MAX843 Datasheet - Maxim

MAX843, GaAsFET Bias

19-0388; Rev 1; 3/96 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO Low-Noise, Regulated, -2V GaAsFET Bias _______________General .
The MAX840/MAX843/MAX844 low-noise, inverting charge-pump power supplies are ideal for biasing GaAsFETs in cellular telephone transmitter amplifiers.

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Datasheet Details

Part number:

MAX843

Manufacturer:

Maxim

File Size:

240.48 KB

Description:

GaAsFET Bias

Features

* o Fixed -2V or Adjustable -0.5V to -9.4V Output at 4mA (MAX840) o 2.5V to 10V Input Voltage Range o Operate with Small Capacitors (as low as 0.22µF) o 1mVp-p Output Voltage Ripple o Charge-Pump Switching Frequency: 100kHz in Normal Operation 20kHz in Shutdown Mode (MAX844) o 1µA Max Logic-Level Shut

Applications

* Cellular Phones GaAsFET Power Amplifier Modules Personal Communicators, PDAs Wireless Data Loggers Continuously Adjustable GaAsFET Bias LCD-Bias Contrast Control Regulated Negative Power Supplies __________Typical Operating Circuit VIN = 2.5V to 10.0V (3 CELLS)
* Dice are specified at TA = +25

MAX843 Distributors

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MAX843 GaAsFET Bias Maxim

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