Update: 28 September, 2023
The MAX881R is a low-noise, inverting power supply designed for biasing GaAsFET power amplifiers in portable wireless applications. It has an input voltage range of 2.5V to 5.5V and the output is preset at -2.0V or can be set to any voltage from -0.5V to (-VIN + 0.6V) using two resistors. It can deliver up to 4mA of current. The internal linear regulator also filters the output to 1mVp-p ripple and noise. Other features include a power-OK (POK) output that signals when the negative voltage is within 7.5% of its set point. It protects the GaAsFET by not allowing power to be applied to the GaAsFET’s drain until it is properly biased. The signal can be routed either to a microcontroller or directly to a switch at the GaAsFET drain. The MAX881R is available in a 10-pin µMAX package.
File format: PDF
Size: -
MD5 Checksum: 58C47BAC0C8E27CC3A3CE3BAF6B442A1
Publication date: 10 April, 2012
Downloads: -
PDF Link: MAXIM MAX881R handbook PDF