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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 900kB) Download   E-Mail

Description

The MAX8720 step-down controller is intended for core CPU DC-DC converters in notebook computers. It features a dynamically adjustable output, ultra-fast transient response, high DC accuracy, and the high efficiency needed for leading-edge CPU core power supplies. Maxim's proprietary Quick-PWM™ quick-response, constant-on-time, PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency. The output voltage can be dynamically adjusted through the 6-bit digital-to-analog converter (DAC) over a 0.275V to 1.850V range in 25mV steps. The MAX8720 has independent four-level logic inputs for setting the suspend voltage (S0-S1). Precision slew-rate control provides "just-in-time" arrival at the new DAC setting, minimizing surge currents to and from the battery. The internal DAC of the MAX8720 is synchronized to the slew-rate clock for improved operation under aggressive power management of newer chipsets and operating systems that can make incomplete mode transitions. Remote feedback and ground-sense inputs allow easy compensation for IR drops in PC board traces. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the 5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size. The MAX8720 is available in a 28-pin QSOP or 36-pin 6mm x 6mm thin QFN package.

An evaluation kit is available:  MAX8720EVKIT  

Key Features		Applications/Uses
Quick-PWM Architecture ±1% VOUT Accuracy Over Line and Load 6-Bit On-Board DAC with Input Muxes Precision-Adjustable VOUT Slew Control 0.275V to 1.850V Output Adjust Range Remote Feedback and Ground Sense Supports Voltage-Positioned Applications 2V to 28V Battery Input Range 200kHz/300kHz/550kHz/1000kHz Switching Frequency Over/Undervoltage Protection Drives Large Synchronous-Rectifier FETs 800µA (typ) ICC Supply Current 10µA (typ) Shutdown Supply Current 2V ±0.75% Reference Output PGOOD Blanking During Transition		CPU Core Supply Converters GPU Core Supply Converters Notebook and Subnotebook Computers

Diagram

Block Diagram

Evaluation Kits

MAX8720EVKIT

Reliability Reports

Reliability Report: MAX8720.pdf Show FIT data for: MAX8720

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: 1-8 of 8

MAX8720	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8720EEI			Active	QSOP;28 pin;62 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8720EEI-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8720EEI+			Active	QSOP;28 pin;62 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8720EEI+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8720ETX			Active	TQFN;36 pin;37 mm² Outline Drawing: 21-0141 (PDF) Land Pattern: 90-0050 (PDF) Use pkgcode/variation: T3666-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8720ETX-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8720ETX+			Active	TQFN;36 pin;37 mm² Outline Drawing: 21-0141 (PDF) Land Pattern: 90-0050 (PDF) Use pkgcode/variation: T3666+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8720ETX+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet

More Information

New Product Press Release 2004-08-10

Related Products

MAX1718 Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning (IMVP-II)

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