Product Summary

The MAX1554ETA+T is a High-Efficiency, 40V Step-Up Converter for 2 to 10 White LEDs. The MAX1554ETA+T with a constant current to provide efficient display backlighting in cellular phones, PDAs, and other hand-held devices. The step-up converter includes an internal 40V, low RDSON, N-channel MOSFET switch for high efficiency and maximum battery life. The MAX1553 has a current limit of 480mA for driving two to six white LEDs, while the MAX1554ETA+T has a current limit of 970mA for driving up to 10 white LEDs. The applications of the MAX1554ETA+T include Cellular Phones, PDA, Palmtop, and Wireless Handhelds, Color Display Backlight.

Parametrics

MAX1554ETA+T absolute maximum ratings: (1)VCC, FB, OV to GND: -0.3V to +6.0V; (2)LX to GND: -0.3V to +45V; (3)EN, BRT, SS to GND: -0.3V to (VCC + 0.3V); (4)ILX: 0.9ARMS; (5)Continuous Power Dissipation (TA = +70℃) 8-Pin 3mm x 3mm TDFN (derate 24.4mW/°C above +70℃): 1951mW; (6)Operating Temperature Range: -40 to +85℃; (7)Junction Temperature: +150℃; (8)Storage Temperature Range: -65°C to +150℃; (9)Lead Temperature (soldering, 10s): +300℃.

Features

MAX1554ETA+T features: (1)Constant-Current Regulation for Even LED Illumination; (2)Internal 40V MOSFET Switch Capable of Driving 10 LEDs; (3)Small, Low-Profile External Components; (4)2.7V to 5.5V Input Range; (5)Up to 88% Efficiency Driving 6 LEDs; (6)Up to 82% Efficiency Driving 9 LEDs (20mA, VCC = 3.6V); (7)Analog or PWM Control of LED Intensity; (8)Optimized for Low Input Ripple; (9)Soft-Start to Minimize Inrush Current; (10)3mm x 3mm 8-Pin TDFN Package.

Diagrams

MAX1554ETA+T block diagram

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