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MAX848 - 1-Cell to 3-Cell / High-Power / Low-Noise / Step-Up DC-DC Converters

Description

The MAX848/MAX849 boost converters set a new standard of high efficiency and high integration for noisesensitive power-supply applications, such as portable phones and small systems with RF data links.

The heart of the these devices is a synchronous boost-topology regulator that generates a fixed 3.

Features

  • o Up to 95% Efficiency (see Typical Output Selector Guide below) o 3.3V Dual Mode™ or 2.7V to 5.5V Adj. Output o 0.7V to 5.5V Input Range o 0.15mW Standby Mode o 300kHz PWM Mode or Synchronizable o Two-Channel ADC with Serial Output o Power-Good Function MAX848/MAX849.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1095; Rev 2; 12/97 1-Cell to 3-Cell, High-Power, Low-Noise, Step-Up DC-DC Converters General Description The MAX848/MAX849 boost converters set a new standard of high efficiency and high integration for noisesensitive power-supply applications, such as portable phones and small systems with RF data links. The heart of the these devices is a synchronous boost-topology regulator that generates a fixed 3.3V output (or 2.7V to 5.5V adjustable output) from one to three NiCd/NiMH cells or one Li-Ion cell. Synchronous rectification provides a 5% efficiency improvement over similar nonsynchronous boost regulators. In standby mode, pulse-skipping PFM operation keeps the output voltage alive with only 150µW quiescent power consumption.
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