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MAX8716, MAX8717, MAX8756, MAX8757

Interleaved High-Efficiency, Dual Power-Supply Controllers for Notebook Computers

Dual, Step-Down, Interleaved, Fixed-Frequency, Switch-Mode Power-Supply (SMPS) Controllers with Synchronous Rectification for Notebook Computers

Overview

Technical Documents

Ordering Info

Status

Part Number	Status
MAX8716	Active: In Production.
MAX8717	Active: In Production.
MAX8756	This product is No Longer Available.
MAX8757	Active: In Production.

Description

The MAX8716/MAX8717/MAX8756/MAX8757 are dual, step-down, interleaved, fixed-frequency, switch-mode power-supply (SMPS) controllers with synchronous rectification. The MAX8716/MAX8717/MAX8756/MAX8757 are intended for main (5V/3.3V) power generation, while the MAX8756 is optimized for I/O power rails in battery-powered systems.

Fixed-frequency operation with optimal interleaving minimizes input ripple current from the lowest input voltages up to the 26V maximum input. Optimal 40/60 interleaving allows the input voltage to go down to 8.3V before duty-cycle overlap occurs in 5V/3.3V applications, compared to 180° out-of-phase regulators where the duty-cycle overlap occurs when the input drops below 10V.

Accurate output current limit is achieved using a sense resistor. Alternatively, power dissipation can be reduced using lossless inductor current sensing. Independent ON/OFF controls and power-good signals allow flexible power sequencing. Soft-start reduces inrush current, while soft-stop gradually ramps the output voltage down preventing negative voltage dips.

A low-noise mode maintains high light-load efficiency while keeping the switching frequency out of the audible range.

The MAX8716 is available in a 24-pin thin QFN package, and the MAX8717/MAX8756/MAX8757 are available in a 28-pin thin QFN package.

Data Sheet

Download	Rev 2	(PDF, 708kB)
E-Mail

An evaluation kit is available: MAX8717EVKIT MAX8716EVKIT

Key Features

Fixed Switching Frequency
- 200kHz, 300kHz, or 500kHz
- 250kHz, 300kHz, or 400kHz (MAX8756 Only)
No Current-Sense Resistor Required
40/60 Optimal Interleaving
Reduced Input-Capacitor Requirement
Output Voltage Fixed or Adjustable Outputs (Dual Mode™)
- 3.3V/5V Fixed or 1V to 5.5V Adjustable
- 1.5V/1.8V Fixed or 1V to 2.3V Adjustable (MAX8756 Only)
4V to 26V Input Range
Independently Selectable PWM, Skip, and Low-Noise Mode Operation
Soft-Start and Soft-Stop
2V Precision Reference with 0.75% Accuracy
Independent Power-Good Outputs

Applications/Uses

2 to 4 Li+ Cell Battery-Powered Devices
Main or I/O Power Supplies
Notebook and Subnotebook Computers
PDAs and Mobile Communicators

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

MAX8716

4.5

5.5

3.3

Preset

Resistor

300

TQFN/24

16.8

MAX8717

500

TQFN/28

$4.35 @1k

MAX8757

500

TQFN/28

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

Standard Application Circuit

Reliability Reports

Reliability Report:	MAX8717.pdf
Show FIT data for:
Request Reliability Report for:

Software/Models

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Ordering Information

Filters:

Part Number:

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
MAX8716ETG			Active	TQFN;24 pin;16.8 mm² Outline Drawing:21-0139 (PDF) Land Pattern: 90-0022 (PDF) Use pkgcode/variation: T2444-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8716ETG+			Active	TQFN;24 pin;16.8 mm² Outline Drawing:21-0139 (PDF) Land Pattern: 90-0022 (PDF) Use pkgcode/variation: T2444+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8716ETG+T			Active	TQFN;24 pin;16.8 mm² Outline Drawing:21-0139 (PDF) Land Pattern: 90-0022 (PDF) Use pkgcode/variation: T2444+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8716ETG-T			Active	QFN;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8717ETI			Active	TQFN;28 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0026 (PDF) Use pkgcode/variation: T2855-6*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8717ETI+			Active	TQFN;28 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0026 (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8717ETI+T			Active	TQFN;28 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0026 (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8717ETI-T			Active	QFN;28 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8756ETI+		N/A	No Longer Available	TQFN;28 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0026 (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8756ETI+T		N/A	No Longer Available	TQFN;28 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0026 (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8757ETG+			Active	TQFN; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8757ETI+			Active	TQFN;28 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0026 (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8757ETI+T			Active	QFN; Land Pattern: Not Available	-40°C to +85°C	See data sheet

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

MAX8717EVKIT	Evaluation Kit for the MAX8717
MAX8716EVKIT	Evaluation Kit for the MAX8716

Products with Similar Part Numbers

MAX8716EVKIT	Evaluation Kit for the MAX8716
MAX8717EVKIT	Evaluation Kit for the MAX8717

More Information

New Product Press Release

[ 2005-02-22 ]

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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.: 19-3569 Rev 2; 2007-05-11
This page last modified: 2009-09-23