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Data Sheet

FULL DATA SHEET (PDF, 708kB) Download   E-Mail

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.

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

Evaluation Kits

MAX8717EVKIT MAX8716EVKIT

Reliability Reports

Show FIT data for: MAX8716 MAX8717 MAX8756 MAX8757 Request Reliability Report for: MAX8716 MAX8717 MAX8756 MAX8757

Software/Models

none

Ordering Information
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. More: SeeFull Data Sheet or Part 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.
Devices: 1-13 of 13
MAX8716	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8716ETG+T			THIN QFN;24 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T2444+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8716ETG+			THIN QFN;24 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T2444+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8716ETG			THIN QFN;24 pin;17 mm² Dwg: 21-0139H (PDF) Use pkgcode/variation: T2444-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8716ETG-T				-40°C to +85°C	See data sheet
MAX8717	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8717ETI-T				-40°C to +85°C	See data sheet
MAX8717ETI+T			THIN QFN;28 pin;26 mm² Dwg: 21-0140L (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8717ETI+			THIN QFN;28 pin;26 mm² Dwg: 21-0140L (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8717ETI			THIN QFN;28 pin;26 mm² Dwg: 21-0140L (PDF) Use pkgcode/variation: T2855-6*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8756	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8756ETI+			THIN QFN;28 pin;26 mm² Dwg: 21-0140L (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8756ETI+T			THIN QFN;28 pin;26 mm² Dwg: 21-0140L (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8757	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8757ETG+				-40°C to +85°C	See data sheet
MAX8757ETI+			THIN QFN;28 pin;26 mm² Dwg: 21-0140L (PDF) Use pkgcode/variation: T2855+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8757ETI+T				-40°C to +85°C	See data sheet

More Information

New Product Press Release 2005-02-22

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