Datasheet LT3048 (Analog Devices) - 5

LT3048 Series
TYPICAL PERFORMANCE CHARACTERISTICS LT3048 FB Voltage LT3048 FB Load Regulation LT3048 Switching Frequency
1.260 1.260 1.3 1.255 1.255 1.2 1.250 1.250 1.245 1.245 1.1 1.240 1.240 1.0 TAGE (V) 1.235 TAGE (V) 1.235 0.9 1.230 1.230 FB VOL FB VOL 1.225 1.225 0.8 1.220 1.220 SWITCHING FREQUENCY (MHz) 0.7 1.215 1.215 1.210 1.210 0.6 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 40 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) LOAD CURRENT (mA) TEMPERATURE (°C) 3048 G01 3048 G02 3048 G03
LT3048-15 LDOOUT Load LT3048 LDOOUT Noise LT3048-15 Efficiency Regulation
1000 80 15.3 ) 70 Hz /√ 100 15.2 60 Y (nV 15.1 50 10 TAGE (V) 40 15.0 V 1 IN = 3.6V VOUT = 1.235V EFFICIENCY (%) 30 LDOOUT = 15V L = 5.6μH L = 10µH 14.9 C LDOOUT VOL BSTOUT = 4.7μF 20 DCR = 650mΩ 0.1 CLDOOUT = 1μF VIN = 2.7V NOISE SPECTRAL DENSIT C 14.8 BYP = 1nF 10 VIN = 3.3V ILOAD = 40mA VIN = 3.6V 0.01 0 14.7 10 100 1k 10k 100k 1M 0 5 10 15 20 25 0 5 10 15 20 25 30 35 40 FREQUENCY (Hz) LOAD CURRENT (mA) LOAD CURRENT (mA) 3048 G04 3048 G06 3048 G05
LT3048-15 LDOOUT Voltage LT3048-15 Transient Response LT3048-15 LDOOUT Noise
15.3 50 70 10000 V 0 OUT 60 ) 15.2 Hz /√ 1000 LOAD CURRENT (mA) –50 50 15.1 Y (nV 100 TAGE (V) –100 40 15.0 –150 30 V 10 IN = 3.6V I V 14.9 LOAD OUT = 15V LDOOUT VOL –200 20 L = 10μH CBSTOUT = 4.7μF 14.8 1 CLDOOUT = 1μF OUTPUT VOLTAGE DEVIATION (mV) –250 10 NOISE SPECTRAL DENSIT CBYP = 1nF ILOAD = 24mA 14.7 –300 0 0.1 –50 –25 0 25 50 75 100 125 V 3048 G08 IN = 3.6V 10µs/DIV 10 100 1k 10k 100k 1M TEMPERATURE (°C) VOUT = 15V FREQUENCY (Hz) 3048 G07 L = 10µH 3048 G09 CLDOOUT = 1µF CBYP = 1nF ILOAD = 4mA TO 20mA Rev B For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions LT3048 LT3048-xx LT3048 Block Diagrams Operation Applications Information Package Description Revision History Related Parts