Datasheet LT8603 (Analog Devices) - 9

LT8603
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = PVIN1 = PVIN2 = 12V, EN/UVLO = 3V and PVIN3 = 3.3V unless otherwise noted. Channel 4 Minimum On-Time Channel 4 Minimum Off-Time Channel 4 ISP, ISN Input Current vs VISP – V ISP – ISN vs V ISN ISP – VISN vs VISP, V ISP , ISN
200 300 1 TA = 150°C T 0 A = 100°C 180 TA = 25°C 260 –1 TA = –45°C –2 160 220 –3 –3 140 180 –4 MIN ON-TIME (ns) –5 MINIMUM OFF-TIME (ns) , ISN INPUT CURRENT(mA) 120 T 140 ISP –6 A = 135°C FOR VISP > 2V, 34μA TA = 25°C –7 TYPICAL ACTIVE CH4 FSW = 2MHz TA = –45°C < 200nA IN SLEEP 100 100 –8 0 10 20 30 40 50 0 0.5 1 1.5 2 2.5 –50 –40 –30 –20 –10 0 10 20 30 40 50 VISP – VISN (mV) CH4 SWITCHING FREQUENCY (MHz) VISP , VISN (V) 8603 G26 8603 G27 8603 G28
Channel 1 R DSON DS(ON) vs Temperature Channel 2 RDS(ON) vs Temperature Channels 3 RDS(ON) vs Temperature
500 400 300 ISW2 = 1A ISW = 1A 250 400 300 200 (mΩ) 300 (mΩ) 200 (mΩ) 150 R DS(ON) R DS(ON) R DS(ON) 100 200 100 50 BOTTOM FET BOTTOM FET BOTTOM FET TOP FET TOP FET TOP FET 100 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8603 G29 8603 G30 8603 G31
Channel 1 Full Frequency Channel 2 Full Frequency Channel 3 Full Frequency VIN vs Load Current VIN vs Load Current VIN vs Load Current
45 45 6.0 RT = 28.7k RT = 28.7k RT = 28.7k 40 40 5.5 35 35 5.0 FULL FREQUENCY V 30 OUT = 3.3V REGION (2MHz) 30 V FULL FREQUENCY OUT = 5V 4.5 REGION (2MHz) 25 25 (V) (V) (V) 4.0 V IN 20 V IN 20 V IN FULL FREQUENCY V 3.5 15 OUT = 3.3V 15 REGION (2MHz) V V OUT = 1.8V OUT = 5V V 10 10 3.0 OUT = 1.2V 5 5 2.5 0 0 2.0 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 0 0.3 0.7 1 1.3 1.6 1.9 2.3 2.6 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 IOUT (A) IOUT (A) IOUT (A) 8603 G32 8603 G33 8603 G34 Rev. B For more information www.analog.com 9 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