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1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators

1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-DC Regulators Require Only 10µF Ceramic Capacitor

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.6
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5
IOUT1 (A) (max) 2
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.77
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.6
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5
IOUT1 (A) (max) 2
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.77

Key Features

  • Compact 0.385in² Circuit Footprint
  • 10µF Ceramic Input and Output Capacitors, 2µH Inductor for 1.5A Output
  • Efficiency Up to 94%
  • 1% Output Accuracy Over Load, Line, and Temperature (MAX1951, Up to 1.5A)
  • Guaranteed 2A Output Current
  • Operate from 2.6V to 5.5V Supply
  • Adjustable Output from 0.8V to VIN (MAX1951)
  • Preset Output of 1.8V (1.5% Accuracy) (MAX1952)
  • Internal Digital Soft-Soft
  • Short-Circuit and Thermal-Overload Protection

Applications/Uses

  • ASIC/DSP/µP/FPGA Core and I/O Voltages
  • Cellular Base Stations
  • Networking and Telecommunications
  • Set-Top Boxes

Description

The MAX1951/MAX1952 high-efficiency, DC-to-DC step-down switching regulators deliver up to 2A of output current. The devices operate from an input voltage range of 2.6V to 5.5V and provide an output voltage from 0.8V to VIN, making the MAX1951/MAX1952 ideal for on-board postregulation applications. The MAX1951 total output error is less than 1% over load, line, and temperature.

The MAX1951/MAX1952 operate at a fixed frequency of 1MHz with an efficiency of up to 94%. The high operating frequency minimizes the size of external components. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protection improve design reliability.

The MAX1951 provides an adjustable output from 0.8V to VIN, whereas the MAX1952 has a preset output of 1.8V. Both devices are available in a space-saving 8-pin SO package.

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Simplified Block Diagram

MAX1951, MAX1952: Typical Operating Circuit MAX1951, MAX1952: Typical Operating Circuit Zoom icon

Technical Docs

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.