Datasheet LTC3633A, LTC3633A-1 (Analog Devices) - 5

LTC3633A/LTC3633A-1
TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, VIN1 = VIN2 = 12V, fSW = 1MHz, L = 1µH unless otherwise noted. Efficiency vs Load Current Efficiency vs Load Current Forced Continuous Mode Burst Mode Operation Operation Efficiency vs Load Current
100 100 100 VOUT = 1.8V VOUT = 1.8V Burst Mode OPERATION 90 90 90 80 80 80 FORCED 70 70 70 CONTINUOUS OPERATION 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) L = 2.2µH 30 30 30 V 20 VIN = 4V 20 VIN = 4V 20 OUT = 5V VIN = 8V VIN = 8V VOUT = 3.3V 10 VIN = 12V 10 VIN = 12V 10 VOUT = 5V VIN = 20V VIN = 20V VOUT = 3.3V 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) 3633a G01 3633a G02 3633a G03
Efficiency vs Load Current Efficiency vs Input Voltage Reference Voltage Burst Mode Operation Burst Mode Operation vs Temperature
100 100 0.605 VOUT = 1.2V VOUT = 1.8V 90 95 80 0.603 90 70 85 60 0.601 50 80 (V) V FB 40 0.599 EFFICIENCY (%) EFFICIENCY (%) 75 30 VIN = 4V 70 I V LOAD = 10mA 20 IN = 8V I V 0.597 LOAD = 100mA IN = 12V V 65 ILOAD = 1A 10 IN =15V I V LOAD = 3A IN = 20V 0 60 0.595 0.0001 0.001 0.01 0.1 1 10 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 125 150 LOAD CURRENT (A) INPUT VOLTAGE (V) TEMPERATURE (°C) 3633a G04 3633a G05 3633a G06
Oscillator Frequency Oscillator Internal Set Frequency Load Regulation vs Temperature vs Temperature
1.6 10 2.6 Burst Mode OPERATION RT = INTVCC FORCED CONTINUOUS 8 2.4 1.2 VOUT = 1.8V 6 4 2.2 (%) 0.8 2 OUT/V 0 2.0 OUT 0.4 –2 ∆V –4 FREQUENCY (MHz) 1.8 0.0 FREQUENCY VARIATION (%) –6 1.6 –8 –0.4 –10 1.4 0 0.5 1 1.5 2 2.5 3 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 ILOAD (A) TEMPERATURE (°C) TEMPERATURE (°C) 3633a G07 3633a G08 3633a G09 3633a1fb For more information www.linear.com/LTC3633A 5 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Typical Application Related Parts