Datasheet LTC3375 (Analog Devices) - 8

LTC3375
Typical perForMance characTerisTics Enable Pin Precision Threshold VTEMP vs Temperature Enable Threshold vs Temperature vs Temperature
1400 900 420 ALL REGULATORS DISABLED ALL REGULATORS DISABLED 850 1200 VCC = 3.3V VCC = 3.3V 415 800 1000 410 750 EN RISING 800 405 700 EN RISING (mV) 600 650 400 EN FALLING V TEMP 600 EN FALLING 400 ACTUAL VTEMP 395 EN THRESHOLD (mV) 550 EN THRESHOLD (mV) 200 390 500 0 385 450 IDEAL VTEMP –200 400 380 0 20 40 60 80 100 120 140 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3375 G10 3375 G11 3375 G12
Buck VIN Supply Current Buck VIN Supply Current vs Temperature vs Temperature VOUT vs Temperature
50 Burst Mode OPERATION 550 FORCED CONTINUOUS MODE 1.88 FORCED CONTINUOUS MODE FB = 850mV 500 FB = 0V I 1.86 LOAD = 0mA 40 450 VIN = 5.5V (µA) 400 1.84 VIN = 3.3V 350 (µA) 30 V 1.82 IN = 2.25V VIN = 5.5V 300 (V) VIN = 5.5V 1.8 250 V V OUT IN = 2.25V 20 I VIN_BURST 200 1.78 VIN = 2.25V VIN = 3.3V V 150 IN = 3.3V 1.76 10 I VIN_FORCED_CONTINUOUS 100 50 1.74 0 0 1.72 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3375 G13 3375 G14 3375 G15
PMOS Current Limit vs Temperature PMOS RDS(ON) vs Temperature NMOS RDS(ON) vs Temperature
2.6 600 600 VIN = 3.3V VIN = 2.25V VIN = 2.25V 550 VIN = 3.3V 550 VIN = 3.3V 2.5 VIN = 5.5V VIN = 5.5V 500 500 2.4 450 450 (A) (mΩ) (mΩ) 2.3 400 400 I FWD R DS(ON) 350 R DS(ON) 350 2.2 300 300 2.1 250 250 2 200 200 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3375 G17 3375 G18 3375 G16 3375fd 8 For more information www.linear.com/3375 Document Outline Features Applications Description Typical Application Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Buck Switching Regulators Buck Regulators with Combined Power Stages Pushbutton Interface Power-Up and Power-Down Via Pushbutton Power-Up and Power-Down Via Enable Pin or I2C I2C Interface I2C Bus Speed I2C Start and Stop Conditions I2C Byte Format I2C Acknowledge I2C Slave Address I2C Sub-Addressed Writing I2C Bus Write Operation I2C Bus Read Operation Error Condition Reporting Via RST and IRQ Pins Temperature Monitoring and Overtemperature Protection RESET_ALL Functionality Programming the Operating Frequency VCC Shunt Regulator Watchdog Timer Applications Information Buck Switching Regulator Output Voltage and Feedback Network Buck Regulators Combined Buck Regulators VCC Shunt Regulator Input and Output Decoupling Capacitor Selection Choosing the CT Capacitor Programming the Global Register Programming the RST and IRQ Mask Registers Status Byte Read Back Typical Applications Package Description Typical Application Related Parts