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Power Switching Regulator - Switching Regulators MAX1744
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MAX1744

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High-Voltage, Step-Down DC-DC Controller in µMAX

High-Voltage (36V) Step-Down DC-DC Controller in µMAX

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Product Details

See parametric specs for Supervisors (1 Monitored Voltage)
See parametric specs for Step-Down Switching Regulators

Key Features

See parametric specs for Step-Down Switching Regulators
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 36
VOUT1 (V) (min) 3.3
VOUT1 (V) (max) 5
IOUT1 (A) (max) 10
Switch Type External
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 330
Package/Pins UMAX/10
Budgetary
Price (See Notes) 		3.37
See parametric specs for Step-Down Switching Regulators
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Simplified Block Diagram

Technical Docs

Data Sheet High-Voltage, Step-Down DC-DC Controller in µMAX Feb 10, 2010
App Note Turn-On Switching Loss of An Asynchronous Buck Converter

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 36
VOUT1 (V) (min) 3.3
VOUT1 (V) (max) 5
IOUT1 (A) (max) 10
Switch Type External
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 330
Package/Pins UMAX/10
Budgetary
Price (See Notes) 		3.37
See parametric specs for Step-Down Switching Regulators

Key Features

  • High-Voltage Operation (up to 36VIN)
  • Efficiency > 90%
  • Output Power Capability Exceeds 50W
  • 10-Pin µMax Package
  • Low-Dropout Voltage
  • 100% (max) Duty Cycle
  • 90µA Quiescent Current
  • 4µA Shutdown Current
  • Up to 330kHz Switching Frequency
  • Output Voltage
    • 5V or 3.3V (MAX1744)
    • Adjustable 1.25V to 18V (MAX1745)
  • Current-Limited Control Scheme

Applications/Uses

  • Automotive Electronics
  • FireWire®/IEEE® 1394
  • Industrial Control Systems
  • Telecom Systems
  • Wall-Cube-Powered Devices

Description

The MAX1744/MAX1745 are step-down DC-DC controllers capable of handling up to 36V inputs. These parts use a proprietary current-limited control scheme for excellent light- and full-load efficiency, while their 330kHz (max) switching frequency permits small external components for space-critical applications. Operation to 100% duty cycle permits the lowest possible dropout voltage.

The MAX1744 contains an internal feedback network that provides a pin-selectable output voltage of either 3.3V or 5V. The MAX1745 uses an external feedback network to generate an adjustable output voltage between 1.25V and 18V.

The MAX1744/MAX1745 are available in a space-saving 10-pin µMAX® package.

Simplified Block Diagram

MAX1744, MAX1745: Typical Operating Circuit MAX1744, MAX1745: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet High-Voltage, Step-Down DC-DC Controller in µMAX Feb 10, 2010
App Note Turn-On Switching Loss of An Asynchronous Buck Converter

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.