Datasheet LTC3624, LTC3624-2 (Analog Devices) - 5

LTC3624/LTC3624-2
Typical perForMance characTerisTics TJ = 25°C, unless otherwise noted. Efficiency vs Load Current in Efficiency vs Load Current in Efficiency vs Load Current at 1MHz Burst Mode Operation at 2.25MHz Dropout
100 100 100 90 90 90 80 80 80 Burst Mode 70 70 70 OPERATION 60 60 60 50 50 50 FORCE CONTINUOUS 40 40 Burst Mode OPERATION 40 MODE EFFICIENCY (%) Burst Mode OPERATION EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 V 20 20 OUT = 5V VOUT = 5V VIN = 5V 10 VOUT = 3.3V 10 VOUT = 3V 10 100% DUTY CYCLE V V IN = 12V OUT = 2.5V VIN = 12V VOUT = 2.5V FREQ = 1MHz 0 0 0 0.0001 0.001 0.01 0.1 1 2 0.001 0.01 0.1 1 2 0.0001 0.001 0.01 0.1 1 2 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 36242 G01 36242 G02 36242 G03
I Burst Mode Operation Q vs VIN IQ vs Temperature
10 12 9 8 10 SW 7 5V/DIV 8 6 VOUT (µA) 5 (µA) 6 AC-COUPLED I Q I Q 50mV/DIV 4 SLEEP SLEEP 3 4 IL 1A/DIV 2 2 4µs/DIV 36242 G06 1 SHUTDOWN SHUTDOWN VIN = 12V 0 0 VOUT = 2.5V 0 2 4 6 8 10 12 14 16 18 20 –50 0 50 100 150 Burst Mode OPERATION V I IN (V) TEMPERATURE (°C) OUT = 30mA L = 2.2µH 36242 G04 36242 G05
Pulse-Skipping Mode Operation Load Transient Response Soft-Start Operation
V SW OUT RUN 200mV/DIV 5V/DIV 10V/DIV VOUT IL AC-COUPLED I 2A/DIV L 50mV/DIV 0.5A/DIV PGOOD VOUT 5V/DIV 1V/DIV IL ILOAD 1A/DIV 2A/DIV 36242 G07 4µs/DIV 36242 G08 40µs/DIV 36242 G09 1ms/DIV VIN = 12V VIN = 12V VIN = 12V VOUT = 2.5V VOUT = 2.5V VOUT = 2.5V PULSE-SKIPPING MODE ILOAD = 0A to 1.8A ILOAD = 1A IOUT = 10mA FORCED CONTINUOUS MODE L = 2.2µH 36242fd For more information www.linear.com/LTC3624 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts