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MAX1776

24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1776 high-efficiency step-down converter provides an adjustable output voltage from 1.25V to V_IN from supply voltages as high as 24V. An internal current-limited 0.4Ω MOSFET delivers load currents up to 600mA. Operation to 100% duty cycle minimizes dropout voltage (240mV at 600mA).

The MAX1776 has a low 15µA quiescent current to improve light-load efficiency and conserve battery life. The device draws only 3µA while in shutdown.

High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. The MAX1776 is available in an 8-pin µMAX package, which uses half the space of an 8-pin SO. For increased output drive capability, use the MAX1626/ MAX1627 step-down controllers, which drive an external P-channel MOSFET to deliver up to 20W.

Data Sheet

Download	Rev 2	(PDF, 752kB)
E-Mail

An evaluation kit is available: MAX1776EVKIT

Key Features

Fixed 5V or Adjustable Output
4.5V to 24V Input Voltage Range
Up to 600mA Output Current
Internal 0.4Ω P-Channel MOSFET
Efficiency Over 95%
15µA Quiescent Supply Current
3µA Shutdown Current
100% Maximum Duty Cycle for Low Dropout
Current-Limited Architecture
Thermal Shutdown
Small 8-µMAX Package

Applications/Uses

Distributed Power Systems
Handheld Devices
Keep-Alive Supplies
Notebook Computers

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

MAX1776

4.5

1.25

0.6

Preset

Resistor

200

µMAX/8

15.6

$3.20 @1k

See All Step-Down Switching Regulators (288)

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

[ 2001-05-22 ]

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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.: 19-1975 Rev 2; 2003-07-22
This page last modified: 2009-10-15