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Data Sheet

FULL DATA SHEET (PDF, 252kB) Download   E-Mail

Description

The MAX8645X/MAX8645Y charge pumps drive up to eight white LEDs with regulated constant current for uniform intensity. The main group of LEDs (M1–M6) can be driven up to 30mA per LED for backlighting. The flash group of LEDs (F1 and F2) is independently controlled and can be driven up to 200mA per LED (or 400mA total). Two 200mA LDOs are on-board to provide power for camera functions. The LDOs' output voltages are pin programmable to meet different camera-module requirements. The MAX8645X and MAX8645Y differ only in LDO output voltages. By utilizing adaptive 1x/1.5x/2x charge-pump modes and very-low-dropout current regulators, the MAX8645X/MAX8645Y achieve high efficiency over the full 1-cell lithium-battery voltage range. The 1MHz fixed-frequency switching allows for tiny external components, and the regulation scheme is optimized to ensure low EMI and low input ripple. The MAX8645X/MAX8645Y are available in a 28-pin TQFN, 4mm x 4mm (0.8mm max height) lead-free package.

Key Features

Power Up to Eight LEDs Up to 30mA/LED Drive for Backlight Up to 400mA Total Drive for Flash Two Internal Low-Noise 200mA LDOs 94% Max/85% Avg Efficiency (PLED/PBATT) over Li+ Battery Discharge 0.2% Typical LED Current Matching Adaptive 1x/1.5x/2x Mode Switchover Single-Wire, Serial-Pulse Interface for Brightness Control (32 Steps) 2-Bit Logic (Three Levels) Thermal TA Derating Function Low Input Ripple and EMI 2.7V to 5.5V Supply Voltage Range Soft-Start, Overvoltage, and Thermal-Shutdown Protection 28-Pin TQFN, 4mm x 4mm Package

Evaluation Kits

MAX8645YEVKIT

Design Guides

COMMUNICATIONS (PDF)

Reliability Reports

Show FIT data for: MAX8645X MAX8645Y Request Reliability Report for: MAX8645X MAX8645Y

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
MAX8645X	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8645XETI+			THIN QFN;28 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T2844+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8645XETI+T			THIN QFN;28 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T2844+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8645Y	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8645YETI+			THIN QFN;28 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T2844+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8645YETI+T			THIN QFN;28 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T2844+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2007-04-09  Product Ad: Download

Related Products

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