Overview
Features and Benefits
- +0.9V to +4.5V Input Range
- High-Power Output: 4.5V or Adjustable
- Dual Outputs: Step-up and Linear Regulator
- 200mA Max Linear-Regulator Output Current
- Optional Track Mode for Highest Efficiency
- Low-Noise, 3.3V or Adjustable Output Voltage
- High-Efficiency Step-up Converter: up to 96%
- Up to 850mA Total Output Current
- Internal 300kHz Oscillator
- Internal MOSFET and Synchronous Rectifier
- 1µA Shutdown Current
- Power-Good Output
- Surface-Mount Components
- Fully Assembled and Tested
Product Details
The MAX1705 evaluation kit (EV kit) is a step-up switching regulator for battery-powered systems operating from 1 to 3 NiCd/NiMH cells or 1 Li-Ion cell. The EV kit accepts a +0.9V to +4.5V input and converts it to a 4.5V step-up output and a 3.3V linear-regulator output. It provides low quiescent current, high-efficiency pulse-frequency-modulation operation for maximum battery life, and a high-power, fixed-frequency pulse-width-modulation mode. The MAX1705 features a built-in, low-dropout linear post-regulator that reduces high-frequency ripple.
The MAX1705 EV kit is a fully assembled and tested surface-mount circuit board. It can also be used to evaluate the MAX1706.
Applications
- Digital Cordless Phones
- Handheld Instruments (PDAs, Palmtops)
- Palmtop Computers
- PCS Phones
- Personal Communicators
- Two-Way Paging
- Wireless Handsets