Datasheet LT3507A (Analog Devices) - 5

LT3507A
typical perForMance characteristics Efficiency vs Load Current, Efficiency vs Load Current, Switch VCESAT vs Switch Current, Channel 1, VOUT = 1.8V Channels 2 and 3, VOUT = 3.3V Channels 1, 2 and 3
90 100 0.6 INDUCTOR: NIC NPIM74C4R7MTRF TA = 25°C fSW = 450kHz 90 V 0.5 80 VIN = 6V IN = 6V V CHANNELS 2 AND 3 V 80 IN = 12V 0.4 IN = 12V 70 VIN = 36V (V) T CHANNEL 1 VIN = 36V 70 0.3 60 V CESA EFFICIENCY (%) EFFICIENCY (%) 60 0.2 50 50 0.1 INDUCTOR: NIC NPIM74C8R2MTRF fSW = 450kHz 40 40 0 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 0 0.3 0.6 0.9 1.2 1.5 1.8 0 0.5 1 1.5 2 2.5 3 IOUT (A) IOUT (A) ISW (A) 3507A G01 3507A G02 3507A G03
BOOST Pin Current vs Switch Current, Channels 1, 2 and 3 VFB vs Temperature Frequency vs RT
100 805 2.5 90 804 80 803 2.0 70 802 60 801 1.5 (mA) CHANNELS 2, 3 CHANNEL 1 50 (mV) 800 I BOOST 40 V FB 799 1.0 30 798 FREQUENCY (MHz) 20 797 0.5 10 796 0 795 0 0 0.5 1.0 1.5 2.0 2.5 3.0 –50 –30 –10 30 50 70 90 110 130 150 0 20 40 60 80 100 120 140 160 180 200 ISW (A) TEMPERATURE (°C) RT (kΩ) 3507A G04 3507A G05 3507A G06
Frequency vs Temperature Frequency vs VFB (Foldback) ITRK/SS vs Temperature
0.5 1200 1.30 RT = 40.2k TA = 25°C 1000 0.0 1.28 800 TION (%) –0.5 1.26 (µA) 600 –1.0 I TRK/SS 1.24 FRERQUENCY (kHz) 400 FREQUENCY DEVIA –1.5 200 1.22 –2.0 0 1.20 –50 –30 –10 30 50 70 90 110 130 150 0 0.2 0.4 0.6 0.8 1 –50 –30 –10 30 50 70 90 110 130 150 TEMPERATURE (°C) VFB (V) TEMPERATURE (°C) 3507A G07 3507A G08 3507A G09 3507afa For more information www.linear.com/LT3507A 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Package Description Typical Applications Related Parts