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1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC Step-Down Regulator with Enable

1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A, PWM Step-Down DC-DC Regulator Requires 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)
3.05
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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)
3.05

Key Features

  • Compact 0.385in² Circuit Footprint
  • 10µF Ceramic Input and Output Capacitors, 2µH Inductor for 2A Output
  • Efficiency Up to 94%
  • 1.5% Output Accuracy Over Load, Line, and Temperature
  • Guaranteed 2A Output Current
  • Operates from 2.6V to 5.5V Supply
  • Adjustable Output from 0.8V to VIN
  • Internal Digital Soft-Soft
  • Short-Circuit and Thermal-Overload Protection
  • 1MHz Switching Frequency Reduces Component Size
  • Enable Input Audio Shutdown for Reducing Power Consumption
  • Safe Startup into Prebiased Output

Applications/Uses

  • ASIC/DSP/µP/FPGA Core and I/O Voltages
  • Networking and Telecommunications
  • Servers
  • Set-Top Boxes
  • TVs

Description

The MAX1951A high-efficiency, DC-DC step-down switching regulator delivers up to 2A of output current. The device operates from an input voltage range of 2.6V to 5.5V and provides an adjustable output voltage from 0.8V to VIN, making the MAX1951A ideal for on-board postregulation applications. The MAX1951A total output error is less than ±1.5% over load, line, and temperature.

The MAX1951A operates 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 MAX1951A can start up safely with a prebiased or without a preexisting output. This feature simplifies tracking supply designs for core and I/O applications and redundant supply designs.

The MAX1951A is available in an 8-pin SO package and operates over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX1951A: Typical Operating Circuit MAX1951A: 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.