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LTC3617
±6A Monolithic Synchronous Step-Down Regulator for DDR Termination
Overview
Features and Benefits
- ±6A Output Current
- 2.25V to 5.5V Input Voltage Range
- ±10mV Output Voltage Accuracy
- Optimized for Low Output Voltages Down to 0.5V
- High Efficiency
- Integrated Buffer for VTTR = VDDQIN • 0.5
- Shutdown Current: <1µA
- Adjustable Switching Frequency: Up to 4MHz
- Optional Internal Compensation
- Internal Soft-Start
- Power Good Status Output
- Input Overvoltage Protected
- Thermally Enhanced 24-Pin 3mm × 5mm QFN Package
Product Details
The LTC3617 is a high efficiency monolithic synchronous buck regulator utilizing a current mode, constant frequency architecture. It operates from an input voltage range of 2.25V to 5.5V and provides a regulated output voltage equal to 0.5 • VDDQIN while sourcing and sinking up to 6A of load current. An internal amplifier provides a VTTR output voltage equal to 0.5 • VDDQIN with an output current capability of ±10mA.
The operating frequency is externally programmable up to 4MHz, allowing the use of small surface mount inductors. For switching-noise-sensitive applications, the LTC3617 can be synchronized to an external clock up to 4MHz.
Forced continuous mode operation in the LTC3617 reduces noise and RF interference. Adjustable external compensation allows the transient response to be optimized over a wide range of loads and output capacitors.
The internal synchronous switch increases efficiency and eliminates the need for an external catch diode, minimizing external component count and board space. The LTC3617 is offered in a leadless 24-pin 3mm × 5mm thermally enhanced QFN package.
Applications
- DDR Termination
- Supports DDR, DDR2 and DDR3 Standards
- Tracking Supplies
Product Categories
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)
Documentation
Reliability Data (1)
User Guides (1)
Tools & Simulations
LTspice
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Reference Designs (1)
Reference Materials
Press Releases (1)
Design Resources
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Support & Discussions
LTC3617 Discussions
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.
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.