SMB119 Datasheet, PDF (1/34 Pages) Summit Microelectronics, Inc. – Seven-Channel Programmable DC-DC Power Manager

SMB119
Seven-Channel Programmable DC-DC Power Manager
FEATURES & APPLICATIONS
• 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
• Seven programmable regulator channels with 1.5% accuracy
o Three synchronous step-down (buck) with internal
PFETs
o Two step-up (boost)
o One configurable step-up (boost) or step-down (buck)
o One adjustable output voltage LDO
• +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
• Space-saving 7x7 QFN-48 package
Applications
• Portable Media Players
• Digital camcorders/still cameras
• Smart PDA/Camera phones
• Handheld GPS/PDAs
• Portable Equipment
INTRODUCTION
The SMB119 is a highly integrated and flexible seven-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.
The SMB119 integrates 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, two step-up
(boost) converters, and one linear regulator (LDO).
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 SMB119 is ideal for powering
systems based on Xscale™ and other similar processors.
The integration of features and built-in flexibility of the SMB119 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 SMB119, this facilitates rapid design
cycles and proliferation from a base design to futures generations of
product.
The SMB119 is suited to battery-powered applications with an input
range of +2.7V to +6.0V and provides a very accurate voltage
regulation (<1.5%). 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.
SIMPLIFIED APPLICATIONS DRAWING
+2.7V to +6.0V
DC IN
I²C/SMBus
System Enable
Pushbutton Power
Shutdown
Control Inputs
Status Outputs
SMB119
LDO
2 Step-Up
Channels
+1.5V to +3.75V
Vin to +35V (Prog.)
Vin to +35V (Prog.)
Step-Up or
Step-Down
Channel
+0.5V to +35V (Prog.)
System
Control
and
Monitoring
3 Step-
Down
Channels
+0.5V to Vin (Prog.)
+0.5V to Vin (Prog.)
+0.5V to Vin (Prog.)
MCU/RTC
LED
Backlight
TFT-LCD
Bias
Memory, I/O
CPU Core
DSP/CODEC
Analog/RF
Figure 1 – Applications block diagram featuring the SMB119 seven-channel, programmable DC/DC converter. This integrated power
supply provides precision regulation, monitoring, cascade sequencing, and dynamic output voltage management.
© SUMMIT Microelectronics, Inc. 2006 757 North Mary Avenue • Sunnyvale CA 94085 • Phone [phone] • FAX [phone]
1
http://www.summitmicro.com/
2126 3.0 10/8/2008