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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 420kB) Download   E-Mail

Description

The MAX796/MAX797/MAX799 high-performance, step-down DC-DC converters with single or dual outputs provide main CPU power in battery-powered systems. These buck controllers achieve 96% efficiency by using synchronous rectification and Maxim's proprietary Idle Mode™ control scheme to extend battery life at full-load (up to 10A) and no-load outputs. Excellent dynamic response corrects output transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Unique bootstrap circuitry drives inexpensive N-channel MOSFETs, reducing system cost and eliminating the crowbar switching currents found in some PMOS/NMOS switch designs. The MAX796/MAX799 are specially equipped with a secondary feedback input (SECFB) for transformer-based dual-output applications. This secondary feedback path improves cross-regulation of positive (MAX796) or negative (MAX799) auxiliary outputs. The MAX797 has a logic-controlled and synchronizable fixed-frequency pulse-width-modulating (PWM) operating mode, which reduces noise and RF interference in sensitive mobile-communications and pen-entry applications. The SKIP-bar override input allows automatic switchover to idle-mode operation (for high-efficiency pulse skipping) at light loads, or forces fixed-frequency mode for lowest noise at all loads. The MAX796/MAX797/MAX799 are all available in 16-pin DIP and narrow SO packages. See the table below to compare these three converters.

An evaluation kit is available:  MAX796EVKIT   MAX797EVKIT  

Key Features		Applications/Uses
96% Efficiency 4.5V to 30V Input Range 2.5V to 6V Adjustable Output Preset 3.3V and 5V Outputs (at up to 10A) Multiple Regulated Outputs +5V Linear-Regulator Output Precision 2.505V Reference Output Automatic Bootstrap Circuit 150kHz/300kHz Fixed-Frequency PWM Operation Programmable Soft-Start 375µA Typ Quiescent Current (VIN = 12V, VOUT = 5V) 1µA Typ Shutdown Current		Cell Phones Notebook and Subnotebook Computers PDAs and Mobile Communicators

Diagram

Typical Operating Circuits

Application Notes

Application Note 851: Battery Charger Delivers 2.5A With >96% Efficiency - MAX797 Application Note 930: Synchronous Buck-Regulator Output Terminates High-Speed Data Buses - MAX797

Evaluation Kits

MAX796EVKIT MAX797EVKIT

Reliability Reports

Reliability Report: MAX796.pdf MAX797.pdf MAX799.pdf Show FIT data for: MAX796 MAX797 MAX799

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: 1-34 of 34

MAX796	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX796MJE			Active	CDIP(N);16 pin;173.5 mm² Outline Drawing: 21-0045 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: J16-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX796C/D			Active	DICE SALES;NA pin;0 mm² Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX796CPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX796EPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX796CSE			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX796CSE-T			Active	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX796ESE			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX796ESE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX796ESE+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX796ESE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX797	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX797MJE			Active	CDIP(N);16 pin;173.5 mm² Outline Drawing: 21-0045 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: J16-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX797C/D			Active	DICE SALES;NA pin;0 mm² Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX797CPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX797EPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX797CSE			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX797CSE-T			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX797CSE+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX797CSE+T			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX797ESE			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX797ESE-T			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX797ESE+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX797ESE+T			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX799	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX799MJE			Active	CDIP(N);16 pin;173.5 mm² Outline Drawing: 21-0045 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: J16-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX799C/D			Active	DICE SALES;NA pin;0 mm² Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX799CPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX799EPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX799CSE+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX799CSE+T			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX799CSE			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX799CSE-T			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX799ESE			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX799ESE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX799ESE+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX799ESE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet

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