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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 344kB) Download   E-Mail

Description

The MAX1917 provides a complete power-management solution for DDR memory. It contains a synchronous buck controller and an amplifier to generate 1/2VDDR voltage for VTT and VTTR. The VTT and VTTR voltages are maintained within 1% of 1/2VDDR. The controller operates in synchronous rectification mode to ensure balanced current sourcing and sinking capability of up to 25A. With a shutdown current of less than 5µA, the MAX1917 is the best choice for low-power notebook applications, as well as servers and desktop computers. An all N-FET design optimizes efficiency. The MAX1917 can also be used for generating VDDR and as a general-purpose step-down controller with variable switching frequency as high as 1MHz with few additional components. The MAX1917 uses Maxim's proprietary Quick-PWM™ architecture for fast transient response up to 96% efficiency, and the smallest external components. Output current monitoring is achieved without sense resistors by monitoring the bottom FET's drain-to-source voltage. The current-limit threshold is programmable through an external resistor. The MAX1917 comes in a space-saving 16-pin QSOP package.

An evaluation kit is available:  MAX1917EVKIT  

Key Features		Applications/Uses
25A Sourcing and Sinking Current Automatically Sets VTT to 1/2VDDR VTT and VTTR Within 1% of 1/2VDDR Smallest Output Capacitors 4.5V to 14V (or 28V with Resistor-Divider) Input Voltage Range 1.5V to 3.6V Input DDR Range 200kHz/300kHz/400kHz/550kHz Preset Switching Frequencies Variable Switching Frequency of Up to 1MHz Overcurrent Protection Without Current-Sense Resistor Internal Soft-Start VTTR Reference Sources and Sinks Up to 25mA Quick-PWM Control for Fastest Loop Response Up to 96% Efficiency 16-Pin QSOP Package		AGTL Bus Termination Supplies Cell Phone Base Stations DDR Memory Power Supplies Desktop Computers Networking Systems Notebook Computers Processor or DSP Core Supply Storage

Diagram

Typical Operating Circuit

Application Notes

Application Note 735: Layout Considerations for Non-Isolated DC-DC Converters - MAX1917 Application Note 993: Adding Voltage Droop to DDR Memory Termination Voltage Supply Reduces Output Capacitance - MAX1917 Application Note 1053: VDDQ Supply for Server DDR Memory Using PWM Step-Down Controller - MAX1917 Application Note 3356: MAX1917 Provides Pre-Bias Soft Start for Redundant Supply - MAX1917 Application Note 3940: MAX8632 PCB Layout Optimization - MAX1917

Evaluation Kits

MAX1917EVKIT

Reliability Reports

Reliability Report: MAX1917.pdf Show FIT data for: MAX1917

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

MAX1917	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1917EEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1917EEE-T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1917EEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1917EEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2002-02-27  MAX1916, MAX1917Power Supply Cookbook

Related Products

MAX1718 Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning (IMVP-II) MAX1809 3A, 1MHz, DDR Memory Termination Supply MAX1714, MAX1714A, MAX1714B High-Speed Step-Down Controller for Notebook Computers More Like This: View Product Families for Similar Products See All Step-Down Switching Regulators (264 Products)

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