Datasheet LTC3375 (Analog Devices) - 2

link to page 1 link to page 1 link to page 1 link to page 1 link to page 3 link to page 3 link to page 3 link to page 4 link to page 7 link to page 12 link to page 15 link to page 16 link to page 16 link to page 16 link to page 17 link to page 17 link to page 19 link to page 20 link to page 20 link to page 20 link to page 20 link to page 20 link to page 21 link to page 22 link to page 22 link to page 22 link to page 22 link to page 23 link to page 23 link to page 24 link to page 24 link to page 25 link to page 25 link to page 26 link to page 26 link to page 26 link to page 26 link to page 26 link to page 28 link to page 29 link to page 29 link to page 29 link to page 29 link to page 29 link to page 31 link to page 35 link to page 36 link to page 36 LTC3375
Table oF conTenTs Features ... 1 Applications Information ..26 Applications .. 1
Buck Switching Regulator Output Voltage and
Typical Application .. 1
Feedback Network ..26
Description.. 1
Buck Regulators ...26
Absolute Maximum Ratings .. 3
Combined Buck Regulators...26
Order Information .. 3
VCC Shunt Regulator ...28
Pin Configuration .. 3
Input and Output Decoupling Capacitor Selection ..29
Electrical Characteristics ... 4
Choosing the CT Capacitor ..29
Typical Performance Characteristics ... 7
Programming the Global Register ...29
Pin Functions ..12
Programming the
RST
and
IRQ
Mask Registers ...29
Block Diagram ...15
Status Byte Read Back ...29
Operation...16
PCB Considerations ..31 Buck Switching Regulators ... 16
Typical Applications ..32
Buck Regulators with Combined Power Stages .. 16
Package Description ...35
Pushbutton Interface .. 17
Typical Application ...36
Power-Up and Power-Down Via Pushbutton ... 17
Related Parts ..36
Power-Up and Power-Down Via Enable Pin or I2C .. 19 I2C Interface ...20 I2C Bus Speed ...20 I2C Start and Stop Conditions ...20 I2C Byte Format ..20 I2C Acknowledge ..20 I2C Slave Address ...21 I2C Sub-Addressed Writing ...22 I2C Bus Write Operation ...22 I2C Bus Read Operation ..22 Error Condition Reporting Via
RST
and
IRQ
Pins ..22 Temperature Monitoring and Overtemperature Protection ...23 RESET_ALL Functionality ... 24 Programming the Operating Frequency .. 24 VCC Shunt Regulator ...25 Watchdog Timer ...25 3375fd 2 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