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MAX1951, MAX1952

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

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

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 V_IN, 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 V_IN, 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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Data Sheet

Download	Rev 2	(PDF, 380kB)
E-Mail

An evaluation kit is available: MAX1951EVKIT

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 V_IN (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

Key Specifications:

Step-Down Switching Regulators

Part Number

V_IN
(V)

V_OUT
(V)

Preset V_OUT
(V)

Max. I_OUT
(A)

Output Adjust. Method

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

min

max

≥

≤

max w/pins

See Notes

MAX1951

2.6

5.5

0.8

Resistor

1000

SOIC(N)/8

$1.84 @1k

MAX1952

1.8

SOIC(N)/8

$1.84 @1k

See All Step-Down Switching Regulators (284)

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 prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

More Information

New Product Press Release

[ 2002-11-26 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-2622 Rev 2; 2010-02-12
This page last modified: 2010-02-12