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| SMB122/122X PINOUTS
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SMM122/122X SIMPLIFIED APPLICATIONS DRAWING
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ORDERING INFORMATION
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• Also see: SMB118/218 - Six-Channel Programmable DC-DC Power Manager with Battery Charger
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FEATURES
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Digital programming of all major parameters via I2C interface and non-volatile memory |
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Output voltage setpoint/margining |
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Sequencing
& digital soft
start |
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Enable/Disable outputs independently |
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Input/Output UV/OV voltage thresholds |
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PWM/PFM mode |
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Eight programmable regulator channels with 1.5% accuracy |
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Three
synchronous step-down
(Buck) with internal
PFETs |
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One
configurable step-up
(Boost) or synchronous
step-down (Buck) |
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Two
step-up (Boost) |
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One
configurable step-up
(Boost) or inverting
step-up/down
(Buck-Boost) |
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One
adjustable output
voltage LDO |
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Programmable Linear Li-Ion Battery Charger |
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Precharge/fast charge/termination current |
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Fast
Charge voltage
threshold |
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Float
Voltage |
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+2.7V
to +6.0V Input Range
(Higher system voltages
supported) |
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Built-in
current limiting, UV/OV,
and thermal
protection |
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Highly
accurate reference and
output voltage
(<1.5%) |
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1MHz PWM frequency
and automatic power
saving PFM mode |
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96
bytes of user
configurable nonvolatile
memory |
APPLICATIONS
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Portable Media Players |
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Digital camcorders/still cameras |
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Smart PDA/Camera phones |
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Handheld GPS/PDA's |
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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 stepup (Boost) converters, one configurable step-up “Boost” or inverting step-up/down “Buck-Boost” converter, one 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 XscaleTM and other similar processors.
 Continues in Product Data Sheet
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NOTE 1 - This is a Preliminary Information data sheet that describes a Summit product currently in pre-production with limited characterization
Revision 2.1 - 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.
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Copyright©1999- Summit
Microelectronics,
Inc.
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