Datasheet LTM4686, LTM4686-1 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Ultrathin Dual 10A or Single 20A μModule Regulator with Digital Power System Management |
| Pages / Page | 132 / 1 — FEATURES. DESCRIPTION. Dual, Fast, Analog Loops with Digital Interface … |
| Revision | B |
| File Format / Size | PDF / 3.3 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Dual, Fast, Analog Loops with Digital Interface for. Control and Monitoring
Model Line for this Datasheet
Text Version of Document
link to page 26 link to page 26 LTM4686/LTM4686-1 Ultrathin Dual 10A or Single 20A µModule Regulator with Digital Power System Management
FEATURES DESCRIPTION
n
Dual, Fast, Analog Loops with Digital Interface for
The LTM®4686 is a dual 10A (12A Peak) or single 20A
Control and Monitoring
(24A Peak) step-down µModule® (micromodule) DC/ n
Wide Input Voltage Range: 4.5V to 17V Standalone,
DC regulator with 39ms turn-on time. It features remote
2.375V to 17V with Aux 5V Bias (LTM4686-1)
configurability and telemetry-monitoring of power man- n
Output Voltage Range: 0.5V to 3.6V
agement parameters over PMBus—an open standard n
±0.5% Maximum DC Output Error Over Temperature
I2C-based digital interface protocol . The LTM4686 is n
10A DC Typical, 12A Peak Output Current, per Channel
comprised of fast analog control loops, precision mixed- n
±5% Current Readback Accuracy at 10A Load
signal circuitry, EEPROM, power MOSFETs, inductors and n
400kHz PMBus-Compliant I2C Serial Interface
supporting components. The LTM4686 product video is n
Integrated 16-Bit
∆Σ
ADC
available on the website. Click here . n
Supports Telemetry Polling Rates Up to 125Hz
The LTM4686’s 2-wire serial interface enables voltage n
Constant Frequency Current Mode Control
margining and sequencing, and telemetry readback of n
Parallel and Current Share Multiple Modules
currents, voltages, power, temperature, uptime and peak n All 7-Bit Slave Addresses Supported values. Pin-strap resistors configure start-up settings. The n Drop-In Pin-Compatible to Dual 9A LTM4675 and LTpowerPlay™ GUI, DC1613 USB-to-PMBus converter, Dual 13A LTM4676A and Dual 18A LTM4677 DC2086 programming adapter and demo kits are avail- n 16mm × 11.9mm × 1.82mm LGA Package able. Applications running from 5VIN or supplying 5VAUX
Readable Data:
to SVIN should use LTM4686-1. Otherwise, use LTM4686: n Input and Output Voltages, Currents, and Temperatures
MODULE PMBus COMMAND CODE LTM4686 LTM4686-1
n Running Peak Values, Uptime, Faults and Warnings 0x35, VIN_ON (SVIN UVLO-Rising) 5.50V 4.25V n Onboard EEPROM Fault Log Record with ECC 0x36, VIN_OFF (SVIN UVLO-Falling) 5.25V 4.00V
Writable Data and Configurable Parameters:
0x58, VIN_UV_WARN_LIMIT 5.30V 4.09V n Output Voltage, Voltage Sequencing and Margining n Pb-free and RoHS compliant, the LTM4686 is available in Digital Soft-Start/Stop Ramp n a 16mm × 11.9mm × 1.82mm LGA package. OV/UV/OT, UVLO, Frequency and Phasing 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,
APPLICATIONS
7420359, 8163643. Licensed under U.S. Patent 7000125 and other related patents worldwide. n System Optimization in Prototype and Production
Click to view associated Video Design Idea. TYPICAL APPLICATION Using PMBus and LTpowerPlay to Monitor Telemetry and Margin Dual 10A µModule Regulator with Digital VOUT0/VOUT1 During Load Pattern Tests. 10Hz Polling Rate. 3.3VIN Interface for Control and Monitoring* Output Voltage Readback, VOUT Margined 10% Low Input Current Readback
VOUT0, 1.1 1.9 4 6 VIN VIN0 VOUT0 ADJUSTABLE V 2.7V TO 5.5V I V UP TO 10A IN1 + 1.0 OUT1 IN1 22µF V (V) 1.8 OSNS0 ×2 SVIN 100µF (V) (A) 2 (A) 3 LOAD LTM4686-1 0 ×4 0.9 V OUT0 1.7 I IN0 LTC3204B-5, 5VOUT INTVCC V – OSNS0 DC/DC CHARGE-PUMP 0.8 1.6 0 0 0 3 6 9 12 RUN 0 3 6 9 12 ON/OFF CONTROL 0 TIME (s) 46861 TA01b RUN TIME (s) 46861 TA01d 1 VOUT1, V ADJUSTABLE OUT1
Output Current Readback, Varying Load Pattern Power Stage Temperature Readback
CHANNEL 1 TEMP (°C) FAULT INTERRUPTS, GPIO0 UP TO 10A 10 10 60 60 POWER SEQUENCING V GPIO OSNS1 1 100µF I LOAD OUT1 1 PWM CLOCK AND ×4 (A) 57 57 SYNC SGND 5 5 (A) TIME-BASE SHARE_CLK SYNCHRONIZATION I OUT0 54 54 SCL I2C/SMBus I/F WITH SDA REGISTER WRITE PMBus COMMAND SET 0 0 51 51 WP PROTECTION GND ALERT 0 3 6 9 12 CHANNEL 0 TEMP (°C) 0 3 6 9 12 TO/FROM IPMI OR OTHER TIME (s) 46861 TA01c TIME (s) 46861 TA01e 46861 TA01a BOARD MANAGEMENT *FOR COMPLETE CIRCUIT, SEE FIGURE 29 CONTROLLER Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Functional Diagram Test Circuits Operation Power Module Introduction Power Module Configurability and Readback Data Time-Averaged and Peak Readback Data Power Module Overview EEPROM Serial Interface Device Addressing Fault Detection and Handling Responses to VOUT and IOUT Faults Responses to Timing Faults Responses to SVIN OV Faults Responses to OT/UT Faults Responses to External Faults Fault Logging Bus Timeout Protection PMBus Command Summary PMBus Commands Applications Information VIN to VOUT Step-Down Ratios Input Capacitors Output Capacitors Light Load Current Operation Switching Frequency and Phase Minimum On-Time Considerations Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) Undervoltage Lockout Fault Detection and Handling Open-Drain Pins Phase-Locked Loop and Frequency Synchronization RCONFIG Pin-Straps (External Resistor Configuration Pins) Voltage Selection Connecting the USB to the I2C/SMBus/PMBus Controller to the LTM4686 In System LTpowerPlay: An Interactive GUI for Digital Power System Management PMBus Communication and Command Processing Thermal Considerations and Output Current Derating EMI Performance Safety Considerations Layout Checklist/Example Typical Applications Appendix A Similarity Between PMBus, SMBus and I2C 2-Wire Interface Appendix B PMBus Serial Digital Interface Appendix C: PMBus Command Details Addressing and Write Protect General Configuration Registers On/Off/Margin PWM Config Voltage Current Temperature Timing Fault Response Fault Sharing Scratchpad Identification Fault Warning and Status Telemetry NVM (EEPROM) Memory Commands Package Description Package Photographs Package Description Revision History Typical Application Design Resources Related Parts
FEATURES DESCRIPTION
n
Dual, Fast, Analog Loops with Digital Interface for
The LTM®4686 is a dual 10A (12A Peak) or single 20A
Control and Monitoring
(24A Peak) step-down µModule® (micromodule) DC/ n
Wide Input Voltage Range: 4.5V to 17V Standalone,
DC regulator with 39ms turn-on time. It features remote
2.375V to 17V with Aux 5V Bias (LTM4686-1)
configurability and telemetry-monitoring of power man- n
Output Voltage Range: 0.5V to 3.6V
agement parameters over PMBus—an open standard n
±0.5% Maximum DC Output Error Over Temperature
I2C-based digital interface protocol . The LTM4686 is n
10A DC Typical, 12A Peak Output Current, per Channel
comprised of fast analog control loops, precision mixed- n
±5% Current Readback Accuracy at 10A Load
signal circuitry, EEPROM, power MOSFETs, inductors and n
400kHz PMBus-Compliant I2C Serial Interface
supporting components. The LTM4686 product video is n
Integrated 16-Bit
∆Σ
ADC
available on the website. Click here . n
Supports Telemetry Polling Rates Up to 125Hz
The LTM4686’s 2-wire serial interface enables voltage n
Constant Frequency Current Mode Control
margining and sequencing, and telemetry readback of n
Parallel and Current Share Multiple Modules
currents, voltages, power, temperature, uptime and peak n All 7-Bit Slave Addresses Supported values. Pin-strap resistors configure start-up settings. The n Drop-In Pin-Compatible to Dual 9A LTM4675 and LTpowerPlay™ GUI, DC1613 USB-to-PMBus converter, Dual 13A LTM4676A and Dual 18A LTM4677 DC2086 programming adapter and demo kits are avail- n 16mm × 11.9mm × 1.82mm LGA Package able. Applications running from 5VIN or supplying 5VAUX
Readable Data:
to SVIN should use LTM4686-1. Otherwise, use LTM4686: n Input and Output Voltages, Currents, and Temperatures
MODULE PMBus COMMAND CODE LTM4686 LTM4686-1
n Running Peak Values, Uptime, Faults and Warnings 0x35, VIN_ON (SVIN UVLO-Rising) 5.50V 4.25V n Onboard EEPROM Fault Log Record with ECC 0x36, VIN_OFF (SVIN UVLO-Falling) 5.25V 4.00V
Writable Data and Configurable Parameters:
0x58, VIN_UV_WARN_LIMIT 5.30V 4.09V n Output Voltage, Voltage Sequencing and Margining n Pb-free and RoHS compliant, the LTM4686 is available in Digital Soft-Start/Stop Ramp n a 16mm × 11.9mm × 1.82mm LGA package. OV/UV/OT, UVLO, Frequency and Phasing 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,
APPLICATIONS
7420359, 8163643. Licensed under U.S. Patent 7000125 and other related patents worldwide. n System Optimization in Prototype and Production
Click to view associated Video Design Idea. TYPICAL APPLICATION Using PMBus and LTpowerPlay to Monitor Telemetry and Margin Dual 10A µModule Regulator with Digital VOUT0/VOUT1 During Load Pattern Tests. 10Hz Polling Rate. 3.3VIN Interface for Control and Monitoring* Output Voltage Readback, VOUT Margined 10% Low Input Current Readback
VOUT0, 1.1 1.9 4 6 VIN VIN0 VOUT0 ADJUSTABLE V 2.7V TO 5.5V I V UP TO 10A IN1 + 1.0 OUT1 IN1 22µF V (V) 1.8 OSNS0 ×2 SVIN 100µF (V) (A) 2 (A) 3 LOAD LTM4686-1 0 ×4 0.9 V OUT0 1.7 I IN0 LTC3204B-5, 5VOUT INTVCC V – OSNS0 DC/DC CHARGE-PUMP 0.8 1.6 0 0 0 3 6 9 12 RUN 0 3 6 9 12 ON/OFF CONTROL 0 TIME (s) 46861 TA01b RUN TIME (s) 46861 TA01d 1 VOUT1, V ADJUSTABLE OUT1
Output Current Readback, Varying Load Pattern Power Stage Temperature Readback
CHANNEL 1 TEMP (°C) FAULT INTERRUPTS, GPIO0 UP TO 10A 10 10 60 60 POWER SEQUENCING V GPIO OSNS1 1 100µF I LOAD OUT1 1 PWM CLOCK AND ×4 (A) 57 57 SYNC SGND 5 5 (A) TIME-BASE SHARE_CLK SYNCHRONIZATION I OUT0 54 54 SCL I2C/SMBus I/F WITH SDA REGISTER WRITE PMBus COMMAND SET 0 0 51 51 WP PROTECTION GND ALERT 0 3 6 9 12 CHANNEL 0 TEMP (°C) 0 3 6 9 12 TO/FROM IPMI OR OTHER TIME (s) 46861 TA01c TIME (s) 46861 TA01e 46861 TA01a BOARD MANAGEMENT *FOR COMPLETE CIRCUIT, SEE FIGURE 29 CONTROLLER Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Functional Diagram Test Circuits Operation Power Module Introduction Power Module Configurability and Readback Data Time-Averaged and Peak Readback Data Power Module Overview EEPROM Serial Interface Device Addressing Fault Detection and Handling Responses to VOUT and IOUT Faults Responses to Timing Faults Responses to SVIN OV Faults Responses to OT/UT Faults Responses to External Faults Fault Logging Bus Timeout Protection PMBus Command Summary PMBus Commands Applications Information VIN to VOUT Step-Down Ratios Input Capacitors Output Capacitors Light Load Current Operation Switching Frequency and Phase Minimum On-Time Considerations Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) Undervoltage Lockout Fault Detection and Handling Open-Drain Pins Phase-Locked Loop and Frequency Synchronization RCONFIG Pin-Straps (External Resistor Configuration Pins) Voltage Selection Connecting the USB to the I2C/SMBus/PMBus Controller to the LTM4686 In System LTpowerPlay: An Interactive GUI for Digital Power System Management PMBus Communication and Command Processing Thermal Considerations and Output Current Derating EMI Performance Safety Considerations Layout Checklist/Example Typical Applications Appendix A Similarity Between PMBus, SMBus and I2C 2-Wire Interface Appendix B PMBus Serial Digital Interface Appendix C: PMBus Command Details Addressing and Write Protect General Configuration Registers On/Off/Margin PWM Config Voltage Current Temperature Timing Fault Response Fault Sharing Scratchpad Identification Fault Warning and Status Telemetry NVM (EEPROM) Memory Commands Package Description Package Photographs Package Description Revision History Typical Application Design Resources Related Parts
