Quick-PWM™ Controller Provides a Complete Solution for DDR, DDR2, and DDR3 Memory
Note to Editor:
- The MAX17000 is a Quick-PWM, step-down controller for DDR, DDR2, DDR3 memory in notebook computers.
- Capable of generating all required VDDQ, VTT, and VTTR rails, this complete, single-chip solution saves space in notebook computers.
- To generate these rails, the MAX17000 integrates a step-down controller, source/sink linear regulator, and reference buffer.
- The MAX17000 is ideal for stepping-down high voltages in notebook applications.
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SUNNYVALE, CA—July 16, 2008—Maxim Integrated Products (PINK OTC MARKETS: MXIM) introduces the MAX17000 Quick-PWM, step-down controller for DDR, DDR2, and DDR3 memory in notebook computers. This single-chip solution saves valuable board space by integrating a step-down controller, source/sink linear regulator, and reference buffer, thus enabling it to generate all required VDDQ, VTT, and VTTR rails. The MAX17000 is ideal for stepping-down high voltages in notebook computers.
The step-down controller supplies the VDDQ rail, providing a ±1% accurate output voltage over the line-and-load operating range. The ±2A source/sink regulator generates the memory-termination VTT rail. Featuring a ±5mV deadband, this VTT regulator reduces output capacitance requirements and sources or sinks, making it ideal for the fast-changing short loads in memory-termination applications. The VTTR reference buffer sources and sinks ±3mA, providing the reference voltage for the memory controller and devices on the memory bus.
The MAX17000 utilizes Maxim's proprietary, Quick-PWM architecture to support wide input/output voltage ratios and provide excellent transient response, while maintaining a relatively constant switching frequency. This architecture avoids the poor load-transient timing problems of fixed-frequency, current-mode PWMs, as well as the widely varying switching frequencies in conventional constant-on-time and constant-off-time PWM schemes.
This controller offers three different operating modes: a power-efficient skip mode, a low-noise forced-PWM mode, and a standby mode that supports memory when the notebook computer is in standby operation. The MAX17000 also features overvoltage, undervoltage, and thermal protection.
The MAX17000 is available in a small, 4mm x 4mm, 24-pin TQFN package, and is fully specified over the -40°C to +85°C extended-industrial temperature range. Prices start at $2.75 (1000-up, FOB USA). An evaluation kit is available to reduce design time.
Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells over $2 billion of high-performance semiconductor products annually. It was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, Maxim has developed over 5700 products serving the industrial, communications, consumer, and computing markets. For more information, go to www.maxim-ic.com.
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