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LTC3880 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3880 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 136 page  LTM4676A 1 4676afa For more information www.linear.com/LTM4676A Typical applicaTion FeaTures DescripTion Dual 13A or Single 26A µModule Regulator with Digital Power System Management The LTM®4676A is a dual 13A or single 26A step-down µModule® (micromodule) DC/DC regulator with 40ms turn-on time. It features remote configurability and telemetry-monitoring of power management parameters overPMBus—anopenstandardI2C-baseddigitalinterface protocol . The LTM4676A is comprised of fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components. The LTM4676A’s 2-wire serial interface allows outputs to be margined, tuned and ramped up and down at program- mable slew rates with sequencing delay times. Input and outputcurrentsandvoltages,outputpower,temperatures, uptime and peak values are readable. 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 LTM4676A is pin-compatible and the improved performance version of the LTM4676. applicaTions n Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring n Wide Input Voltage Range: 4.5V to 26.5V n Output Voltage Range: 0.5V to 5.5V n ±0.5% Maximum DC Output Error Over Temperature n ±2.5% Current Readback Accuracy at 10A Load n 400kHz PMBus-Compliant I2C Serial Interface n Integrated 16-Bit ∆Σ ADC n Supports Telemetry Polling Rates Up to 125Hz n Constant Frequency Current Mode Control n Parallel and Current Share Multiple Modules n All 7-Bit Slave Addresses Supported n Pin-Compatible to Dual 18A LTM4677 n 16mm × 16mm × 5.01mm 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 with ECC Writable Data and Configurable Parameters: n Output Voltage, Voltage Sequencing and Margining n Digital Soft-Start/Stop Ramp n OV/UV/OT, UVLO, Frequency and Phasing n System Optimization, Characterization and Data Min- ing in Prototype, Production and Field Environments L , LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered trademarks and LTpowerPlay is a trademark of Analog Devices, Inc. All other 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. Dual 13A µModule Regulator with Digital Interface for Control and Monitoring* Using PMBus and LTpowerPlay to Monitor Telemetry and Margin VOUT0/VOUT1 During Load Pattern Tests. 10Hz Polling Rate. 12VIN 22µF ×3 ON/OFF CONTROL FAULT INTERRUPTS, POWER SEQUENCING PWM CLOCK AND TIME-BASE SYNCHRONIZATION VIN 5.75V TO 26.5V VOSNS0– VOUT0, ADJUSTABLE UP TO 13A 100µF ×7 VOSNS0+ VOUT0 VIN0 VIN1 SVIN LOAD0 VOUT1, ADJUSTABLE UP TO 13A 100µF ×7 I2C/SMBus I/F WITH PMBus COMMAND SET TO/FROM IPMI OR OTHER BOARD MANAGEMENT CONTROLLER LOAD1 RUN0 RUN1 WP *FOR COMPLETE CIRCUIT, SEE FIGURE 69 LTM4676A GND 4676A TA01a SGND SCL SDA ALERT VOSNS1 VOUT1 GPIO0 GPIO1 REGISTER WRITE PROTECTION SYNC SHARE_CLK 1.1 1.0 0.9 0.8 1.9 1.8 1.7 1.6 0 3 6 TIME (SEC) Output Voltage Readback, VOUT Margined 7.5% Low 4676A TA01b 9 12 15 10 5 0 15 10 5 0 0 3 6 TIME (SEC) Output Current Readback, Varying Load Pattern 4676A TA01c 9 12 1.5 1.0 0.5 0 2.4 1.6 0.8 0 0 3 6 TIME (SEC) Input Current Readback 4676A TA01d 9 12 60 57 54 51 60 57 54 51 0 3 6 TIME (SEC) Power Stage Temperature Readback 4676A TA01e 9 12 Click to view associated Video Design Idea. |
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