SUMMIT Microelectronics: Product Summary: SMB122/SMB122X: Eight-Channel Programmable DC-DC Power Managers with Battery Charger

SUMMIT Microelectronics: Product Summary: SMB122/SMB122X

Preliminary Information¹

• A complete index to all Product Summary pages

Download/view the entire SMB122/122X data sheet

Download the SMB122 GUI Programming Software

Download the SMB122X GUI Programming Software

• Summit dongle information

Applications Note 63: Eight-Channel Programmable DC/DC Converter with Battery Charger - Windows GUI Users Guide and Configuration Register Descriptions

Read our press release regarding the SMB122.

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• Also see: SMB118/218 - Six-Channel Programmable DC-DC Power Manager with Battery Charger

FEATURES

• Digital programming of all major parameters via I2C interface and non-volatile memory

• Output voltage setpoint/margining

• Sequencing & digital soft start

• Enable/Disable outputs independently

• Input/Output UV/OV voltage thresholds

• PWM/PFM mode

•
Eight programmable regulator channels with 1.5% accuracy

• Three synchronous step-down (Buck) with internal PFETs

• One configurable step-up (Boost) or synchronous step-down (Buck)

• Two step-up (Boost)

• One configurable step-up (Boost) or inverting step-up/down (Buck-Boost)

• One adjustable output voltage LDO

• Programmable Linear Li-Ion Battery Charger

• Precharge/fast charge/termination current

• Fast Charge voltage threshold

• Float Voltage

• +2.7V to +6.0V Input Range (Higher system voltages supported)

• Built-in current limiting, UV/OV, and thermal protection

• Highly accurate reference and output voltage (<1.5%)

• 1MHz PWM frequency and automatic power saving PFM mode

• 96 bytes of user configurable nonvolatile memory

APPLICATIONS

• Portable Media Players

• Digital camcorders/still cameras

• Smart PDA/Camera phones

• Handheld GPS/PDA's

• Portable Equipment

INTRODUCTION
The SMB122 and SMB122X are highly integrated and flexible eight channel power managers designed for use in a wide range of portable applications. The built-in digital programmability allows system designers to custom tailor the device to suit almost any multi-channel power supply application from digital camcorders to mobile phones.

The SMB122 and SMB122X integrate all the essential blocks required to implement a complete eight-channel power subsystem including three synchronous step-down “Buck” converters, one configurable step-up “Boost” or step-down synchronous “Buck” converter, two step-up (Boost) converters, one configurable step-up “Boost” or inverting step-up/down “Buck-Boost” converter, one linear regulator (LDO) and a fully programmable Li-Ion battery charger.

Additionally sophisticated power control/monitoring functions required by complex systems are built-in. These include digitally programmable output voltage setpoint, power-up/down sequencing, enable/disable, margining, dynamic voltage management, and UV/OV input/output monitoring on all channels. By incorporating a second ENABLE input and 7-level dynamic voltage control, the SMB122X is ideal for powering systems based on Xscale™ and other similar processors.

The integration of features and built-in flexibility of the SMB122 and SMB122X allows the system designer to create a “platform solution” that can be easily modified via software without major hardware changes. Combined with the re-programmability of the SMB122 and SMB122X, this facilitates rapid design cycles and proliferation from a base design to futures generations of product.

The SMB122 and SMB122X are suited to battery-powered applications with an input range of +2.7V to +6.0V and provide a very accurate voltage regulation (<1.5%, typical). Communication is accomplished via the industry standard I 2C bus. All user-programmed settings are stored in non-volatile EEPROM of which 96 bytes may be used for general-purpose memory applications. The commercial operating temperature range is 0C to +70C, the industrial operating range is - 40C to +85C, and the available package is a 64-pad 9mm x 9mm QFN.

Continues in Product Data Sheet

NOTE 1 - This is a Final data sheet that describes a Summit product currently in production.

Revision 3.0 - This document supersedes all previous versions.

SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission.

SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances.

I2C is a trademark of Philips Corporation.
Xscale is a trademark of Marvell Technology Group Ltd.

Copyright©1999- Summit Microelectronics, Inc.