Datasheet LT8603 (Analog Devices) - 6

LT8603
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = PVIN1 = PVIN2 = 12V, EN/UVLO = 3V and PVIN3 = 3.3V unless otherwise noted. Channel 1 Efficiency vs Load Channel 2 Efficiency vs Load Channel 3 Efficiency vs Load VOUT1 OUT1 = 5V, fSW = 1MHz VOUT2 OUT2 = 3.3V, fSW = 1MHz VOUT3 OUT3 = 1.2V, fSW = 1MHz
100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 Burst Mode OPERATION 30 Burst Mode OPERATION 30 Burst Mode OPERATION 20 PVIN1 = 12V 20 PVIN2 = 12V 20 PVIN3 = 2.6V 10 PVIN1 = 24V PVIN2 = 24V PVIN3 = 3.3V PV 10 10 IN1 = 36V PVIN2 = 36V PVIN3 = 5.5V 0 0 0 0.001 0.01 0.1 1 2 0.001 0.01 0.1 1 3 0.001 0.01 0.1 1 2 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8603 G01 8603 G02 8603 G03
Channel 1 Efficiency vs Load Channel 2 Efficiency vs Load Channel 3 Efficiency vs Load VOUT1 = 5V, f OUT1 SW = 2MHz V SW OUT2 V = 3.3V, f OUT2 = 3.3V SW = 2MHz V SW = 2MHz OUT3 = 1.2V, f OUT3 SW = 2MHz SW
100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 Burst Mode OPERATION Burst Mode OPERATION 20 PVIN1 = 12V 20 Burst Mode OPERATION 20 PVIN3 = 2.6V PV 10 PVIN1 = 24V PVIN2 = 12V 10 IN3 = 3.3V PV 10 IN1 = 36V PVIN2 = 24V PVIN3 = 5.5V 0 0 0 0.001 0.01 0.1 1 2 0.001 0.01 0.1 1 3 0.001 0.01 0.1 1 2 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8603 G04 8603 G05 8603 G06
Channel 4 Efficiency vs Load Channel 4 Efficiency vs Load No-Load I (VIN) vs VIN VOUT4 OUT4 = 8V, fSW = 1MHz VOUT4 V OUT4 = 8V, f = 8V SW = 1.0MHz = 400KHz All Channels Enabled (Note 4)
100 100 400 90 90 350 80 80 300 70 70 60 60 250 μA) ( 50 50 200 BATT 40 40 I(V EFFICIENCY (%) EFFICIENCY (%) 150 30 30 100 20 LIGHT LOAD BURST V 20 BATT = 6V Burst Mode OPERATION VBATT = 6V R 10 SENSE = 4.0mΩ VBATT = 4.5V 10 R 50 SENSE = 4.0mΩ VBATT = 4.5V L4 = 1.5μH VBATT = 3V L4 = 1.5μH VBATT = 3V 0 0 0 0.001 0.01 0.1 0.0 0.8 1.5 2.3 3.0 0 10 20 30 40 50 LOAD CURRENT (A) LOAD CURRENT (A) VBATT (V) 8603 G07 8603 G08 8603 G09 Rev. B 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information System Architecture Boost Controller Buck Regulators General Functions PCB Layout Thermal Considerations Typical Applications Package Description Revision History Related Parts