LTC3374 Datasheet | Linear Technology

Features n 8-Channel Independent Step-Down DC/DCs n Master-Slave Configurable for Up to 4A per Output Rail with a Single Inductor n Independent VIN Supplies for Each DC/DC (2.25V to 5.5V) n All DC/DCs Have 0.8V to VIN Output Range n Precision Enable Pin Thresholds for Autonomous Sequencing n 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default) n Die Temperature Monitor Output n Thermally-Enhanced 38-Lead QFN (5mm × 7mm) and TSSOP Packages APPLICATIONS n General Purpose Multichannel Power Supplies n Industrial/Automotive/munications 8-Channel Parallelable 1A Buck DC/DCs DESCRIPTION The LTC®3374 is a high efficiency multioutput power supply IC. The DC/DCs consist of eight synchronous buck converters (1A each) all powered from independent 2.25V to 5.5V input supplies. The DC/DCs may be used independently or in parallel to achieve higher currents of up to 4A per output with a shared inductor. The mon buck switching frequency may be programmed with an external resistor, synchronized to an external oscillator, or set to a default internal 2MHz clock. The operating mode for all DC/DCs may be programmed via the MODE pin. To reduce input noise the buck converters are phased in 90° steps. Precision enable pin thresholds provide reliable power-up sequencing. The LTC3374 is available in a pact 38-lead 5mm × 7mm QFN package as well as a 38-lead TSSOP package. L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode 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 2.7V TO 5.5V VIN1 2.2µH BUCK1 0.8V TO VIN1 UP TO 1A 22µF MASTER VIN2 BUCK2 2.2µH SLAVE 0.8V TO VIN2 UP TO 1A 22µF EN1 EN2 EN3 EN4 EN5 VIN7 EN6...