MAX850
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MAX850

Low-Noise, Regulated, Negative Charge Pump Power Supplies for GaAsFET Bias

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1mVP-P Output Voltage Ripple (MAX853)

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $2.25
Features
  • 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)
  • Low Cost, 8-Pin SO Package
Additional Details
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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).

Applications

  • Cell Phones
  • Continuously Adjustable GaAsFET Bias
  • LCD-Bias Contrast Control
  • Negative Regulated Power Supplies
  • Personal Communicators, PDAs
  • Wireless Data Loggers
Part Models 4
1ku List Price Starting From $2.25

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX850ESA+
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MAX850ESA+T
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MAX850ISA+
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Product Lifecycle

PCN

Oct 30, 2020

- 1702R2

ASSEMBLY

MAX850ESA+

PRODUCTION

MAX850ESA+T

PRODUCTION

MAX850ISA+

PRODUCTION

MAX850ISA+T

PRODUCTION

Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Oct 30, 2020

- 1702R2

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ASSEMBLY

MAX850ESA+

PRODUCTION

MAX850ESA+T

PRODUCTION

MAX850ISA+

PRODUCTION

MAX850ISA+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX850EVKIT

Evaluation Kit for the MAX850, MAX851, MAX852, MAX853

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MAX850EVKIT

Evaluation Kit for the MAX850, MAX851, MAX852, MAX853

Evaluation Kit for the MAX850, MAX851, MAX852, MAX853

Features and Benefits

  • 4.5V to 10V Input Range
  • -4.1V Regulated Output
  • Less than 2mVp-p Output Voltage Ripple
  • 5mA Output Current
  • Surface-Mount Technology

Product Detail

The MAX850-MAX853 ICs are inverting, charge-pump DC-DC converters with low-noise, regulated outputs. Their low output ripple voltage makes these devices ideal for biasing the GaAs FETs commonly found in cellular telephone transmitters.

The MAX850 evaluation kit (EV kit) is a fully assembled and tested surface-mount board. The board is shipped with a MAX850 mounted, but it can be replaced by the MAX851, MAX852, or MAX853. Provisions are made for mounting two additional resistors, which are required for output voltages other than -4.1V. A special scope-probe socket is also mounted on the board, so output noise can be observed on an oscilloscope.

Applications

  • Cell Phones
  • Continuously Adjustable GaAsFET Bias
  • LCD-Bias Contrast Control
  • Negative Regulated Power Supplies
  • Personal Communicators, PDAs
  • Wireless Data Loggers

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