MAX1951A

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


Please check latest availability status for a specific part variant.

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.
MAX1951A: Typical Operating Circuit MAX1951A: Typical Operating Circuit Enlarge+

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

See parametric specs for Step-Down Switching Regulators (409)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
Switch Type
minmaxminmaxmax
MAX1951A 2.65.50.852Internal

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Request Reliability Report for: MAX1951A 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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