Datasheet LTC7124 (Analog Devices) - 4

LTC7124
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, L = 2.2µH, f = 1MHz unless otherwise noted. Efficiency vs Load Current in Efficiency vs Load Current in Efficiency vs Load Current in Forced Continuous Mode at Burst Mode at 1MHz Forced Continuous Mode at 1MHz 2.25MHz
100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) *L = 1µH EFFICIENCY (%) *L = 1µH EFFICIENCY (%) L = 1µH 30 30 30 VOUT = 1.2V* V 20 OUT = 1.2V* V 20 20 OUT = 2.5V VOUT = 2.5V VOUT = 2.5V V 10 OUT = 3.3V V 10 OUT = 3.3V V 10 OUT = 3.3V VOUT = 5.0V VOUT = 5.0V VOUT = 5.0V 0 0 0 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 7124 G01 7124 G02 7124 G03
Efficiency vs Load Current VIN1 Supply Current for Varying Input Supply vs Temperature Line Regulation, No Load
100 20 0.5 V V OUT = 1.8V OUT = 2.5V 90 I L = 1.0µH 18 Q SHUTDOWN I FORCED CONTINUOUS MODE Q BURST MODE, SINGLE 80 16 IQ BURST MODE, DUAL 0.3 70 14 60 12 0.1 50 10 Y CURRENT (uA) ERROR (%) 40 8 –0.1 EFFICIENCY (%) OUT 30 SUPPL 6 ∆V VIN = 4V 20 V IN1 V 4 –0.3 IN = 8V 10 VIN = 12V 2 VIN = 17V 0 0 –0.5 0.001 0.01 0.1 1 10 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 8 9 1011121314151617 LOAD CURRENT (A) TEMPERATURE (°C) INPUT VOLTAGE (V) 7124 G04 7124 G05 7124 G06
Spread Spectrum Center Load Regulation RT Frequency vs Temperature Frequency vs Temperature
5 1.25 2.75 VOUT = 3.3V RRT = 100k RT TIED TO INTVCC FORCED CONTINUOUS MODE 1.20 2.65 3 1.15 2.55 1.10 2.45 1 1.05 2.35 (%) 1.00 2.25 OUT∆V –1 0.95 2.15 FREQUENCY (MHz) 0.90 FREQUENCY (MHz) 2.05 –3 0.85 1.95 0.80 1.85 –5 0.75 1.75 0 1 2 3 4 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 LOAD CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 7124 G07 7124 G08 7124 G09 7124fa 4 For more information www.linear.com/LTC7124