SMB111

Preliminary Information

© SUMMIT Microelectronics, Inc. 2005

1717 Fox Drive • San Jose CA 95131

Phone 408 436-9890 • FAX 408 436-9897

http://www.summitmicro.com/

2100 2.3 5/3/2005

1

Four Channel Programmable DC-DC System Power Manager

INTRODUCTION

interface and non-volatile memory

o

Output voltage set point

o

Output power-up/down sequencing

o

Digital soft-start and output slew rate

o

Input/Battery voltage monitoring

o

UV/OV monitoring of all outputs

o

Enable/Disable outputs independently

• Four output channels

o

Three synchronous step-down (buck)

channels

o

One step-up (boost) channel

• User friendly Graphical User Interface (GUI)

• +2.7V to +6.0V Input range

• Highly accurate 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/LCD Displays/Monitors/TV’s

• Mobile Computing/PDA’s

• Consumer battery-operated equipment

The SMB111 is a highly integrated and flexible four-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 SMB111 integrates all the essential blocks required to

implement a complete four-channel power subsystem including

three synchronous step-down “buck” controllers and one step-

up

“boost”

controller.

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 SMB111

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

SMB111 this facilitates rapid design cycles and proliferation

from a base design to future generations of product.

The SMB111 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

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.

SIMPLIFIED APPLICATIONS DRAWING

FEATURES & APPLICATIONS

Figure 1: Applications schematic featuring the SMB111 four-channel, programmable DC-DC controller

Note: This is an applications example only. Some pins, components and values are not shown.

SMB111

+0.8V to 0.9 x Vin (Prog.) @ 2A

+2.7V to +6.0V

or

Li-Ion

CPU Core

I2C/SMBus

3 Step-

Down

(Buck)

Channels

Step-Up

(Boost)

Channel

System

Control and

Monitoring

Reset Output

Power Good

Reset Input

Vin to +30V (Prog.) @ UP TO 1A

LED Drive

+0.8V to 0.9 x Vin (Prog.) @ 2A

Memory, I/O

+0.8V to 0.9 x Vin (Prog.) @ 2A

DSP/Codec