Features and Benefits
- 8-Channel 1A Independent Step-Down DC/DCs
- Master-Slave Configurable for Up to 4A of Output Current with a Single Inductor
- Independent VIN Supplies for Each DC/DC (2.25V to 5.5V)
- All DC/DCs Have 0.8V to VIN Output Range
- ±1% VFB Accuracy, for Buck 1 (1A to 4A)
- ±1% PGOOD Accuracy
- Precision Enable Pin Thresholds for Autonomous Sequencing
- 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default)
- Die Temperature Monitor Output
- Thermally Enhanced 38-Lead 5mm × 7mm QFN and TSSOP Packages
- Pin-Compatible with LTC3374
The LTC3374A is a multioutput power supply IC consisting of eight synchronous 1A buck converters, all powered from independent 2.25V to 5.5V input supplies. An upgraded pin-compatible version of the LTC3374, the LTC3374A, has higher efficiency, improved output voltage accuracy and an added overvoltage (OV) indicator.
The DC/DCs may be used independently or in parallel to achieve higher output currents of up to 4A with a shared inductor. The common 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 simplify powerup sequencing. The LTC3374A is available in a 38-lead 5mm × 7mm QFN package as well as a 38-lead exposed pad TSSOP package.
|LTC3374A||Higher efficiency, improved output voltage accuracy and an added overvoltage (OV) indicator|
- General Purpose Multichannel Power Supplies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 2440A is an 8-output power supply featuring the LTC3374A with improved efficiency and accuracy compared to the LTC3374. The LTC3374A has eight 1A synchronous buck regulators each with an independent VIN supply that can range from 2.25V to 5.5V (the minimum VCC supply voltage is 2.7V). The input range of the LTC3374A is ideal for single cell Li-Ion/Polymer battery applications. Up to four buck regulators may be paralleled together to create a higher power buck regulator with a single inductor.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC3374A Companion Parts
Recommended Related Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.