Maxim > Products > Power and Battery Management > MAX1966, MAX1967

MAX1966, MAX1967

Low-Cost Voltage-Mode PWM Step-Down Controllers

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1966/MAX1967 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers that are ideal for a variety of cost-sensitive applications. They drive low-cost N-MOSFETs for both the high-side switch and synchronous rectifier and require no external Schottky power diode or current-sense resistor. Short- circuit and current-limit protection is provided by sensing the drain-to-source voltage on the low-side FET. Both devices can supply outputs as low as 0.8V and are well suited for DSP cores and other low-voltage logic.

The MAX1966 has an input range of 2.7V to 5.5V while the MAX1967 has an input range of 2.7V to 28V. In ultra-low-cost designs, the MAX1966/MAX1967 can provide efficiency exceeding 90% and can achieve 95% efficiency with optimized component selection.

The MAX1966/MAX1967 operate at 100kHz and ac-commodate aluminum electrolytic capacitors and powdered-iron core magnetics in minimum-cost designs. They also provide excellent performance with high-performance surface-mount components. The MAX1966 is available in a low-cost 8-pin SO package. The MAX1967 is available in a 10-pin µMAX package.

Data Sheet

Download	Rev 1	(PDF, 412kB)
E-Mail

An evaluation kit is available: MAX1966EVKIT

Key Features

Cost-Optimized Design
No Schottky Diode or Current-Sense Resistor Required
>95% Efficiency
Low-Cost External Components
All N-Channel FET Design
2.7V to 5.5V Input Range (MAX1966)
2.7V to 28V Input Range (MAX1967)
0.8V Feedback for Low-Voltage Outputs
100kHz Switching Frequency Accommodates Low-Cost Components
Thermal Shutdown
Output Current-Limit and Short-Circuit Protection

Applications/Uses

Cable Modems and Routers
Graphic Card Supplies
Networking Power Supplies
Set-Top Boxes
Telecom Power Supplies
Termination Supplies
xDSL Modems and Routers

Key Specifications:

Step-Down Switching Regulators

Part Number

V_IN
(V)

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

MAX1966

2.7

5.5

0.8

4.5

Resistor

100

30.9

MAX1967

15.4

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

Application Notes

Application Note 1153

Simple Circuit Boosts a 3V Input and Improves Efficiency

Reliability Reports

Reliability Report:	MAX1966.pdf MAX1967.pdf
Show FIT data for:

Software/Models

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Ordering Information

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Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1966ESA			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1966ESA+			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1966ESA+T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1966ESA-T			Active	N.SO;8 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1967EUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1967EUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1967EUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1967EUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Evaluation Kits

MAX1966EVKIT

Evaluation Kit for the MAX1966 and MAX1967

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