MAX8831 Description
The MAX8831 integrates a 60mA, 28V PWM DC-DC step-up converter with five low-dropout LED current regulators for display and keypad backlighting in cell phones, PDAs, and other portable devices. The IC provides up to 90% efficiency over the entire input voltage range of 2.7V to 5.5V. The step-up converter operates at a fixed 2MHz switching frequency, enabling the use of very small external ponents to achieve a pact...
MAX8831 Key Features
- 28V Step-Up DC-DC Converter Integrated NMOS Power Switch > 90% Efficiency Fixed 2MHz Switching Pulse Skipping for Improv
- I2C Programmable (0x9A Write/0x9B Read), patible with 1.8V Logic
- Two 25mA Regulators for Display Backlighting I2C-Programmable Output Current (50µA to 25.25mA) 128-Step Logarithmic Dimm
- Three 5mA Current Regulators for Keypad Lighting I2C-Programmable Output Current (50µA to 5.0mA) 32-Step Logarithmic Dim
- Open/Short LED and Open-Circuit Diode Detection
- Thermal-Shutdown and Output Overvoltage Protection
- Ultra-Low 0.1mA Shutdown Current
- Tiny 2mm x 2mm, 16-Bump WLP Package