Datasheet LTC3119 (Analog Devices) - 8

LTC3119
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. VCC UVLO Threshold vs Temperature Efficiency vs Switching Frequency
2.40 95 RISING V 2.38 OUT = 5V FALLING VOUT = 12V 2.36 94 2.34 93 2.32 TAGE (V) 2.30 92 2.28 EFFICIENCY (%) 2.26 91 THRESHOLD VOL 2.24 90 2.22 2.20 89 –60 –30 0 30 60 90 120 150 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0 TEMPERATURE ( °C) FREQUENCY (MHz) 3119 G24 3119 G25
Minimum Current to Avoid Pulse Burst Mode Operation Threshold Skipping IN Avoid Pulse Skipping
1.0 200 VOUT = 5V 0.9 175 fSW = 1MHz L = 2.2μH 0.8 150 0.7 125 0.6 100 0.5 75 OUTPUT CURRENT (A) LOAD CURRENT (mA) 0.4 50 VOUT = 3.3V 0.3 VOUT = 5V 25 VOUT = 12V 0.2 0 2 4 6 8 10 12 14 16 18 2 4 6 8 10 12 14 16 18 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3119 G26 3119 G27
Maximum Reverse Current During MPPC Control (VMPPC MPPC Control (V < 0.86) MPPC ≤ 0.83)
200 VOUT = 12V L = 2.2μH 180 fSW = 1MHz L = 6.8μH 160 140 120 100 80 60 REVERSE CURRENT (mA) 40 20 0 2 4 6 8 10 12 14 16 18 INPUT VOLTAGE (V) 3119 G28 3119fb 8 For more information www.linear.com/LTC3119 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Introduction PWM Mode Operation VCC Regulator Current Mode Control Error Amplifiers Current Limit and Zero Current Detection Soft-Start Maximum Power Point Control (MPPC) Burst Mode Operation Power Good Indicator Thermal Considerations Applications Information Typical Applications Package Description Revision History Typical Application Related Parts