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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 160kB) Download   E-Mail

Description

The MAX1692 is a low-noise, pulse-width-modulated (PWM), DC-DC step-down converter. It powers logic and transmitters in small wireless systems such as cellular phones, communicating PDAs, and handy-terminals. The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. Excellent noise characteristics and fixed-frequency operation provide easy post-filtering. The MAX1692 is ideally suited for Li-Ion battery applications. It is also useful for +3V or +5V fixed input applications. The device operates in one of four modes. Forced PWM mode operates at a fixed frequency regardless of the load. Synchronizable PWM mode allows an external switching frequency to control and minimize harmonics. Idle Mode™ (PWM/PFM) extends battery life by switching to a PFM pulse-skipping mode during light loads. Shutdown mode places the device in standby, reducing quiescent supply current to under 0.1µA. The MAX1692 can deliver over 600mA. The output voltage can be adjusted from 1.25V to VIN with the input range of +2.7V to +5.5V. Other features of the MAX1692 include high efficiency, low dropout voltage, and a 1.2%-accurate 1.25V reference. It is available in a space-saving 10-pin µMAX package with a height of only 1.11mm.

An evaluation kit is available:  MAX1692EVKIT  

Key Features		Applications/Uses
+2.7V to +5.5V Input Range Adjustable Output from 1.25V to VIN 600mA Guaranteed Output Current 95% Efficiency No Schottky Diode Required 85µA Quiescent Current 100% Duty Cycle in Dropout 750kHz Fixed-Frequency PWM Operation Synchronizable Switching Frequency Accurate Reference: 1.25V (±1.2%) Small 10-Pin µMAX Package		Battery-Operated Devices (1 Li+ or 3 NiMH/NiCd) Cell Phones Cordless Phones CPU I/O Supplies Notebook Chipset Supplies PDAs and Handy-Terminals

Diagram

Typical Operating Circuit

Application Notes

Application Note 473: Maxim's Integrated Power Supplies Provides a Highly Reliable and Space-Saving Approach to Post-Regulators - MAX1692 Application Note 478: Current-Limit Circuit for the Buck Regulator - MAX1692 Application Note 479: All-Ceramic 320mA Step-Down Converter for USB - MAX1692 Application Note 668: Managing Noise in Cell-Phone Handsets - MAX1692 Application Note 1014: Design Case Study: Designing a Power Supply for a Portable, Wireless Contact Manager - MAX1692 Application Note 2018: Protection From Blackouts: Dirt Cheap to Fully Integrated - MAX1692 Application Note 3241: Charging Batteries Using USB Power - MAX1692

Evaluation Kits

MAX1692EVKIT

Reliability Reports

Show FIT data for: MAX1692 Request Reliability Report for: MAX1692

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

MAX1692	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1692EUB			Active	µMAX;10 pin;15 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1692EUB-T			Active	µMAX;10 pin;15 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1692EUB+			Active	µMAX;10 pin;15 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1692EUB+T			Active	µMAX;10 pin;15 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes and Comments

No external schottky required

More Information

MAX1692Power Supply Cookbook

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