Product Summary

The MAX1848EKA-T is a White LED Step-Up Converter. The MAX1848EKA-T includes an internal, high-voltage, low RDSON N-channel MOSFET switch for high efficiency and maximum battery life. A single analog voltage Dual Mode input provides a simple means of brightness adjustment and on/off control. Fast 1.2MHz current mode PWM control 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. The The MAX1848EKA-T is available in space-saving 8-pin thin QFN (3mm * 3mm) and 8-pin SOT23 packages. The applications of the MAX1848EKA-T are Cell Phones and Smart Phones, PDAs, Palmtops, and Wireless Handhelds, e-Books and Subnotebooks, White LED Display Backlighting.

Parametrics

MAX1848EKA-T absolute maximum ratings: (1)V+ to GND:-0.3V to +6V; (2)PGND to GND:-0.3V to +0.3V; (3)LX, OUT to GND:-0.3V to +14V; (4)LX to OUT:-14V to +0.3V; (5)CTRL to GND:-0.3V to +6V or (V+ + 2V); (6)COMP, CS to GND:-0.3V to (V+ + 0.3V); (7)LX Current:0.45ARMS; (8)Continuous Power Dissipation:777mW; (9)Operating Temperature Range:-40℃ to +85℃; (10)Junction Temperature:+150℃; (11)Storage Temperature Range:-60℃ to +150℃; (12)Lead Temperature (soldering, 10s):+300℃.

Features

MAX1848EKA-T features: (1)Constant Current Regulation for Uniform Illumination; (2)High 87% Efficiency; (3)Analog or Logic Control of LED Intensity; (4)0.8W Output Power with Internal High-Voltage MOSFET Switch; (5)Small, Low-Profile External Components; (6)2.6V to 5.5V Input Range; (7)13V Maximum Output with Overvoltage Protection; (8)Optimized for Low Input Ripple; (9)Programmable Soft-Start ; (10)0.3μA Shutdown Current; (11)Small 8-pin Thin QFN (3mm * 3mm) and 8-Pin SOT23 Packages.

Diagrams

MAX1848EKA-T pin configuration

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