General Description

The MAX608 low-voltage step-up controller operates from a 1.8V to 16.5V input voltage range. Pulse-frequency-modulation (PFM) control provides high efficiency at heavy loads, while using only 85µA (typical) when operating with no load. In addition, a logic-controlled shutdown mode reduces supply current to 2µA typical. The output voltage is factory-set at 5V or can be adjusted from 3V to 16.5V with an external resistor divider.

Features

♦ 1.8V to 16.5V Input Range

♦ 85 Efficiency for 30mA to 1.5A Load Currents

♦ Up to 10W Output Power

♦ 110µA Max Supply Current

♦ 5µA Max Shutdown Current

♦ Preset 5V or Adjustable Output (3V to 16.5V)

♦ Current-Limited PFM Control Scheme

♦ Up to 300kHz Switching Frequency

♦ Evaluation Kit Available

Applications

   High-Efficiency DC-DC Converters

   Battery-Powered Applications

   Positive LCD-Bias Generators

   Portable Communicators