The MAX608EPA 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. The MAX608EPA is ideal for two- and three-cell battery-powered systems. An operating frequency of up to 300kHz allows use with small surface-mount components. The MAX608EPA operates in "bootstrapped" mode only (with the chip supply, OUT, connected to the DC-DC output). For a 12V output without external resistors, or for nonbootstrapped applications (chip supply connected to input voltage), refer to the pin-compatible MAX1771. The MAX608EPA is available in 8-pin DIP and SO packages.
Feature
- 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
- Battery-Powered Applications
- High-Efficiency DC-DC Converters
- Portable Communicators
- Positive LCD-Bias Generators