Features and Benefits
- 8-Channel Independent Step-Down DC/DCs
- Master-Slave Configurable for Up to 4A per Output Rail 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
- Precision Enable Pin Thresholds for Autonomous Sequencing
- 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default)
- Die Temperature Monitor Output
- Thermally Enhanced 38-Lead QFN (5mm × 7mm) and TSSOP Packages
The LTC3374 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 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 provide reliable power-up sequencing. The LTC3374 is available in a compact 38-lead 5mm × 7mm QFN package as well as a 38-lead 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 1953A is an 8-output power supply featuring the LTC3374. The LTC3374 has eight synchronous buck regulators each with an independent VIN supply. Up to four buck regulators may be paralleled together to create a higher power buck regulator with a single inductor. The input range of the LTC3374 is ideal for single cell Li-Ion/Polymer battery applications. The buck regulators can be enabled via external precision threshold enable pins to allow hardwired power up sequences.
Documentation & Resources
R415 Reliability Data3/23/2018
DC1953A - Demo Manual3/13/2015
Tools & Simulations
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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.