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
- AEC-Q100 Qualified for Automotive Applications
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 Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
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.
Documentation & Resources
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
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.