Datasheet LTC3888-1 (Analog Devices) - 5

link to page 45 LTC3888-1
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
VIN Supply Voltage ... –0.3V to 40V TOP VIEW V + SENSEn , DAOUTn .. –0.3V to 4.2V V – I SENSE3 I SENSE4 PWM4 PWM5 I SENSE5 I SENSE6 PWM6 PWM7 I SENSE7 SENSEn ... –0.3V to 0.3V 52 51 50 49 48 47 46 45 44 ISENSEn, VFBn ... –0.3V to 3.6V PWM3 1 43 ISENSE1 TSNSn, VDR_MON ... –0.3V to 6.0V PWM2 2 42 PWM1 I SYNC, FAULTn, PGOODn, CLKOUT, SENSE2 3 41 VSENSE1– ISENSE0 4 40 VSENSE1+ SHARE_CLK .. –0.3V to 3.6V PWM0 5 39 TSNS1 SCL, SDA, RUNn, ALERT ... –0.3V to 5.5V VSENSE0– 6 38 ITH1 VSENSE0+ 7 37 ITHR1 INTVCC ...(Note 4) TSNS0/VDR_MON 8 53 36 DAOUT1 V GND ITHO 9 35 V DD33 ... (Note 5) FB1 IREF, PWMn ... (Note 6) ITHRO 10 34 PGOOD1 DAOUT0 11 33 IREF VDD25, ITHn, ITHRn, RSET, ASELn, VFB0 12 32 VIN ILIMn_CFG, PWM_CFG ..(Note 7) PGOOD0/CLKOUT 13 31 INTVCC SYNC 14 30 V Operating Junction Temperature Range DD33 SCL 15 29 SHARE_CLK (Notes 2, 3) .. –40°C to 125°C* SDA 16 28 VDD25 Storage Temperature Range .. –65°C to 150°C* ALERT 17 27 PWM_CFG 18 19 20 21 22 23 24 25 26 T0 T1 *See Derating EEPROM Retention at Temperature in the FAUL FAUL RUN0 RUN1 R SET ASEL0 ASEL1 ILIM0_CFG ILIM1_CFG Applications Information section for junction tempera- UHG PACKAGE tures in excess of 125°C. 52-LEAD (5mm × 8mm) PLASTIC QFN TJMAX = 125°C, θJA = 36°C/W, θJC = 3.8°C/W EXPOSED PAD (PIN 53) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3888EUHG-1#PBF LTC3888EUHG-1#TRPBF 38881 52-Lead (5mm × 8mm) Plastic QFN –40°C to 125°C LTC3888IUHG-1#PBF LTC3888IUHG-1#TRPBF 38881 52-Lead (5mm × 8mm) Plastic QFN –40°C to 125°C
AUTOMOTIVE PRODUCTS**
LTC3888IUHG-1#WPBF LTC3888IUHG-1#WTRPBF 38881 52-Lead (5mm × 8mm) Plastic QFN –40°C to 125°C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
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Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models. Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Operation Overview About This Document Major Product Features Main Control Loop Power-Up and Initialization Testing Integrity of Output Voltage Sense Analog Output Voltage Control PMBus Output Voltage Control Soft-Start Time-Based Output Sequencing Output Ramping Control Voltage-Based Output Sequencing Output Disable Minimum Output Disable Times Output Short Cycle Switching Frequency and Phase PolyPhase Load Sharing Voltage Control Loop Compensation Load Step Emulation Input Supply Monitoring Output Voltage Sensing and Monitoring Output Current Sensing and Monitoring Temperature Sense Resistor Configuration Pins Internal EEPROM with CRC Fault Detection Input Supply Faults Hardwired PWM Response to Power Stage Faults Hardwired PWM Response to Power Stage UV Hardwired PWM Response to VOUT Faults Power Good Indication Hardwired PWM Response to IOUT Faults Hardwired PWM Response to Internal Temperature Faults External Temperature Faults Timing Faults External Faults Higher-Level Fault Handling Status Registers and ALERT Masking FAULT Pin I/O Fault Log Operation Fault Log Details Factory Default Operation Serial Interface Serial Bus Addressing Serial Bus Timeout Serial Communication Errors PMBus Command Summary PMBus Commands Data Formats Applications Information Efficiency Considerations Power Stage Selection and Interface Using The VDR Monitor Unused TSNS Inputs PWM Frequency and Inductor Selection CIN Selection COUT Selection Programmable Loop Compensation PCB Layout Considerations Output Voltage Sensing Classical Analog Output Voltage Control PMBus Output Voltage Control Using Output Voltage Servo Soft-Start and Stop Time-Based Output Sequencing and Ramping Voltage-Based Output Sequencing PWM Frequency Synchronization PolyPhase Operation and Load Sharing Resistor Configuration Pins Internal Regulator Outputs IC Junction Temperature Derating EEPROM Retention at Temperature Configuring Open-Drain Pins PMBus Communication and Command Processing Status and Fault Log Management LTpowerPlay – An Interactive Digital Power GUI Interfacing to the DC1613 Design Example PMBus Command Details Addressing and Write Protect PAGE PAGE_PLUS_WRITE PAGE_PLUS_READ WRITE_PROTECT MFR_ADDRESS MFR_RAIL_ADDRESS General Device Configuration PMBUS_REVISION CAPABILITY MFR_CONFIG_ALL On, Off and Margin Control ON_OFF_CONFIG OPERATION MFR_RESET PWM Configuration FREQUENCY_SWITCH MFR_CHAN_CONFIG MFR_PWM_CONFIG_LTC3888-1 MFR_PWM_MODE_LTC3888-1 MFR_PWM_COMP Input Voltage and Limits VIN_ON VIN_OFF VIN_OV_FAULT_LIMIT VIN_UV_WARN_LIMIT Output Voltage and Limits VOUT_MODE VOUT_COMMAND VOUT_MAX MFR_VOUT_MAX VOUT_MARGIN_HIGH VOUT_MARGIN_LOW VOUT_SCALE_LOOP VOUT_OV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_UV_FAULT_LIMIT Output Current and Limits IOUT_CAL_GAIN MFR_LOAD_EMULATION MFR_LOAD_EMULATION IOUT_OC_FAULT_LIMIT IOUT_OC_WARN_LIMIT Output Timing, Delays, and Ramping MFR_RESTART_DELAY TON_DELAY TON_MAX_FAULT_LIMIT VOUT_TRANSITION_RATE TOFF_DELAY TOFF_MAX_WARN_LIMIT External Temperature and Limits MFR_TEMP_1_GAIN MFR_TEMP_1_OFFSET OT_FAULT_LIMIT OT_WARN_LIMIT Status Reporting STATUS_BYTE STATUS_WORD STATUS_VOUT STATUS_IOUT STATUS_INPUT STATUS_TEMPERATURE STATUS_CML STATUS_MFR_SPECIFIC MFR_PADS_LTC3888-1 MFR_COMMON MFR_INFO CLEAR_FAULTS Telemetry READ_VIN MFR_VIN_PEAK READ_VOUT MFR_VOUT_PEAK READ_IOUT MFR_IOUT_PEAK MFR_TOTAL_IOUT MFR_READ_ALL_IOUT READ_TEMPERATURE_1 MFR_TEMPERATURE_1_PEAK READ_TEMPERATURE_2 MFR_TEMPERATURE_2_PEAK READ_FREQUENCY MFR_CLEAR_PEAKS Fault Response and Communication VIN_OV_FAULT_RESPONSE VOUT_OV_FAULT_RESPONSE VOUT_UV_FAULT_RESPONSE IOUT_OC_FAULT_RESPONSE OT_FAULT_RESPONSE MFR_OT_FAULT_RESPONSE TON_MAX_FAULT_RESPONSE MFR_RETRY_DELAY SMBALERT_MASK MFR_FAULT_PROPAGATE MFR_FAULT_RESPONSE MFR_FAULT_LOG MFR_FAULT_LOG_CLEAR EEPROM User Access STORE_USER_ALL RESTORE_USER_ALL MFR_COMPARE_USER_ALL MFR_FAULT_LOG_STORE MFR_EE_xxxx USER_DATA_0x Unit Identification MFR_ID IC_DEVICE_ID MFR_SPECIAL_ID Package Description Typical Applications Related Parts