Datasheet LTC3122 (Analog Devices) - 4

LTC3122
Typical perForMance characTerisTics Configured as front page application unless otherwise specified. Efficiency vs Load Current, Efficiency vs Load Current, Efficiency vs Load Current, VOUT = 5V VOUT = 7.5V VOUT = 12V
100 100 100 90 90 90 BURST BURST BURST 80 80 80 70 70 70 60 60 60 50 50 50 PWM PWM PWM 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 V 20 20 IN = 4.2V V V IN = 5.4V IN = 5.4V 10 VIN = 3.3V 10 VIN = 3.8V 10 VIN = 4.2V VIN = 0.6V V V IN = 2.3V IN = 2.6V 0 0 0 0.01 0.1 1 10 100 1000 10000 0.01 0.1 1 10 100 1000 10000 0.01 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3122 G01 3122 G02 3122 G03
PWM Mode Operation Load Transient Response Inrush Current Control
VOUT VOUT SD 20mV/DIV 500mV/DIV 5V/DIV AC-COUPLED AC-COUPLED VOUT INDUCTOR 800mA 5V/DIV CURRENT OUTPUT 1A/DIV CURRENT INPUT 500mA/DIV CURRENT ILOAD = 200mA 80mA 80mA 1A/DIV 1µs/DIV 3122 G04 500µs/DIV 3122 G05 2ms/DIV 3122 G06
RDS(ON) vs Temperature, Oscillator Frequency Feedback vs Temperature Both NMOS and PMOS vs Temperature
0.2 80 1.0 0.1 60 0.5 0 40 0 –0.1 FROM 25°C (%) FROM 25°C (%) –0.2 20 –0.5 FB DS(ON) –0.3 0 –1.0 –0.4 CHANGE IN V –20 –1.5 –0.5 CHANGE IN R CHANGE IN FREQUENCY FROM 25°C (%) –0.6 –40 –2.0 –60 –10 40 90 140 –50 –10 30 70 110 150 –60 –10 40 90 140 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3122 G07 3122 G08 3122 G09 3122fa 4 For more information www.linear.com/LTC3122 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 Typical Application Related Parts