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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 248kB) Download   E-Mail

Description

The MAX1582/MAX1582Y drive up to six white LEDs in series with a constant current to provide display backlighting for two (main and sub-) displays in cell phones and other handheld devices. This configuration eliminates the need for ballast resistors and expensive factory calibration. The proprietary dual-output, step-up pulse-width modulation (PWM) converter includes a low RDSON n-channel MOSFET switch for high efficiency and maximum battery life. The MAX1582/MAX1582Y utilize 1MHz current-mode PWM control to allow small input and output capacitors and a small inductor, while minimizing ripple on the input supply and avoiding interference to sensitive circuitry in the equipment. Integrated overvoltage protection (27V for the MAX1582 and 18V for the MAX1582Y) eliminates the need for an external zener diode to protect the IC from open circuit. Flexible dimming control utilizes either an analog control signal or direct digital PWM control without external RC filtering. This also increases dimming accuracy at low brightness levels. The PWM dimming signal can be any frequency from 200Hz to 200kHz. Softstart eliminates inrush current during startup. The MAX1582/MAX1582Y are available in tiny 4 x 4 chip-scale (UCSP™) and 12-pin thin QFN packages.

An evaluation kit is available:  MAX1582EVKIT  

Key Features		Applications/Uses
Accurate Current Regulation for Uniform Illumination Lights Up Two LED Sections for Main and Subdisplays Up to 84% Efficiency Internal High-Power, 30V MOSFET Low 15mVP-P Input Ripple Flexible Dimming Control Analog DAC Controlled Direct-Digital PWM (No RC Required) from 200Hz to 200kHz Overvoltage Protection to Eliminate Zener Diode Constant 1MHz PWM Operation Low-Profile Inductor and Capacitors Soft-Start Eliminates Inrush Current 2.6V to 5.5V Input 0.01µA (typ) Shutdown Current Tiny UCSP (2.1mm x 2.1mm x 0.61mm) and Thin QFN (4mm x 4mm) Packages		Cell Phones with One or Two Displays Other Handheld Devices with Dual Displays Smartphones, Palmtops, and Wireless Handhelds

Diagram

Typical Application Circuit

Application Notes

Application Note 3174: Selecting Power Management for Cellular Handsets - MAX1582

Evaluation Kits

MAX1582EVKIT

Design Guides

Power Management for Battery-Powered Equipment (PDF)

Reliability Reports

Show FIT data for: MAX1582 Request Reliability Report for: MAX1582

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

MAX1582	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1582ETC+			Active	TQFN;12 pin;16.8 mm² Outline Drawing: 21-0139 (PDF) Land Pattern: 90-0068 (PDF) Use pkgcode/variation: T1244+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1582ETC+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1582ETC			Active	TQFN;12 pin;16.8 mm² Outline Drawing: 21-0139 (PDF) Land Pattern: 90-0068 (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1582ETC-T			Active	TQFN;12 pin;16.8 mm² Outline Drawing: 21-0139 (PDF) Land Pattern: 90-0068 (PDF) Use pkgcode/variation: T1244-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

More Information

Topmark Coding: MAX1582 New Product Press Release 2003-04-29

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