Product Summary

The MAX1797EUA+T is a high efficiency step-up DC-DC converter intended for small portable hand-held devices. The device features True-Shutdown circuitry, which fully disconnects the output from the input in shutdown, improves efficiency, and eliminates costly external components. The MAX1797EUA+T also features proprietary LX-damping circuitry for reduced EMI in noise-sensitive applications. For additional in-system flexibility, a battery monitoring comparator (LBI/LBO) remains active even when the DC-DC converter is in shutdown.The applications of the MAX1797EUA+T include Portable Digital Audio Players, PDAs/Palmtops, Wireless Handsets and Portable Terminals.

Parametrics

MAX1797EUA+T absolute maximum ratings: (1)OUT, LX, SHDN, LBI, LBO, BATT to GND: -0.3V to +6V; (2)FB: -0.3V to (VOUT + 0.3V); (3)ILX, IOUT: ±1.5A; (4)Output Short-Circuit Duration: 5s; (5)Continuous Power Dissipation: 330mW; (6)Operating Temperature Range: -40 to +85℃; (7)Junction Temperature: +150℃; (8)Storage Temperature Range: -65 to +150℃; (9)Lead Temperature (soldering, 10s): +300℃.

Features

MAX1797EUA+T features: (1)>95% Efficiency; (2)True-Shutdown Circuitry; (3)Output Disconnects from Input in Shutdown; (4)No External Schottky Diode Needed; (5)25μA Quiescent Supply Current; (6)Low-Noise Antiringing Feature; (7)LBI/LBO Comparator Enabled in Shutdown; (8)2μA Shutdown Current; (9)8-Pin μMAX Package.

Diagrams

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