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MAX881R

Features: ` Small MAX Package` 1mVp-p Output Voltage Ripple and Noise` Power-OK Signal to Control GaAsFET Drain Switch` 0.05A Logic-Controlled Shutdown` 1ms Guaranteed Start-Up` 2.5V to 5.5V Input` -0.5V to (-VIN + 0.6V) Output at up to 4mA` Operates with One 4.7F and Three 0.22F Capacitors (no in...

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MAX881R: Features: ` Small MAX Package` 1mVp-p Output Voltage Ripple and Noise` Power-OK Signal to Control GaAsFET Drain Switch` 0.05A Logic-Controlled Shutdown` 1ms Guaranteed Start-Up` 2.5V to 5.5V Input` ...

MAX881R Data Sheet

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Part Number:
MAX881R
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Small MAX Package
` 1mVp-p Output Voltage Ripple and Noise
` Power-OK Signal to Control GaAsFET Drain Switch
` 0.05A Logic-Controlled Shutdown
` 1ms Guaranteed Start-Up
` 2.5V to 5.5V Input
` -0.5V to (-VIN + 0.6V) Output at up to 4mA
` Operates with One 4.7F and Three 0.22F Capacitors (no inductors needed)


Application

·Cell Phones
·PCS Phones
·PHS Phones
·Wireless Handsets
·Wireless Modems
·Two-Way Pagers
·Mobile Radios
·Wireless Computers


Pinout

Connection Diagram


Specifications

IN to GND -3V to +6V
SHDN to GND -3V to +6V
POK to GND -0.3V to +12V
C1+ to GND -0.3V to (VIN + 0.3V)
C1-, NEGOUT, OUT, FB to GND -6V to (VIN + 0.3V)
Continuous Power Dissipation (TA = +70)
10-pin MAX (derate 4.1mW/ above +70)		 444mW
Operating Temperature Range -40 to +85
Junction Temperature +150
Storage Temperature Range -65 to +165
Lead Temperature (soldering, 10s) +300

Note 1: The output may be shorted to NEGOUT or GND if the package power dissipation is not exceeded. Typical short-circuit current is 35mA.




Description

The MAX881R low-noise, inverting power supply is designed for biasing GaAsFET power amplifiers in portable wireless applications. This device is a chargepump inverter followed by a negative linear regulator. The input voltage range is 2.5V to 5.5V. The output is preset at -2.0V or can be set, using two resistors, to any voltage from -0.5V to (-VIN + 0.6V). It can deliver up to 4mA. The internal linear regulator MAX881R also filters the output to 1mVp-p ripple and noise.

Other features of MAX881R 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 space-saving 10-pin MAX package.




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