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LTM4686 Datasheet(PDF) 1 Page - Analog Devices |
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LTM4686 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 132 page  LTM4681 1 Rev. 0 For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION Quad 31.25A or Single 125A µModule Regulator with Digital Power System Management The LTM®4681 is a quad 31.25A or single 125A step- down µModule® (power module) DC/DC regulator fea- turing remote configurability and telemetry-monitoring of power management parameters over PMBus. The LTM4681 is comprised of digitally programmable analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components. The LTM4681’s 2-wire serial interface allows outputs to be margined, tuned and ramped up and down at pro- grammable slew rates with sequencing delay times. True input current sense, output currents and voltages, output power, temperatures, uptime and peak values are read- able. Custom configuration of the EEPROM contents is not required. At start-up, output voltages, switching frequency, and channel phase angle assignments can be set by pin- strapping resistors. The LTpowerPlay® GUI and DC1613 USB-to-PMBus converter and demo kits are available. The LTM4681 is offered in a 15mm × 22mm × 8.17mm BGA package available with SnPb or RoHS compliant terminal finish. APPLICATIONS n Quad Digitally Adjustable Analog Loops with Digital Interface for Control and Monitoring n Wide Input Voltage Range: 4.5V to 16V n Output Voltage Range: 0.5V to 3.3V n ±0.5% Maximum DC Output Error Over Temperature n ±4% Current Readback Accuracy: 0°C to 125°C n Integrated Input Current Sense Amplifier n 400kHz PMBus-Compliant I2C Serial Interface n Supports Telemetry Polling Rates Up to 125Hz n Integrated 16-Bit ∆Σ ADC n Parallel and Current Share Multiple Modules n 15mm × 22mm × 8.17mm BGA Package Readable Data: n Input and Output Voltages, Currents, and Temperatures n Running Peak Values, Uptime, Faults and Warnings n Onboard EEPROM Fault Log Record Writable Data and Configurable Parameters: n Output Voltage, Voltage Sequencing and Margining n Digital Soft-Start/Stop Ramp, Program Analog Loop n OV/UV/OT, UVLO, Frequency and Phasing n Multi-Rail Processor Power, Configurable Core Power All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258, 7420359, 8163643. Licensed under U.S. Patent 7000125 and other related patents worldwide. Quad 31.25A µModule Regulator with Digital Interface for Control and Monitoring Channel Efficiency vs Load Current POWER GOOD MONITORS FAULT INTERRUPTS ON/OFF CONTROL 4.5V TO 16V 4.5V TO 16V CBULK 22µF ×6 22µF ×6 LOAD 1.5V AT 31.25A CBULK LOAD 1.2V AT 31.25A CBULK LOAD 1V AT 31.25A CBULK LOAD 0.9V AT 31.25A CER CER CER CER 4681 TA01a PGOOD0,1,2,3 FAULT0,1,2,3 RUN0,1,2,3 RUNP VIN_VBIAS SVIN_23 VIN23 IN_23– IN_23+ SVIN_01 VIN01 IN_01– IN_01+ VOSNS3– VOSNS3+ VOUT3 VOSNS2– VOSNS2+ VOUT2 VOSNS1– VOSNS1+ VOUT1 VOSNS0– VOSNS0+ VOUT0 LTM4681 I2C/SMBus I/F WITH PMBus COMMAND SET TO/FROM IPMI OR OTHER BOARD MANAGEMENT CONTROLLER SYNCHRONIZATION TIME BASE REGISTER WRITE PROTECTION FOR COMPLETE CIRCUIT SEE FIGURE 48 (FROM 4.5V TO 5.5V CONNECT VIN, SVIN, AND INTVCC TOGETHER) + + + + RSENSE1 RSENSE2 OUTPUT CURRENT (A) 0 95 86 94 92 90 88 93 91 89 87 85 25 15 4681 TA01b 35 20 10 30 5 12VIN, 0.9VOUT, 250kHz 12VIN, 1.0VOUT, 250kHz 12VIN, 1.2VOUT, 350kHz 12VIN, 1.5VOUT, 425kHz Configurable Output Array 31.25A 31.25A 31.25A 31.25A 62.5A 31.25A 31.25A 93.75A 31.25A 62.5A 62.5A 125A |
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