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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 288kB) Download   E-Mail

Description

The MAX783 is a system-engineered power-supply controller for notebook computers or similar battery-powered equipment. It provides two high-performance step-down (buck) pulse-width modulators (PWMs) for +3.3V/+5V and dual PCMCIA VPP outputs powered by an integral flyback winding controller. Other functions include dual, low-dropout, micropower linear regulators for CMOS/RTC back up, and two precision low-battery-detection comparators. High efficiency (95% at 2A, greater than 80% at loads from 5mA to 3A) is achieved through synchronous rectification and PWM operation at heavy loads, and Idle-Mode™ operation at light loads. The MAX783 uses physically small components, thanks to high operating frequencies (300kHz/200kHz) and a new current-mode PWM architecture that allows for output filter capacitors as small as 30µF per ampere of load. Line- and load-transient responses are terrific, with a high 60kHz unity-gain crossover frequency that allows output transients to be corrected within four or five clock cycles. Low system cost is achieved through a high level of integration and the use of low-cost external N-channel MOSFETs. The integral flyback winding controller provides a low-cost, +15V high-side output that regulates even in the absence of a load on the main output. Other features include low-noise, fixed-frequency PWM operation at moderate to heavy loads and a synchronizable oscillator for noise-sensitive applications such as electromagnetic pen-based systems and communicating computers. The MAX783 is similar to the MAX782, except the flyback winding is on the 3.3V inductor instead of the 5V inductor, the VPP outputs can be optionally programmed to 3.3V, and the device may be completely shut down.

Key Features		Applications/Uses
Dual PWM Buck Controllers (+3.3V and +5V) Dual PCMCIA VPP Outputs (0V/3.3V/5V/12V) Two Precision Comparators or Level Translators Power-Ready Status Output (RDY5-bar) 95% Efficiency Optimized for 6-Cell Applications 420µA Quiescent Current 70µA in Standby (linear regulators alive) 25µA Shutdown Current 5.5V to 30V Input Range Small SSOP Package Fixed Output Voltages Available: 3.3V (standard) 3.45V (High-Speed Pentium™) 3.6V (PowerPC™)		Communication Systems Notebook Computers Pen-Entry Systems Portable Data Terminals

Design Guides

Microprocessor Supervisory (PDF)

Reliability Reports

none

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: 1-9 of 9

MAX783	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX783EBX+T			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX783EBX+			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX783CBX			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX783CBX-T			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX783SCBX			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX783EBX			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX783EBX-T			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX783SEBX			Active	SSOP;36 pin;163.4 mm² Outline Drawing: 21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX783EVKIT	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX783EVKIT-SO			Active	Land Pattern: Not Available		See data sheet

Notes and Comments

Fixed Output Voltages Available 3.3V, 3.45V, 3.6V

Related Products

MAX782, MAX782R, MAX782S Triple-Output Power Supply Controller for Notebook Computers MAX786, MAX786R, MAX786S Dual-Output Power Supply Controller for Notebook Computers

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