Maxim MAX749EPA

LCD 显示器60µA2V ~ 6V

Overview

The MAX749EPA generates negative LCD-bias contrast voltages from 2V to 6V inputs. Full-scale output voltage can be scaled to -100V or greater, and is digitally adjustable in 64 equal steps by an internal digital-to-analog converter (DAC). Only seven small surface-mount components are required to build a complete supply. The output voltage can also be adjusted using a PWM signal or a potentiometer. A unique current-limited control scheme reduces supply current and maximizes efficiency, while a high switching frequency (up to 500kHz) minimizes the size of external components. Quiescent current is only 60μA max and is reduced to under 15μA in shutdown mode. While shut down, the MAX749EPA retains the voltage set point, simplifying software control. The MAX749EPA drives either an external P-channel MOSFET or a PNP transistor.

Features

Bulk Package
Mainly used in LCD Display applications
Operating temperature: -40°C~85°C
SWITCHING CONTROLLER analog IC
ALSO OPERATES IN PFM

Through Hole Mounting Type

Applications

There are a lot of Maxim Integrated
MAX749EPA+Power Management applications.

• Tablet PCs
• Netbooks
• SmartPhones
• Portable Navigation Devices
• Portable Media Players
• Portable Systems
• Hand-Held Systems
• Space satellite point of load supply
• Communications payload
• Optical imaging payload