SMB118 Datasheet, PDF (1/37 Pages) Summit Microelectronics, Inc. – Seven-Channel Programmable DC-DC Power Manager with Battery Charger

PLEASE NOTE: The SMB118 has entered End-of-Life.
SMB118/218
Six-Channel Programmable DC-DC Power Managers with Battery Charger
FEATURES & APPLICATIONS
INTRODUCTION
• Digital programming of all major parameters via I²C interface
and non-volatile memory
o Output voltage setpoint/margining
o Sequencing & digital soft start
o Enable/Disable outputs independently
o Input/Output UV/OV voltage thresholds
o PWM/PFM mode
• Six programmable regulator channels with 1.5% accuracy
o Three synchronous step-down (Buck) with
internal PFETs
o One configurable step-up (Boost) or
synchronous step-down (Buck)
o One step-up (Boost)
o One adjustable output voltage LDO
• Programmable Linear Li-Ion Battery Charger
o Precharge/fast charge/termination current
o Fast Charge voltage threshold
o 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
• 1MHz PWM frequency and power-saving automatic 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
• TFT-LCD Displays/Monitors/TVs
SIMPLIFIED APPLICATIONS DRAWING
The SMB118 and SMB218 are highly integrated and flexible six-
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 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, 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 SMB118 and
SMB218 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 SMB118 and SMB218,
this facilitates rapid design cycles and proliferation from a base design
to futures generations of product.
The SMB118 and SMB218 are suited to battery-powered applications
with an input range of +2.7V to +6.0V and provide a very accurate
voltage regulation. Communication is accomplished via the industry
standard I²C 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 48-pad 7mm x 7mm QFN.
+4.5V to +6.0V
DC IN
SMB118/218
Li-Ion
Charger
Step-Up
(Boost)
Channel
Li-Ion Battery
or
+2.7V to +6.0V
I2C/SMBus
Pushbutton Power
Shutdown
RESET Output
HEALTHY Output
System
Control and
Monitoring
LDO
Channel
Step-Up
(Boost) or
Step-Down
(Buck)
Channel
3 Step-
Down
(Buck)
Channels
+0.5V to +35V (Prog.)
+1.5V to +3.75V (Prog.)
+0.5V to +35V (Prog.)
+0.5V to Vin (Prog.)
+0.5V to Vin (Prog.)
+0.5V to Vin (Prog.)
LED Backlight
Drive
MCU/RTC
Memory, I/O
CPU Core
DSP/CODEC
Analog/RF
Figure 1 – Applications block diagram featuring the SMB118/218 six-channel, programmable DC/DC
converters. These integrated power supply and battery managers provide precision regulation, monitoring,
cascade sequencing, output margining and battery charging.
© SUMMIT Microelectronics, Inc. 2008
757 N. Mary Avenue • Sunnyvale CA 94085 • Phone [phone] • FAX [phone]
1
http://www.summitmicro.com/
2107 3.0 10/15/2008