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MAX34441ETL+T Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX34441ETL+T Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 53 page _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller 19-5488; Rev 0; 8/10 +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. Ordering Information General Description The MAX34441 is a complex system monitor that can man- age up to five power supplies and a fan. The power-supply manager monitors the power-supply output voltage and constantly checks for user-programmable overvoltage and undervoltage thresholds. It can also margin the power- supply output voltage up or down to a user-programma- ble level. The margining is performed in a closed-loop arrangement whereby the device automatically adjusts a pulse-width-modulated (PWM) output and then mea- sures the resultant output voltage. The power-supply manager can also sequence the supplies in any order at both power-up and power-down. With the addition of an external current-sense amplifier, the device can also monitor currents. The device also contains closed-loop fan-speed control. Based on user-programmable settings for fan-control PWM duty cycles or RPM speeds at particular tempera- ture breakpoints, the device automatically adjusts the fan speed in a manner to reduce audible noise and power consumption. Applications Network Switches/Routers Base Stations Servers Smart Grid Network Systems Industrial Controls Features S 5 Channels of Power-Supply Management Voltage Measurement/Monitoring Differential 12-Bit 1% Accurate ADC Min/Max Threshold Excursion Detection Supports Current Monitoring with External Current-Sense Amplifier Automatic Closed-Loop Margining Programmable Up and Down Sequencing Power-Good Output S 1 Channel of Fan Control Supports 3-Wire and 4-Wire Fans Automatic Closed-Loop Fan-Speed Control Support for Dual Tachometer Fans Fan-Fault Detection S Supports Up to Six Temperature Sensors External Thermal Diode Interface with Automatic Series Resistance Cancellation One Internal Temperature Sensor Support for Up to Four Additional I2C Digital Temp Sensor ICs Fault Detection on All Temp Sensors S PMBus™-Compliant Command Interface S I2C/SMBus™-Compatible Serial Bus with Bus Timeout Function S On-Board Nonvolatile Fault Logging and Default Configuration Setting S No External Clocking Required S +3.3V Supply Voltage PMBus is a trademark of SMIF, Inc. SMBus is a trademark of Intel Corp. PART TEMP RANGE PIN-PACKAGE MAX34441ETL+ -40NC to +85NC 40 TQFN-EP* MAX34441ETL+T -40NC to +85NC 40 TQFN-EP* Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata. |
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