Product Summary

The MAX850ESA+T is a low-noise, inverting, chargepump power supply. The MAX850ESA+T is ideal for biasing GaAsFETs in cellular telephone transmitter amplifiers. The MAX850ESA+T offers both preset (-4.1V) and adjustable (-0.5V to -9.0V) output voltages. Input voltage range for all four devices is 4.5V to 10V. Output current is 5mA. The applications of the MAX850ESA+T include Cellular Phones, Negative Regulated Power Supplies, Personal Communicators, PDAs, Wireless Data Loggers, Continuously Adjustable GaAsFET Bias, LCD-Bias Contrast Control.

Parametrics

MAX850ESA+T absolute maximum ratings: (1)Supply Voltage, VIN to GND: -0.3V to 10.5V; (2)VNEGOUT to GND: -10.5V to 0.3V; (3)VIN to VNEGOUT: -0.3V to 21V; (4)VOUT to GND: VNEGOUT to 0.3V; (5)SHDN or OSC (pin 4) Voltage to GND: -0.3V to (VIN + 0.3V); (6)Continuous Power Dissipation (TA = +70℃), SO: 471mW; (7)Operating Temperature Ranges: -40℃ to +85℃; (8)Storage Temperature Range: -65℃ to +160℃; (9)Lead Temperature (soldering, 10sec): +300℃.

Features

MAX850ESA+T features: (1)Fixed -4.1V or Adjustable -0.5V to -9V Output at 5mA; (2)4.5V to 10V Input Voltage Range; (3)2mVp-p Output Voltage Ripple; (4)100kHz Charge-Pump Switching Frequency; (5)Logic-Level Shutdown Mode: 1μA Max Over Temperature; (6)Low Cost, 8-Pin SO Package.

Diagrams

MAX850ESA+T circuit diagram

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