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Data Sheet

FULL DATA SHEET (PDF, 240kB) Download   E-Mail

Description

The MAX1561/MAX1599 step-up converters drive up to six white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. The step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. The MAX1561/MAX1599 include an internal, high-voltage, low-RDS(ON) N-channel MOSFET switch for high efficiency and maximum battery life. A single Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1MHz (500kHz for the MAX1599) current-mode, pulse-width modulated (PWM) operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup. Both devices are available in a space-saving, 8-pin 3mm x 3mm thin DFN package with exposed paddle (EP).

Key Features		Applications/Uses
Accurate Current Regulation for Uniform Illumination High Efficiency Up to 87% Flexible Analog or PWM Dimming Control Up to 900mW Output Power with Internal 30V MOSFET Switch Fast 1MHz (MAX1561) or 500kHz (MAX1599) PWM Operation Small, Low-Profile External Components 2.6V to 5.5V Input Range 26V (max) Output with Overvoltage Protection Optimized for Low 15mVP-P Input Ripple Soft-Start with Zero Inrush Current 0.3µA Shutdown Current Tiny 8-Pin 3mm x 3mm Thin DFN Package		Cell Phones/Smartphones e-Books and Subnotebooks PDAs, Palmtops, and Wireless Handhelds White LED Display Backlighting

Application Notes

Application Note 1804: Driving LEDs in Battery-Operated Applications: Controlling Brightness Power Efficiently - MAX1561 Application Note 3243: White-LED Boost Converter vs. Charge Pump - MAX1561 Application Note 3256: Why Drive White LEDs with Constant Current? - MAX1561

Evaluation Kits

MAX1561EVKIT

Design Guides

COMMUNICATIONS (PDF) DISPLAYS (PDF)

Reliability Reports

Show FIT data for: MAX1561 MAX1599 Reliability Report: MAX1561ETA.pdf Request Reliability Report for: MAX1599

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
MAX1561	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1561ETA+			TDFN;8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1561ETA			THIN QFN (Dual);8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1561ETA-T			THIN QFN (Dual);8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1561ETA+T			TDFN;8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1599	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1599ETA+			TDFN;8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1599ETA			THIN QFN (Dual);8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1599ETA-T			THIN QFN (Dual);8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1599ETA+T			TDFN;8 pin; Dwg: 21-0137 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX1561 MAX1599 New Product Press Release 2003-03-06

Related Products

MAX1848 White LED Step-Up Converter in SOT23 MAX1916 Low-Dropout, Constant-Current Triple White LED Bias Supply MAX1570 White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump MAX1910, MAX1912 1.5x/2x High-Efficiency White LED Charge Pumps

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