SMB110
Preliminary Information
Five Channel Programmable DC-DC System Power Manager
FEATURES & APPLICATIONS
•
Digital programming of all major parameters via I
2
C
interface and non-volatile memory
o
Output voltage set point
o
Output power-up/down sequencing
o
Input/Battery voltage monitoring
o
Digital soft-start and output slew rate
o
Output voltage margining
o
UV/OV monitoring of all outputs
o
Enable/Disable outputs independently
•
Five output channels
o
Two synchronous step-down (buck) channels
o
One step-up (boost) channel
o
One inverting (buck-boost) channel
o
One fixed output +3.3V LDO
INTRODUCTION
The SMB110 is a highly integrated and flexible five-channel
power manager 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. Complete with a user friendly GUI, all
programmable settings including output voltages and
input/output voltage monitoring can be customized with ease.
The SMB110 integrates all the essential blocks required to
implement a complete five-channel power subsystem including
two synchronous step-down “buck” controllers, one step-up
“boost” controller, one inverting “buck-boost” controller and one
fixed output +3.3V LDO. Additionally sophisticated power
control/monitoring functions required by complex systems are
built-in. These include digitally programmable output voltage
set point, power-up/down sequencing, enable/disable,
margining and UV/OV/input/output monitoring on all channels.
The integration of features and built-in flexibility of the SMB110
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
SMB110 this facilitates rapid design cycles and proliferation
from a base design to future generations of product.
The SMB110 is suited to battery-powered applications with an
input range of +2.7V to +6.0V. Output voltages are extremely
accurate (<0.5%) employing proprietary ADOC™ technology.
Communication is via the industry standard I
2
C bus. All user-
programmed settings are stored in non-volatile EEPROM of
which 96 bytes may be used for general-purpose memory
applications. The operating temperature range is +0C to +70C
and the available package is a lead-free, Green, RoHS
compliant, 32-pad QFN-32.
•
User friendly Graphical User Interface (GUI)
•
+2.7V to +6.0V Input Range
•
Highly accurate reference and output voltage (<0.5%)
with Active DC Output Control (ADOC™) technology
•
Undervoltage Lockout (UVLO) with hysteresis
•
800 kHz operating frequency
•
96 bytes of user configurable nonvolatile memory
Applications
•
•
•
•
•
•
Digital camcorders/still cameras
Portable DVD/MP3/GPS
Camera/smart phones
TFT Displays/Monitors/TV’s
Mobile Computing/PDA’s
Consumer battery-operated equipment
SIMPLIFIED APPLICATIONS DRAWING
SMB110
+2.7V to +6.0V
or
Li-Ion
LDO
Inverter
Channel
Step-Up
(Boost)
Channels
System
Control and
Monitoring
+3.3V @20mA
MCU/RTC
-0.8V to -30V (Prog.) @UP TO1A
CCD
I2C/SMBus
Vin to +30V (Prog.) @ UP TO 1A
TFT/LCD
Reset Input
Reset Output
Power Good
+0.8V to 0.9 x Vin (Prog.) @ 2A
2 Step-
Down
(Buck)
Channels
Memory, I/O
+0.8V to 0.9 x Vin (Prog.) @ 2A
CPU Core
Figure 1 – Applications diagram featuring the SMB110 five-channel, programmable DC-DC controller
Note: This is an applications example only. Some pins, components and values are not shown.
© SUMMIT
Microelectronics, Inc. 2005
1717 Fox Drive • San Jose CA 95131 •
Phone 408 436-9890 • FAX 408 436-9897
2099 2.3
5/3/2005
1
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
