Datasheet LTC3780 (Analog Devices) - 6

LTC3780
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Efficiency vs Output Current Efficiency vs Output Current (Boost Operation) Efficiency vs Output Current (Buck Operation)
100 100 100 BURST BURST 90 90 90 DCM SC 80 80 80 DCM CCM CCM 70 70 70 CCM DCM EFFICIENCY (%) 60 EFFICIENCY (%) 60 EFFICIENCY (%) 60 50 50 50 VIN = 6V VIN = 12V VIN = 18V VOUT = 12V VOUT = 12V VOUT = 12V 40 40 40 0.01 0.1 1 10 0.01 0.1 1 10 0.01 0.1 1 10 ILOAD (A) ILOAD (A) ILOAD (A) 3780 G01 3780 G02 3780 G03
Supply Current vs Input Voltage Internal 6V LDO Line Regulation EXTVCC Voltage Drop
2500 6.5 120 VFCB = 0V 2000 6.0 100 STANDBY 5.5 80 1500 5.0 60 VOLTAGE (V) 1000 CC 4.5 VOLTAGE DROP (mV) CC 40 SUPPLY CURRENT (µA) INTV 500 4.0 EXTV 20 SHUTDOWN 0 3.5 0 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 0 10 20 30 40 50 INPUT VOLTAGE (V) INPUT VOLTAGE (V) CURRENT (mA) 3780 G04 3780 G05 3780 G06
INTVCC and EXTVCC Switch EXTVCC Switch Resistance Voltage vs Temperature vs Temperature Load Regulation
6.05 5 0 6.00 V INTV IN = 18V CC VOLTAGE 5.95 4 –0.1 5.90 (%) 5.85 3 OUT –0.2 VIN = 12V SWITCH VOLTAGE (V) 5.80 CC 5.75 2 –0.3 5.70 SWITCH RESISTANCE (Ω) CC NORMALIZED V VIN = 6V AND EXTV 5.65 EXTVCC SWITCHOVER THRESHOLD 1 –0.4 CC EXTV 5.60 FCB = 0V INTV VOUT = 12V 5.55 0 –0.5 –75 –50 –25 0 25 50 75 100 125 –75 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (A) 3780 G07 3780 G08 3780 G09 Rev G 6 For more information www.analog.com Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Block Diagram Operation Applications Information Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts