SMB113

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/

2102 2.3 5/3/2005

1

INTRODUCTION

Figure 1 – Applications schematic featuring the SMB113 four-channel, programmable DC-DC controller.

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

SMB113

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

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

+2.7V to +6.0V

or

Li-Ion

CPU Core

Analog/RF

I2C/SMBus

4 Step-

Down

(Buck)

Channels

System

Control and

Monitoring

Power Good

Enable Input

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

Memory, I/O

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

DSP/Codec

• Digital programming of all major parameters via

I

o

Output voltage set point

o

Input/Battery voltage monitoring

o

Output power-up/down sequencing

o

Digital soft-start and output slew rate

o

Output voltage margining

o

UV/OV monitoring of all outputs

o

Enable/Disable outputs

independently

• User friendly Graphical User Interface (GUI)

• Four synchronous step-down (buck) output

channels

• +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

• Mobile Computing/PDA’s

•

Consumer battery-operated equipment

The SMB113 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 SMB113 integrates all the essential blocks required to

implement

a

complete

four-channel

power

subsystem

consisting of four synchronous step-down “buck” controllers.

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 SMB113

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

SMB113 this facilitates rapid design cycles and proliferation

from a base design to future generations of product.

The SMB113 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

Four Channel Programmable DC-DC System Power Manager