Datasheet LTC3889 (Analog Devices) - 120
| Manufacturer | Analog Devices |
| Description | 60V Dual Output Step-Down Controller with Digital Power System Management |
| Pages / Page | 120 / 120 — TYPICAL APPLICATION. High Efficiency 250kHz 2-Phase 24V Step-Down … |
| File Format / Size | PDF / 2.5 Mb |
| Document Language | English |
TYPICAL APPLICATION. High Efficiency 250kHz 2-Phase 24V Step-Down Converter with Sense Resistors
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LTC3889
TYPICAL APPLICATION High Efficiency 250kHz 2-Phase 24V Step-Down Converter with Sense Resistors
10nF 10nF 1k 0.1µF 1k 2Ω 2mΩ VIN 22µF 48V 10µF 1µF D1 DRV + – D2 CC VIN IIN IIN M1 TG0 TG1 M2 0.1µF 0.1µF L0 L1 7µH BOOST0 BOOST1 4mΩ 7µH 4mΩ SW0 SW1 M3 BG0 BG1 M4 5k LTC3889 SYNC 10k PGOOD0 EXTVCC 12V 10k PGOOD1 VDD25 10k SDA 10k VDD33 SCL 16.2k 16.2k 10k 24.9k 24.9k 10k ALERT VOUT0_CFG 10k 20.5k 20.5k 23.2k 7.32k 9.09k FAULT0 10k FAULT1 VOUT1_CFG 10k SHARE_CLK ASEL0 10k ASEL1 RUN0 FREQ_CFG 10k RUN1 WP PHAS_CFG 30Ω 30Ω I + + SENSE0 ISENSE1 1000pF 1000pF 30Ω 30Ω I – – SENSE0 ISENSE1 V + SENSE0 VSENSE1 V – SENSE0 VOUT TSNS0 TSNS1 24V ITH0 ITH1 30A + 22µF 150µF ITHR0 ITHR1 4× 2× 10nF + VDD33 GND V 10nF DD25 22µF 150µF 4× 2× 6800pF 1µF 1µF 220pF L0, L1: WÜRTH 7443630700 7µH M1, M2: INFINEON BSC034N06NS 3886 TA05 M3, M4: INFINEON BSC034N06NS
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTM4676A Dual 13A or Single 26A Step-Down DC/DC µModule VIN Up to 26.5V; 0.5V ≤ VOUT (±0.5%) ≤ 5.4V, ±2% IOUT Accuracy, Fault Regulator with Digital Power System Management Logging, I2C/PMBus Interface, 16mm × 16mm × 5mm, BGA Package LTM4675 Dual 9A or Single 18A Step-Down DC/DC μModule 4.5V ≤ VIN ≤17V; 0.5V ≤ VOUT ≤ 5.5V, ±0.5% VOUT Accuracy I2C/PMBus Regulator with Digital Power System Management Interface, 11.9mm × 16mm × 3.51mm, BGA Package LTM4677 Dual 18A or Single 36A μModule Regulator with Digital 4.5V ≤ VIN ≤16V; 0.5V ≤ VOUT (±0.5%) ≤ 1.8V, I2C/PMBus Interface, 16mm × Power System Management 16mm × 5.01mm, BGA Package LTC3870/ 60V Dual Output Multiphase Step-Down Slave Controller VIN Up to 60V, 0.5V ≤ VOUT ≤ 14V, Very High Output Current Applications with LTC3870-1 for Current Mode Control Applications with Digital Power Accurate Current Share Between Phases Supporting LTC3880/LTC3880-1, System Management LTC3883/LTC3883-1, LTC3886, LTC3887/LTC3887-1 LTC3884/ Dual Output Multiphase Step-Down Controller with Sub 4.5V ≤ VIN ≤ 38V, 0.5V ≤ VOUT (±0.5%) ≤ 5.5V, I2C/PMBus Interface, LTC3884-1 MilliOhm DCR Sensing Current Mode Control and Digital Programmable Analog Loop Compensation, Input Current Sense Power System Management LTC3887/ Dual Output Multiphase Step-Down DC/DC Controller VIN Up to 24V, 0.5V ≤ VOUT0,1 ≤ 5.5V, Analog Control Loop, I2C/PMBus LTC3887-1 with Digital Power System Management Interface with EEPROM and 16-Bit ADC LTC3882/ Dual Output Multiphase Step-Down DC/DC Voltage Mode VIN Up to 38V, 0.5V ≤ VOUT1,2 ≤ 5.25V, ±0.5% VOUT Accuracy I2C/PMBus LTC3882-1 Controller with Digital Power System Management Interface with EEPROM and 16-Bit ADC LTC3886 60V Dual Output Step-Down Controller with PSM 4.5V < VIN < 60V, 0.5V ≤ VOUT (±0.5%) ≤ 13.8V, Input Current Sense, I2C/PMBus Interface with EEPROM and 16-Bit ADC LTC2977 8-Channel PMBus Power System Manager Featuring Fault Logging to Internal EEPROM Monitors Eight Output Voltages, Input Accurate Output Voltage Measurement Voltage and Die Temperature LTC3815 6A Monolithic Synchronous DC/DC Step-Down Converter 2.25V ≤ VIN ≤ 5.5V, 0.4V ≤ VOUT ≤ 0.72VIN, Programmable VOUT Range ±25% with Digital Power System Management with 0.1% Resolution, Up to 3MHz Operation with 13-Bit ADC LTC3874 Multiphase Step-Down Synchronous Slave Controller 4.5V ≤ VIN ≤ 38V, VOUT up to 5.5V, Very High Output Current, Accurate with Sub MilliOhm DCR Sensing Current Sharing, Current Mode Applications Rev. 0 120 11/18 www.analog.com For more information www.analog.com ANALOG DEVICES, INC. 2018 Document Outline Table of Contents Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Overview Main Control Loop EEPROM CRC Protection Power-Up and Initialization Soft-Start Time-Based Sequencing Event-Based Sequencing Shutdown Light-Load Current Operation PWM Loop Compensation Switching Frequency and Phase Output Voltage Sensing Output Current Sensing Input Current Sensing PolyPhase Load Sharing External/Internal Temperature Sense RCONFIG (Resistor Configuration) Pins Fault Handling Status Registers and ALERT Masking Mapping Faults to FAULT Pins Power Good Pins Serial Interface Communication Protection Device Addressing Responses to VOUT and IOUT Faults Output Overvoltage Fault Response Output Undervoltage Response Peak Output Overcurrent Fault Response Responses to Timing Faults Responses to VIN OV Faults Responses to OT/UT Faults Internal Overtemperature Fault/Warn Response External Overtemperature and Undertemperature Fault Response Responses to External Faults Fault Logging Bus Timeout Protection Similarity Between PMBus, SMBus and I2C 2-Wire Interface PMBus Serial Digital Interface PMBus Command Summary PMBus Commands Applications Information Current Limit Programming ISENSE+ and ISENSE– Pins Low Value Resistor Current Sensing Inductor DCR Current Sensing Slope Compensation and Inductor Peak Current Inductor Value Calculation Inductor Core Selection Power MOSFET and Optional Schottky Diode Selection CIN and COUT Selection Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) DRVCC Regulator Topside MOSFET Driver Supply (CB, DB) Undervoltage Lockout Fault Indications Open-Drain Pins Phase-Locked Loop and Frequency Synchronization Minimum On-Time Considerations External Temperature Sense Derating EEPROM Retention at Temperature Input Current Sense Amplifier External Resistor Configuration Pins (RCONFIG) Voltage Selection Frequency Selection Phase Selection Address Selection Using RCONFIG Efficiency Considerations Programmable Loop Compensation Checking Transient Response PolyPhase Configuration PC Board Layout Checklist PC Board Layout Debugging Design Example Additional Design Checks Connecting the USB to I2C/SMBus/PMBus Adapter to the LTC3889 In System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing PMBus Command Details Addressing and Write Protect General Configuration COMMANDS On/Off/Margin PWM Configuration Voltage Input Voltage and Limits Output Voltage and Limits Output Current and Limits Input Current and Limits Temperature External Temperature Calibration Timing Timing—On Sequence/Ramp Timing—Off Sequence/Ramp Precondition for Restart Fault Response Fault Responses All Faults Fault Responses Input Voltage Fault Responses Output Voltage Fault Responses Output Current Fault Responses IC Temperature Fault Responses External Temperature Fault Sharing Fault Sharing Propagation Fault Sharing Response Scratchpad Identification Fault Warning and Status Telemetry EEPROM Memory Commands Store/Restore Fault Logging Fault Log Operation Block Memory Write/Read Typical Applications Package Description Typical Application Related Parts
TYPICAL APPLICATION High Efficiency 250kHz 2-Phase 24V Step-Down Converter with Sense Resistors
10nF 10nF 1k 0.1µF 1k 2Ω 2mΩ VIN 22µF 48V 10µF 1µF D1 DRV + – D2 CC VIN IIN IIN M1 TG0 TG1 M2 0.1µF 0.1µF L0 L1 7µH BOOST0 BOOST1 4mΩ 7µH 4mΩ SW0 SW1 M3 BG0 BG1 M4 5k LTC3889 SYNC 10k PGOOD0 EXTVCC 12V 10k PGOOD1 VDD25 10k SDA 10k VDD33 SCL 16.2k 16.2k 10k 24.9k 24.9k 10k ALERT VOUT0_CFG 10k 20.5k 20.5k 23.2k 7.32k 9.09k FAULT0 10k FAULT1 VOUT1_CFG 10k SHARE_CLK ASEL0 10k ASEL1 RUN0 FREQ_CFG 10k RUN1 WP PHAS_CFG 30Ω 30Ω I + + SENSE0 ISENSE1 1000pF 1000pF 30Ω 30Ω I – – SENSE0 ISENSE1 V + SENSE0 VSENSE1 V – SENSE0 VOUT TSNS0 TSNS1 24V ITH0 ITH1 30A + 22µF 150µF ITHR0 ITHR1 4× 2× 10nF + VDD33 GND V 10nF DD25 22µF 150µF 4× 2× 6800pF 1µF 1µF 220pF L0, L1: WÜRTH 7443630700 7µH M1, M2: INFINEON BSC034N06NS 3886 TA05 M3, M4: INFINEON BSC034N06NS
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTM4676A Dual 13A or Single 26A Step-Down DC/DC µModule VIN Up to 26.5V; 0.5V ≤ VOUT (±0.5%) ≤ 5.4V, ±2% IOUT Accuracy, Fault Regulator with Digital Power System Management Logging, I2C/PMBus Interface, 16mm × 16mm × 5mm, BGA Package LTM4675 Dual 9A or Single 18A Step-Down DC/DC μModule 4.5V ≤ VIN ≤17V; 0.5V ≤ VOUT ≤ 5.5V, ±0.5% VOUT Accuracy I2C/PMBus Regulator with Digital Power System Management Interface, 11.9mm × 16mm × 3.51mm, BGA Package LTM4677 Dual 18A or Single 36A μModule Regulator with Digital 4.5V ≤ VIN ≤16V; 0.5V ≤ VOUT (±0.5%) ≤ 1.8V, I2C/PMBus Interface, 16mm × Power System Management 16mm × 5.01mm, BGA Package LTC3870/ 60V Dual Output Multiphase Step-Down Slave Controller VIN Up to 60V, 0.5V ≤ VOUT ≤ 14V, Very High Output Current Applications with LTC3870-1 for Current Mode Control Applications with Digital Power Accurate Current Share Between Phases Supporting LTC3880/LTC3880-1, System Management LTC3883/LTC3883-1, LTC3886, LTC3887/LTC3887-1 LTC3884/ Dual Output Multiphase Step-Down Controller with Sub 4.5V ≤ VIN ≤ 38V, 0.5V ≤ VOUT (±0.5%) ≤ 5.5V, I2C/PMBus Interface, LTC3884-1 MilliOhm DCR Sensing Current Mode Control and Digital Programmable Analog Loop Compensation, Input Current Sense Power System Management LTC3887/ Dual Output Multiphase Step-Down DC/DC Controller VIN Up to 24V, 0.5V ≤ VOUT0,1 ≤ 5.5V, Analog Control Loop, I2C/PMBus LTC3887-1 with Digital Power System Management Interface with EEPROM and 16-Bit ADC LTC3882/ Dual Output Multiphase Step-Down DC/DC Voltage Mode VIN Up to 38V, 0.5V ≤ VOUT1,2 ≤ 5.25V, ±0.5% VOUT Accuracy I2C/PMBus LTC3882-1 Controller with Digital Power System Management Interface with EEPROM and 16-Bit ADC LTC3886 60V Dual Output Step-Down Controller with PSM 4.5V < VIN < 60V, 0.5V ≤ VOUT (±0.5%) ≤ 13.8V, Input Current Sense, I2C/PMBus Interface with EEPROM and 16-Bit ADC LTC2977 8-Channel PMBus Power System Manager Featuring Fault Logging to Internal EEPROM Monitors Eight Output Voltages, Input Accurate Output Voltage Measurement Voltage and Die Temperature LTC3815 6A Monolithic Synchronous DC/DC Step-Down Converter 2.25V ≤ VIN ≤ 5.5V, 0.4V ≤ VOUT ≤ 0.72VIN, Programmable VOUT Range ±25% with Digital Power System Management with 0.1% Resolution, Up to 3MHz Operation with 13-Bit ADC LTC3874 Multiphase Step-Down Synchronous Slave Controller 4.5V ≤ VIN ≤ 38V, VOUT up to 5.5V, Very High Output Current, Accurate with Sub MilliOhm DCR Sensing Current Sharing, Current Mode Applications Rev. 0 120 11/18 www.analog.com For more information www.analog.com ANALOG DEVICES, INC. 2018 Document Outline Table of Contents Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Overview Main Control Loop EEPROM CRC Protection Power-Up and Initialization Soft-Start Time-Based Sequencing Event-Based Sequencing Shutdown Light-Load Current Operation PWM Loop Compensation Switching Frequency and Phase Output Voltage Sensing Output Current Sensing Input Current Sensing PolyPhase Load Sharing External/Internal Temperature Sense RCONFIG (Resistor Configuration) Pins Fault Handling Status Registers and ALERT Masking Mapping Faults to FAULT Pins Power Good Pins Serial Interface Communication Protection Device Addressing Responses to VOUT and IOUT Faults Output Overvoltage Fault Response Output Undervoltage Response Peak Output Overcurrent Fault Response Responses to Timing Faults Responses to VIN OV Faults Responses to OT/UT Faults Internal Overtemperature Fault/Warn Response External Overtemperature and Undertemperature Fault Response Responses to External Faults Fault Logging Bus Timeout Protection Similarity Between PMBus, SMBus and I2C 2-Wire Interface PMBus Serial Digital Interface PMBus Command Summary PMBus Commands Applications Information Current Limit Programming ISENSE+ and ISENSE– Pins Low Value Resistor Current Sensing Inductor DCR Current Sensing Slope Compensation and Inductor Peak Current Inductor Value Calculation Inductor Core Selection Power MOSFET and Optional Schottky Diode Selection CIN and COUT Selection Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) DRVCC Regulator Topside MOSFET Driver Supply (CB, DB) Undervoltage Lockout Fault Indications Open-Drain Pins Phase-Locked Loop and Frequency Synchronization Minimum On-Time Considerations External Temperature Sense Derating EEPROM Retention at Temperature Input Current Sense Amplifier External Resistor Configuration Pins (RCONFIG) Voltage Selection Frequency Selection Phase Selection Address Selection Using RCONFIG Efficiency Considerations Programmable Loop Compensation Checking Transient Response PolyPhase Configuration PC Board Layout Checklist PC Board Layout Debugging Design Example Additional Design Checks Connecting the USB to I2C/SMBus/PMBus Adapter to the LTC3889 In System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing PMBus Command Details Addressing and Write Protect General Configuration COMMANDS On/Off/Margin PWM Configuration Voltage Input Voltage and Limits Output Voltage and Limits Output Current and Limits Input Current and Limits Temperature External Temperature Calibration Timing Timing—On Sequence/Ramp Timing—Off Sequence/Ramp Precondition for Restart Fault Response Fault Responses All Faults Fault Responses Input Voltage Fault Responses Output Voltage Fault Responses Output Current Fault Responses IC Temperature Fault Responses External Temperature Fault Sharing Fault Sharing Propagation Fault Sharing Response Scratchpad Identification Fault Warning and Status Telemetry EEPROM Memory Commands Store/Restore Fault Logging Fault Log Operation Block Memory Write/Read Typical Applications Package Description Typical Application Related Parts
