SMT4214 Expandable Four-Rail Tracking Manager - Summit Microelectronics - (Version JPG) - PDF Catalogue | Technical Documentation

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Battery charger, Power supply controller, Power management controller, Reset circuit, Integrated circuit

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SUMMIT

MICROELECTRONICS, Inc.

_SMT4214

Preliminary Information (See Last Page)

Expandable Four-Rail Tracking Manager

FEATURES & APPLICATIONS

INTRODUCTION

The SMT4214 is a fully integrated programmable voltage manager IC, providing supervisory functions and tracking control for up to four independent power supplies. The four internal managers perform the following functions: Monitor source (bus-side) voltages for under-voltage conditions, monitor back end (cardside) voltages for under-voltage conditions, insure voltage of the card-side tracks within the specified parametric limits, and provides supply status information to a host processor.

The SMT4214 incorporates nonvolatile programmable circuits for setting all of the monitored thresholds for each manager. Individual functions are also programmable allowing interrupts or reset conditions to be generated by user-defined combinations of events.

Programming of configuration and control values by the user can be simplified with the interface adapter (SMX3200) and Windows GUI software obtainable from Summit Microelectronics.

• Programmable Tracking Function

• Programmable Voltage Monitoring of 4 or more Independent Supplies

• Programmable Under-Voltage Thresholds

• Provides Soft Start, Reset, IRQ and Force Shutdown functions

• Minimizes Supply Differential During Power-on and Power-off

• Operates From Any One of Four Supply Voltages

• Easily Expandable to Control up to 32 Supplies

• Packaged in a 28 Lead SSOP

Applications

• Multi-voltage supply rail manager for

• Telecom Infrastructure

• Compact PCI

• Servers

• Multi-voltage Network Processors, DSPs,

ASICs

SIMPLIFIED APPLICATIONS DRAWING

+5.0V

+5.0VO'-

5.0V 3.3V 2.7V

+3.3V

-EÏÏ7

+3.3VI >-+2.7V I >-+2.5VO-

■/r

+2.7V

2.5V

+2.5V

MR# SCL SDA

1.8V

^< U E 1/3 K) E

SMT4214

vrlink link# fs#

link# Slaves

fs# pwr_on# rst#

SMT4214 - Master

ni° f 1

S .ff-,

A pwr_on# Aseated#

RST# Slave

Early GND

irq clr#

IRQ_CLR#

IRQ#

RST# Master

Short Pin GND

Note 1

---1/ —

RST# Slave

+1.8VD-

+1.8V

Power supply and system start-up initialization using multiple SMT4214s. Two power supply channels are set to 'softstart' and three are set to track.

The above drawing illustrates the use of the SMT4214 in a multi-device application. It should be noted this is just an example and the specific component values are purposely not shown. Note 1 - Several pins have internal resistors so external resistors are optional (see the Internal Functional Block Diagram). if external resistors are used they should be tied to VDD_CAP on the Master.

© SUMMIT Microelectronics, Inc. 2004 • 1717 Fox Drive • San Jose CA 95131 • Phone 408 436-9890 • FAX 408 436-9897 The Summit Web Site can be accessed by "right" or "left" mouse clicking on the link: http://www.summitmicro.cor

2061 2.2 09/15/05 1

SMT4214 Expandable Four-Rail Tracking Manager - Summit Microelectronics - #1

Battery charger, Power supply controller, Power management controller, Reset circuit, Integrated circuit