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SMM152 データシート(PDF) 1 Page - Summit Microelectronics, Inc. |
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SMM152 データシート(HTML) 1 Page - Summit Microelectronics, Inc. |
1 / 24 page SMM151/152 © SUMMIT Microelectronics, Inc. 2007 • 757 N. Mary Avenue • Sunnyvale CA 94085 • Phone 408 523-1000 • FAX 408 523-1266 http://www.summitmicro.com/ 2131 3.0 1/20/2010 1 Single-channel Voltage/Current Monitors and Voltage Marginers INTRODUCTION • 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: I 2C Command Input Pins (MUP, MDN) • 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 • Current sensing from 4.0V to 15V 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 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 I 2C bus using an on-chip 10-bit ADC. The margin levels are set using the I 2C serial bus. The devices initiate margining via the I 2C bus or by using the M UP or MDN inputs. Once the pre- programmed margin target voltage is reached, the SMM151/152 hold the converter at this voltage until receiving an I 2C 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 I 2C interface, a host system can communicate with the SMM151/152 status register and utilize 256-bytes of nonvolatile memory. TYPICAL APPLICATION FEATURES & APPLICATIONS VM+ TRIM TRIM VOUT+ SEN+ DC-DC Converter VDD WP A0-A2 COMP1 COMP2 SCL SDA FAULT# CAPM+ MUP MDN I2C Interface Margin Commands V1 2.7V-5.5V SMM151 (SMM152) READY GND VDD_CAP Status Outputs VOUT- SEN- VM- 4.0V-15V VIN CS- CS+ R S VREF CAPM- CAPC (GPIO0) (GPIO1) (GPIO2) (GPIO3) Figure 1 – Application with the SMM151/152 used to Monitor and Margin a DC/DC Converter. Notes: RS must be Kelvin sensed for maximum current sensing accuracy.This is an applications example only. Some components and values are not shown. |
同様の部品番号 - SMM152 |
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同様の説明 - SMM152 |
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