Datasheet LT3040 (Analog Devices) - 8

LT3040
TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, unless otherwise noted. Power Supply Ripple Rejection Power Supply Ripple Rejection Power Supply Ripple Rejection
120 120 120 110 110 110 100 100 100 90 90 90 80 80 80 70 70 70 PSRR (dB) 60 PSRR (dB) 60 PSRR (dB) 60 50 50 50 V+ = 5V V+ = 5V I V+ = V 40 LOAD = 1mA IN + 2V V 40 40 IN = 3.3V VIN = 3.3V ILOAD = 50mA CIN = 4.7µF C 30 IN = 4.7µF COUT = 4.7µF C 30 IN = 4.7µF ILOAD = 100mA C 30 OUT = 4.7µF VIN = 3.3V ILOAD = 200mA COUT = 22µF COUT = 4.7µF ILOAD = 200mA ILOAD = 200mA VIN = 0.3V 20 20 20 10 100 1k 10k 100k 1M 10M 10 100 1k 10k 100k 1M 10M 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) 3040 G19 3040 G20 3040 G21
Power Supply Rejection Ratio Fast Start Threshold Voltage Fast Start Threshold Voltage
100 160 160 V+ = 20V TURN ON V+ = 2V 90 140 CIN = 2.2µF TURN OFF 140 VIN = 0.3V 80 CIN = 2.2µF 120 120 70 TURN ON 60 100 100 VIN = 3.3V 50 CIN = 4.7µF 80 80 COUT = 4.7µF PSRR (dB) 40 T THRESHOLD (mV) T THRESHOLD (mV) ILOAD = 200mA 60 AR 60 PNP TO NPN DIFFERENTIAL AR 30 PAIR TRANSITION f = 100kHz 40 40 20 f = 500kHz FAST ST FAST ST 10 f = 1MHz 20 20 TURN OFF f = 2MHz 0 0 0 0 1 2 3 4 5 0 2 4 6 8 10 12 14 16 –50 –25 0 25 50 75 100 125 SUPPLY-TO-OUTPUT DIFFERENTIAL (V) VIN (V) TEMPERATURE (°C) 3040 G22 3040 G23 3040 G24
Fast Start Threshold Voltage Fast Start Current Limit Fast Start Current Limit
160 20 20 V+ = 2V V+ = 20V V+ = 2V VIN = 0.3V 140 V 18 18 IN = 1.25V VFS = VIN + 0.2V VFS = VIN + 0.2V VIN = 1.25V CIN = 2.2µF 16 16 120 TURN ON 14 14 100 12 12 80 10 10 T THRESHOLD (mV) 60 8 8 AR PIN CURRENT (mA) PIN CURRENT (mA) 6 6 40 V IN V IN FAST ST 4 4 20 TURN OFF 2 2 0 0 0 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3040 G25 3040 G26 3040 G27 Rev. 0 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Typical Application Related Parts