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Data Sheet

FULL DATA SHEET (PDF, 896kB) Download   E-Mail

Description

The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chip-set/RAM supplies in notebook computers. 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 MAX1714 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs. 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 MAX1714 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 1V. The MAX1714A is available in a 20-pin QSOP package and includes overvoltage protection. The MAX1714B is available in a 16-pin QSOP package with no overvoltage protection. For applications requiring VID compliance or DAC control of output voltage, refer to the MAX1710/MAX1711 data sheet. For a dual output version, refer to the MAX1715 data sheet.

Key Features		Applications/Uses
Ultra-High Efficiency No Current-Sense Resistor (Lossless ILIMIT) Quick-PWM with 100ns Load-Step Response 1% VOUT Accuracy Over Line and Load 2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range 2V to 28V Battery Input Range 200/300/450/600kHz Switching Frequency Overvoltage Protection (MAX1714A) Undervoltage Protection 1.7ms Digital Soft-Start Drives Large Synchronous-Rectifier FETs 2V ±1% Reference Output Power-Good Indicator		1.8V and 2.5V I/O Supplies Chipset/RAM Supplies as Low as 1V CPU Core Supplies Notebook Computers

Diagram

Minimal Operating Circuit

Application Notes

Application Note 3753: Thermistor Linearizes Current Limit - MAX1714

Evaluation Kits

MAX1714AEVKIT MAX1714BEVKIT

Reliability Reports

Reliability Report: MAX1714.pdf MAX1714A.pdf Show FIT data for: MAX1714 Request Reliability Report for: MAX1714B

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
MAX1714A	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1714AEEP			QSOP;20 pin;54 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1714AEEP-T			QSOP;20 pin;54 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1714AEEP+			QSOP;20 pin;54 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1714AEEP+T			QSOP;20 pin;54 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1714B	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1714BEEE			QSOP;16 pin;31 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
MAX1714BEEE-T			QSOP;16 pin;31 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
MAX1714BEEE+			QSOP;16 pin;31 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
MAX1714BEEE+T			QSOP;16 pin;31 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

Notes and Comments

Power Good Indicator, 2V ±1% Reference Output, Drives Large Synchronous Rectifier FETs

More Information

New Product Press Release 1999-11-05

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