MAX1951

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


Please check latest availability status for a specific part variant.

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.

Learn More About PowerMind™
MAX1951, MAX1952: Typical Operating Circuit MAX1951, MAX1952: Typical Operating Circuit Enlarge+

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
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX1951 2.65.50.85-Resistor2InternalYes11000
SOIC (N)/8
$2.44 @1k
MAX1952 1.81.81.8
SOIC (N)/8
See All Step-Down Switching Regulators (389)
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.


MAX1951EVKIT: Evaluation Kit for the MAX1951, MAX1952

Technical Documents

Tutorial 5133 Power-Supply Solutions for Altera FPGAs
Tutorial 5132 Power-Supply Solutions for Xilinx FPGAs

Quality and Environmental Data

Product Reliability Reports: MAX1951.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

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