MAX1673

PRODUCTION

Regulated, 125mA Output, Charge Pump DC-DC Inverter

Flexible Control Scheme -Fixed Frequency or Low Quiescent Current Modes

Data Sheet (Rev. 0) Product Selection Table
Viewing:

Overview

  • Regulated Negative Output Voltage (up to -1 x VIN)
  • 125mA Output Current
  • 35µA Quiescent Supply Current (Skip-mode regulation)
  • 350kHz Fixed-Frequency, Low-Noise Output (Linear-mode regulation)
  • 2V to 5.5V Input Range
  • 1µA Logic-Controlled Shutdown

The MAX1673 charge-pump inverter provides a low-cost, compact means of generating a regulated negative output from a positive input at up to 125mA. It requires only three small capacitors, and only two resistors to set its output voltage. The input range is 2V to 5.5V. The regulated output can be set from 0V to -VIN in Skip regulation mode or -1.5V to -VIN in Linear (LIN) regulation mode.

In Skip mode, the MAX1673 regulates by varying its switching frequency as a function of load current. This On-Demand™ switching gives the MAX1673 two advantages: very small capacitors and very low quiescent supply current. At heavy loads, it transfers energy from the input to the output by switching at up to 350kHz. It switches more slowly at light loads, using only 35µA quiescent supply current.

In Linear mode, the MAX1673 switches at a constant 350kHz at all loads and regulates by controlling the current-path resistance. This provides constant-frequency ripple, which is easily filtered for low-noise applications.

This device also features a 1µA logic-controlled shutdown mode and is available in a standard 8-pin SO package. For a device that delivers about 10mA and fits in a smaller package, refer to the MAX868.

Applications

  • Analog Signal Processing
  • Camcorders
  • Digital Still Cameras
  • Hard Disk Drive
  • Measurement Instrumentation
  • Modems
MAX1673
Regulated, 125mA Output, Charge Pump DC-DC Inverter
MAX1673: Typical Operating Circuit
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 2

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts Product Life Cycle Description
Charge Pumps 1
MAX868
PRODUCTION Regulated, Adjustable -2x Inverting Charge Pump
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Latest Discussions

No discussions on MAX1673 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed