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• Also see: SMB122 - Nine-Channel Programmable DC-DC Power Manager with Battery Charger |
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SMB118/218 Six-Channel Programmable DC-DC Power Managers with Battery Charger |
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
• Sequencing &
digital soft start
• Enable/Disable
outputs
independently
• Input/Output
UV/OV voltage
thresholds
• PWM/PFM mode,
switching
frequency
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Six
programmable regulator
channels with 1.5%
accuracy
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Three synchronous
step-down (Buck) with
internal PFETs
• One configurable
step-up (Boost) or
synchronous step-down
(Buck)
• One step-up
(Boost)
• One adjustable
output voltage
LDO |
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Programmable
Linear Li-Ion Battery
Charger
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Precharge/fast
charge/termination
current
• Fast Charge
voltage threshold
• 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 |
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1MHz PWM frequencyand power saving automatic PFM mode |
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96
bytes of user
configurable nonvolatile
memory
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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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TFT-LCD
Displays/Monitors/TV's
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INTRODUCTION
The SMB118 and SMB218 are highly integrated and flexible sixchannel 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 SMB118 and SMB218 integrate all the essential blocks required to implement a complete seven-channel power subsystem including three synchronous step-down “Buck” converters, one configurable step-up “Boost” or step-down synchronous “Buck” converter, one step-up “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, powerup/down sequencing, enable/disable, margining and UV/OV input/output monitoring on all channels.
The integration of features and built-in flexibility of the SMB118 and SMB218 allows the system designer to create a “platform solution” that can be easily modified via software without major hardware changes.
 [continued in the PDF]
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NOTE
1 - This is a Preliminary Datasheet that describes a Summit part that is in pre-production with limited characterization.
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.
Revision 2.4 - This document supersedes all previous versions.
I2C is a trademark of Philips Corporation.
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Copyright©1999- Summit
Microelectronics,
Inc.
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