SUMMIT Microelectronics: Product Summary: SMM151 & SMM152: Single-channel Voltage/Current Monitors and Voltage Marginers

SUMMIT Microelectronics: Product Summary: SMM151 & SMM152

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GUI Programming Software 151/152Setup.zip

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Application Note 68: Single-channel Current/Voltage Monitors and Voltage Marginers Design Guide and Component Selection

Application Note 69: SMM151/2/3 Single-Channel Supply Voltage Marginers, Voltage/Current Monitors and DC Output Controllers Windows GUI User’s Guide and Configuration Register Descriptions

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September 3, 2008:
DEV-monkey: Use Summit’s Eval Kit to Configure Real-Time Power Monitoring Solution, by DEV-monkey Contributing Writer

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SMM151/152 Simplified APPLICATION DRAWING: Summit Microelectronics, Inc.

SMM151/152 SIMPLIFIED APPLICATIONS DRAWING

SMM151/152 PIN CONFIGURATIONT: Summit Microelectronics, Inc.

SMM151/152 PACKAGE AND PIN CONFIGURATION

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SMM151 & SMM152: Single-channel Voltage/Current Monitors and Voltage Marginers

SMM153 Single-channel Voltage and Current Monitor

FEATURES
	Capable of margining supplies with trim inputs using either positive or negative trim pin control
	Wide Margin range of 0.3V to VDD with internal reference
	Differential Voltage Sensing of the DC-DC converter output voltage
	Supply-side current monitoring (10-bit ADC)
	10-bit ADC readout of supply voltage over I2C bus
	Margining Controlled Via:
	I2C Command
	Input Pins (M_UP, M_DN)
	Two programmable general purpose sensor inputs (COMP1/2) – UV/OV with FAULT Output
	Programmable glitch filters (COMP1/2)
	Programmable internal COMP1/2 VREF: 0.5V or 1.25V
	Operates from 2.7V to 5.5V supply
	Programmable, general purpose I/Os (SMM152)
	General Purpose 256-Byte EEPROM with Write Protect
	I2C 2-wire serial bus for programming configuration and monitoring status
	28-lead 5x5 QFN

APPLICATIONS
	In-system test and control of Point-of-Load (POL)
	Power Supplies for Multi-voltage Processors, DSPs and ASICs
	Routers, Servers, Storage Area Networks

INTRODUCTION

The SMM151/152 are highly accurate power supply voltage/current supervisors and monitors with provisions for voltage margining of the monitored supply. The parts include an internal voltage reference to accurately monitor and margin the supply to within ±1%. The SMM151/152 have the capability to margin over a wide range from 0.3V to VDD using the internal reference and can read the differential voltage of the supply and voltage drop of the current sense resistor over the I2C bus using an on-chip 10-bit ADC. The margin levels are set using the I2C serial bus. The devices initiate margining via the I2C bus or by using the M_UP or M_DN inputs. Once the pre-programmed margin target voltage is reached, the SMM151/152 hold the converter at this voltage until receiving an I2C command or de-asserting the margin input pin. When the SMM151/152 are not margining, the TRIM output pin is held in a high impedance state allowing the converter to operate at its nominal set point.

Two general purpose input pins are provided for sensing under or over-voltage conditions. A programmable glitch filter associated with these inputs allows the user to ignore spurious noise signals. A FAULT# pin is asserted once either input set point is exceeded. The SMM152 also provides four programmable general-purpose inputs/outputs. Using the I2C interface, a host system can communicate with the SMM151/152 status register and utilize 256-bytes of nonvolatile memory.

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ORDERING INFORMATION

NOTE 1 - This is a preliminary Information data sheet that describes a Summit product currently in pre-production with limited characterization.

SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission. SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances.

Revision 2.0 - This document supersedes all previous versions.

I2C is a trademark of Philips Corporation.