The MAX850-MAX853 low-noise, inverting, charge-pump power supplies are ideal for biasing GaAsFETs in cellular telephone transmitter amplifiers.
The MAX850-MAX852 offer both preset (-4.1V) and adjustable (-0.5V to -9.0V) output voltages. The MAX853 uses an external positive control voltage to set the negative output voltage. Input voltage range for all four devices is 4.5V to 10V. Output current is 5mA.
An internal linear regulator reduces the output voltage ripple to 2mVP-P. With a well-filtered control voltage (VCTRL), the MAX853 achieves typical output ripple of less than 1mVP-P. Supply current is 3mA max, and shutdown current is less than 1µA max over temperature
(5µA max for MAX851).
Key Features
Applications/Uses
Fixed -4.1V or Adjustable -0.5V to -9V Output at 5mA
4.5V to 10V Input Voltage Range
2mVP-P Output Voltage Ripple (MAX850-MAX852)
1mVP-P Output Voltage Ripple (MAX853)
100kHz Charge-Pump Switching Frequency (MAX850/MAX851/MAX853)
External Synchronizing Clock Input (MAX852)
Logic-Level Shutdown Mode: 1µA Max Over Temperature (MAX850/MAX852/MAX853)
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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