Datasheet LTC3535 (Analog Devices) - 4

LTC3535
TYPICAL PERFORMANCE CHARACTERISTICS (Each Channel) TA = 25°C, unless otherwise noted. Efficiency vs Load Current Minimum Load Resistance and VIN for VOUT = 5V Maximum Output Current vs VIN During Start-Up vs VIN
100 1000 400 10000 EFFICIENCY VOUT = 3.3V VOUT = 3.3V 90 350 VOUT = 2.5V 80 100POWER LOSS (mW) 300 VOUT = 1.8V 70 1000 60 10 250 50 (mA) 200 POWER LOSS V 40 1 I OUT OUT = 5V LOAD (Ω) EFFICIENCY (%) 150 100 30 VIN = 1.2V 100 20 V 0.1 IN = 2.4V 10 VIN = 3.6V 50 VIN = 4.2V L = 4.7µH 0 0.01 0 10 0.01 0.1 1 10 100 1000 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0.65 0.75 0.85 0.95 1.05 1.15 LOAD CURRENT (mA) VIN (V) VIN (V) 3535 G03 3535 G05 3526 G06
Burst Mode Threshold Current Burst Mode Threshold Current Start-Up Delay Time vs VIN vs VIN vs VIN
100 30 40 V 90 OUT = 1.8V VOUT = 2.5V L = 4.7µH LEAVE BURST LEAVE BURST L = 4.7µH 25 35 80 30 70 20 60 25 ENTER BURST Y (µs) 50 15 ENTER BURST 20 DELA 40 15 30 10 LOAD CURRENT (mA) LOAD CURRENT (mA) 10 20 5 10 5 0 0 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 1 1.25 1.5 1 1.25 1.5 1.75 2 VIN (V) VIN (V) VIN (V) 3535 G07 3535 G08a 3535 G08b
Burst Mode Threshold Current Burst Mode Threshold Current Oscillator Frequency Change vs VIN vs VIN vs VOUT
40 50 3 V NORMALIZED TO V OUT = 3.3V VOUT = 5V OUT = 3.3V 35 L = 4.7µH LEAVE BURST L = 4.7µH 2 40 LEAVE BURST 30 1 25 30 ENTER BURST 20 ENTER BURST 0 15 20 –1 LOAD CURRENT (mA) 10 LOAD CURRENT (mA) FREQUENCY CHANGE (%) 10 –2 5 0 0 –3 1.0 1.5 2.0 2.5 3.0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VIN (V) VIN (V) VOUT (V) 3535 G08c 3535 G08d 3535 G09 3535fa 4 Document Outline Features Description Applcations Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts