LTC3375 Datasheet | Linear Technology

8-Channel Programmable, Parallelable 1A Buck DC/DCs Features n 8-Channel Independent Step-Down DC/DCs n Master-Slave Configurable for Up to 4A Per Output Channel with a Single Inductor n Independent VIN Supply for Each DC/DC (2.25V to 5.5V) n All DC/DCs Have 0.425V to VIN Output Voltage Range n Precision Enable Pin Thresholds for Autonomous Sequencing (or I2C Control) n 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default) n I2C Selectable Phasing (90° Steps) Per Channel n Programmable Power-On Reset/Watch Dog/ Pushbutton Timing n Die Temperature Monitor Output n 48-Lead (7mm × 7mm) QFN Package Applications n General Purpose Multichannel Power Supplies n Industrial/Automotive/munications Description The LTC®3375 is a digitally programmable high efficiency multioutput power supply IC. The DC/DCs consist of eight synchronous buck converters (IOUT up to 1A each) all powered from independent 2.25V to 5.5V input supplies. DC/DC enables, output voltages, operating modes, and phasing may all be independently programmed over I2C or used in standalone mode via simple I/O with power-up defaults. The DC/DCs may be used independently or in parallel to achieve higher output currents of up to 4A per output with a shared inductor. Alarm levels for high die temperature may also be programmed via I2C with a maskable IRQ output for monitoring DC/DC and system faults. Pushbutton ON/OFF/RESET control, power-on reset, and a watchdog timer provide flexible and reliable power-up sequencing and system monitoring. The LTC3375 is available in a low profile 48-lead 7mm × 7mm QFN package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application 8-Channel 1A Multioutput Buck Regulator 4V TO 40V ALWAYS-ON LDO VSHNT VIN1 SW1 FB1 LTC3375 FBVCC VIN2 KILL SW2 2.2µH MASTER 2.2µH 0.425V TO VIN1 UP...