 80 3000 75 V 93 IN = 24V 70 POWER LOSS 2500 EFFICIENCY (%) EFFICIENCY (%) 92 65 VIN = 12V 60 2000 91 55 VOUT = 48V IOUT = 1A 50 90 1500 10 100 1000 10000 0 10 20 30 40 LOAD CURRENT (mA) INPUT VOLTAGE (V) 3862 G01 3862 G02
Quiescent Current vs Input Load Step Inductor Current at Light Load Voltage
3.00 ILOAD 2.75 5A/DIV SW1 1A TO 5A 50V/DIV 2.50 2.25 IL1 5A/DIV SW2 2.00 50V/DIV 1.75 IL2 1.50 5A/DIV IL1 2A/DIV 1.25 VOUT I 1.00 500mV/DIV L2 2A/DIV QUIESCENT CURRENT (mA) 0.75 V 3862 G03 IN = 24V 500µs/DIV V 3862 G04 0.50 IN = 12V 1µs/DIV VOUT = 48V VOUT = 48V 0.25 ILOAD = 100mA 0 4 8 12 16 20 24 28 32 36 INPUT VOLTAGE (V) 3862 G05
Shutdown Quiescent Current vs Shutdown Quiescent Current vs Quiescent Current vs Temperature Input Voltage Temperature
1.90 45 50 VIN = 12V 1.85 40 40 1.80 35 30 1.75 30 25 1.70 20 1.65 20 15 QUIESCENT CURRENT (mA) 1.60 SHUTDOWN CURRENT (µA) 10 SHUTDOWN CURRENT (µA) 10 1.55 5 1.50 0 0 –50 –25 0 25 50 75 100 125 150 4 8 12 16 20 24 28 32 36 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3862 G06 3862 G07 3862 G08 3862fc For more information www.linear.com/LTC3862 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts