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Data Sheet

FULL DATA SHEET (PDF, 384kB) Download   E-Mail

Description

The MAX1572 is a fixed-frequency, synchronous step-down DC-to-DC converter to power low-voltage microprocessor/DSP cores in portable equipment requiring high efficiency in a limited PC board area. The features are optimized for high efficiency over a wide load range, small external component size, low output ripple, and excellent transient response. The input supply voltage range is from 2.6V to 5.5V, while the output is internally fixed from 0.75V to 2.5V in 50mV increments with a guaranteed output current of 800mA. The high 2MHz switching allows tiny low-cost capacitors and a low-profile inductor, while the power-saving pulse-group mode reduces quiescent current to 48µA (typ) with light loads. To reduce noise and RF interference, the converter can be configured to provide forced-PWM operation. The MAX1572 includes a low on-resistance internal MOSFET switch and synchronous rectifier to maximize efficiency and minimize external component count. No external diode is needed. Other features include soft-start to eliminate inrush current at startup and a 170ms (min) RESET-bar output to provide power-on/undervoltage reset. The MAX1572 is available in a 12-pin, 4mm x 4mm thin QFN package with exposed paddle.

Key Features		Applications/Uses
Up to 97% Efficiency 2MHz PWM Switching 800mA Guaranteed Output Current Low 48µA Quiescent Current Power-Saving Modes: Pulse-Group, Pulse-Skip, Forced-PWM Mode 0.75V to 2.5V Preset Output Range (in 50mV Increments) Voltage-Positioning Load Transients 5mVP-P Output Ripple Tiny 2.2µH Inductor 10µF Ceramic Output Capacitor Low 0.1µA Shutdown Current No External Schottky Diode Required Soft-Start with Zero Inrush Current 170ms (min) active-low RESET Output Small 12-Pin, 4mm x 4mm Thin QFN Package		Cell Phones/Smartphones Digital Cameras and Camcorders Handheld Instruments (PDAs, Palmtops) MP3 and DVD Players PCMCIA Cards PDAs, Palmtops, and Notebook Computers

Diagram

Typical Operating Circuit

Evaluation Kits

MAX1572EVKIT

Design Guides

D/A CONVERTERS (PDF)

Reliability Reports

Show FIT data for: MAX1572 Request Reliability Report for: MAX1572

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: 1-14 of 14
MAX1572	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1572ETC180+T			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1572ETC180+			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1572ETC130+T			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1572ETC130+			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1572ETC250+T			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1572ETC250+			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1572ETC250-T			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1572ETC250			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1572ETC180-T			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1572ETC180			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1572ETC150-T			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1572ETC150			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1572ETC130-T			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1572ETC130			THIN QFN;12 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

More Information

Topmark Coding: MAX1572 New Product Press Release 2003-05-16

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