MAX1799 is an integrated circuit containing 5 programmable LDO linear regulators and 2 dedicated open-drain outputs. Each regulator can be individually adjusted from +1.8V to +3.3V. Two open-drain outputs can sink up to 150mA.
The MAX1799 Evaluation System consists of a MAX1799 EV kit and a companion CMAXQUSB interface board. The EV kit is an assembled and tested PCB demonstrating the MAX1799 system power supply, which contains five programmable LDO linear regulators and two open-drain outputs. The CMAXQUSB board allows an IBM-compatible PC to emulate an Intel SMBus 2-wire interface via USB.
This document provides instructions for connecting the hardware, installing the required software, and using the menu-driven interface to adjust regulator voltages and control driver outputs. It also details the hardware configuration, including jumper settings for the SMBus address and power supply connections.
| Regulator Type | Five Low-Noise LDO Linear Regulators |
|---|---|
| Regulator Current | One 300mA Regulator, Four 150mA Regulators |
| Dropout Voltage | 100mV (max) at 2/3 Rated Current |
| Output Voltage Range | +1.8V to +3.3V |
| Open-Drain Output Current | 150mA |
| Interface Compatibility | I2C/SMBus Compatible |
| Board Dimensions | 2.4in x 3.4in |
You need a DC power supply (+2.5V to +5.5V at 1A), the MAX1799 EV system, the CMAXQUSB interface board, a voltmeter, and a Windows 98SE/2000/XP PC with a spare USB port.
Yes, jumpers JU4 and JU5 connect VIN4/5 and VIN2/3 to VIN1, allowing all three inputs to be powered from a single power supply.