MAX1945R

1MHz, 1% Accurate, 6A Internal Switch Step-Down Regulators

Smallest 6A, 1MHz, 1%-Accurate Internal Switch Step-Down DC-DC

Data Sheet (Rev. 1)
Viewing:

Part Details

  • 6A PWM Step-Down Regulator with 95% Efficiency
  • 1MHz/500kHz Switching for Small External Components
  • 0.76in² Complete 6A Regulator Footprint
  • External Components' Height <3mm
  • ±1% Output Accuracy over Load and Line
  • Operate from 2.6V to 5.5V Supply
  • Operate from 2.5V Input with VCC at 3.3V/5V
  • Preset Output Voltage of 1.8V or 2.5V
  • Adjustable Output from 0.8V to 85% of Input
  • Voltage Margining: ±4% (MAX1945R) or ±9% (MAX1945S)
  • Synchronize to External Clock
  • SYNCOUT Provides 180-Degree Out-of-Phase Clock Output
  • All-Ceramic or Electrolytic Capacitor Designs
MAX1945R
1MHz, 1% Accurate, 6A Internal Switch Step-Down Regulators
MAX1945R, MAX1945S: Typical Operating Circuit
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Learn More
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Hardware Ecosystem

Parts Product Life Cycle Description
Internal Power Switch Buck Regulators 2
MAX1951
PRODUCTION 1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators
MAX1973
PRODUCTION Smallest 1A, 1.4MHz Step-Down Regulators
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Evaluation Kits

MAX1945EVKIT

Evaluation Kit for the MAX1945

Buy Now View Details

Features and Benefits

  • 0.970in x 0.840in Circuit Footprint
  • 2.6V to 5.5V Input Range
  • Output Voltage
    • 1.8V/2.5V Preset
    • 0.8V to 0.85 x VIN Adjustable
  • Provides Up to 6A Output Current
  • ±4% Voltage Margining
  • Internal Power Switch and Synchronous Rectifier
  • 500kHz/1MHz PWM Selectable Switching Frequency
  • SYNC Input: Synchronizes from 400kHz to 1.2MHz TTL/CMOS Clock
  • SYNC Output: Drives 2nd MAX1945 Switching 180 Degrees Out-of-Phase
  • All Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX1945 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains a high-efficiency step-down switching-regulator circuit for applications requiring on-board postregulation. The circuit utilizes a MAX1945R regulator featuring ±4% voltage margining and is configured for a 1.8V output voltage. The circuit provides up to 6A of current. A 2.6V to 5.5V DC source can be utilized to power the circuit's input.

The MAX1945R IC features an internal power MOSFET switch and an internal synchronous rectifier. The MAX1945 EV kit provides connections for the SYNC input. It also provides an output to synchronize another MAX1945 EV kit clock 180 degrees out-of-phase. Pulse-width modulated (PWM) operation at 500kHz allows the use of tiny surface-mount components.

Applications

  • ASIC/CPU/DSP Core Voltages
  • Base Station, Telecom, and Networking
  • Equipment Power Supplies
  • Low-Voltage, High-Density Distributed Power
  • RAM Power Supply
  • Server and Notebook Power Supplies
  • Supplies
MAX1945EVKIT
Evaluation Kit for the MAX1945

Latest Discussions

No discussions on max1945r yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed