MAX724, MAX726

5A/2A Step-Down, PWM, Switch-Mode DC-DC Regulators

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Status Explanations for product status codes

Part Number Status Explanation
MAX724 This product is No Longer Available.This product was manufactured for Maxim by an outside wafer foundry using a process that is no longer available. It is not recommended for new designs. For further information, contact us. The data sheet remains available for existing users.

To the best of our knowledge, a second-source replacement for this part is available from Linear Technology. 

MAX726 This product is No Longer Available.This product was manufactured for Maxim by an outside wafer foundry using a process that is no longer available. It is not recommended for new designs. For further information, contact us. The data sheet remains available for existing users.

To the best of our knowledge, a second-source replacement for this part is available from Linear Technology. 

Description

The MAX724/MAX726 are monolithic, bipolar, pulse-width modulation (PWM), switch-mode DC-DC regulators optimized for step-down applications. The MAX724 is rated at 5A, and the MAX726 at 2A. Few external components are needed for standard operation because the power switch, oscillator, and control circuitry are all on-chip. Employing a classic buck topology, these regulators perform high-current step-down functions, but can also be configured as inverters, negative boost converters, or flyback converters.

These regulators have excellent dynamic and transient response characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and short-circuit output faults. The MAX724/MAX726 also have a wide 8V to 40V input range in the buck step-down configuration. In inverting and boost configurations, the input can be as low as 5V.

The MAX724/MAX726 are available in a 5-pin TO-220 package. The devices have a preset 100kHz oscillator frequency and a preset current limit of 6.5A (MAX724) or 2.6A (MAX726).

Data Sheet

Download this datasheet in PDF formatDownload Rev 3 (PDF, 108kB)
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Key Features

  • Input Range: Up to 40V
  • 5A On-Chip Power Switch (MAX724)
    2A On-Chip Power Switch (MAX726)
  • Adjustable Output: 2.5V to 35V
  • 100kHz Switching Frequency
  • Excellent Dynamic Characteristics
  • Few External Components
  • 8.5mA Quiescent Current
  • TO-220 Package
 

Applications/Uses

  • Distributed Power from High-Voltage Buses
  • High-Current Inverter
  • High-Current, High-Voltage Step-Down Applications
  • Isolated DC-DC Conversion
  • Multiple-Output Buck Converter
  • Negative Boost Converter
   

Notes and Comments

5A, Step-Down, PWM, Switch-Mode DC-DC Converter (MAX724)
2A, Step-Down, PWM, Switch-Mode DC-DC Converter (MAX726)

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Document Ref.: 19-0107 Rev 3; 1995-09-01
This page last modified: 2007-05-30