Datasheet LTC3412A (Analog Devices) - 4

LTC3412A
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current, Efficiency vs Load Current, Efficiency vs Load Current Burst Mode Operation Forced Continuous Operation
100 100 100 90 Burst Mode 95 VIN = 3.3V 90 VIN = 3.3V 80 OPERATION 90 80 70 85 VIN = 5V 70 VIN = 5V FORCED 60 CONTINUOUS 80 60 50 75 50 40 70 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 65 30 20 V 60 20 IN = 3.3V 10 VOUT = 2.5V 55 VOUT = 2.5V 10 VOUT = 2.5V FIGURE 4 CIRCUIT FIGURE 4 CIRCUIT FIGURE 4 CIRCUIT 0 50 0 0.01 0.1 1 10 0.01 0.1 1 10 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3412A GO1 3412A GO2 3412A GO3
Efficiency vs Input Voltage Efficiency vs Frequency Load Regulation
94 96 0 FIGURE 4 CIRCUIT FIGURE 4 CIRCUIT FIGURE 4 CIRCUIT 95 VIN = 3.3V VIN = 3.3V 92 1µH –0.1 1A 94 0.22µH 90 93 –0.2 0.1A 0.47µH (%) 88 92 OUT/V –0.3 86 91 OUT EFFICIENCY (%) EFFICIENCY (%) 90 ∆V –0.4 84 3A 89 82 –0.5 88 80 87 –0.6 2.5 3.0 3.5 4.0 4.5 5.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 0.5 1.0 1.5 2.0 2.5 3.0 INPUT VOLTAGE (V) FREQUENCY (MHz) LOAD CURRENT (A) 3412A GO4 3412A GO5 3412A GO6
Load Step Transient Burst Mode Burst Mode Operation Output Voltage Ripple Operation
V BURST OUT 20mV/DIV MODE 20mV/DIV VOUT 100mV/DIV PULSE SKIPPING 20mV/DIV INDUCTOR CURRENT FORCED INDUCTOR 1A/DIV CONTINUOUS 20mV/DIV CURRENT 2A/DIV FIGURE 4 CIRCUIT 5µs/DIV VIN = 3.3V 5µs/DIV VIN = 3.3V 40µs/DIV VOUT = 2.5V VOUT = 2.5V FIGURE 4 CIRCUIT F = 1MHz 3412A GO7 3412A GO8 3412A GO9 LOAD STEP = 50mA TO 2A FIGURE 4 CIRCUIT 3412aff 4 Fo F r o rmo m r o e r e inf n o f r o m r a m t a iton o n ww w w w . w line n a e r a .rco c m o / m L / T L C T 3 C 4 3 1 4 2 1 A 2 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 Revision History Related Parts