Datasheet LTC3889 (Analog Devices) - 4

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ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
V + – IN, IIN , IIN .. –0.3V to 65V TOP VIEW CC Top Gate Transient Voltage (TG0, TG1) .. –0.3V to 76V CC + – BOOST0 BG0 V IN I IN I IN DRV EXTV BG1 BOOST0, BOOST1 .. –0.3V to 76V 52 50 48 47 46 44 43 42 Switch Transient Voltage (SW0, SW1) .. –5V to 65V SW0 1 40 BOOST1 DRV TG0 2 39 SW1 CC, BG0, BG1, (BOOST0– SW0), (BOOST1– SW1) ...–0.3V to 11V 38 TG1 ISENSE0+ 4 V + + + + SENSE0 , VSENSE1 , ISENSE0 , ISENSE1 , ISENSE0– 5 36 TSNS1 I – – SENSE0 , ISENSE1 .. –0.3V to 42V TSNS0 6 35 V + SENSE1 V – SENSE0 ... –0.3V to 0.3V VSENSE0+ 7 53 34 PGOOD0 EXTV GND VSENSE0– 8 33 PGOOD1 CC .. –0.3V to 15V (EXTV ISENSE1+ 9 32 ITHR1 CC – VIN) ..13.2V ISENSE1– 10 31 ITH1 RUN, SDA, SCL, ALERT ... –0.3V to 5.5V ITHR0 11 30 VDD33 ASELn, VOUTn_CFG, FREQ_CFG, ITH0 12 29 SHARE_CLK PHAS_CFG, VDD25 .. –0.3V to 2.75V SYNC 13 28 WP (V SCL 14 27 VDD25 IN – IINP), (VIN – IINM), (V 15 16 17 18 19 20 21 22 23 24 25 26 SENSE0+ – ISENSE0+), (V SDA SENSE0+ – ISENSE0–), ALERT RUN0 RUN1 FAULT0 FAULT1 ASEL0 ASEL1 (VSENSE1+ – ISENSE1+), V OUT0_CFG V OUT1_CFG FREQ_CFG PHAS_CFG UKG PACKAGE (VSENSE1+ – ISENSE1–) ... –0.3V to 0.3V VARIATION: UKG52(46) 52-LEAD (7mm × 8mm) PLASTIC QFN PGOOD0, PGOOD1, FAULT, SHARE_CLK, TJMAX = 125°C, θJA = 31°C/W, θJC = 2°C/W I EXPOSED PAD (PIN 53) IS GND, MUST BE SOLDERED TO PCB TH0, ITH1, ITHR0, ITHR1, VDD33, WP, TSNS0, TSNS1, SYNC ... –0.3V to 3.6V Note: Pins omitted to achieve high input voltage rating. DRVCC Peak Output Current ...100mA Operating Junction Temperature Range (Note 2) ... –40°C to 125°C* Storage Temperature Range .. –65°C to 150°C* * See Derating EEPROM Retention at Temperature in the Applications Information section for junction temperatures in excess of 125°C.
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE (SEE NOTE 2)
LTC3889EUKG#PBF LTC3889EUKG#TRPBF LTC3889UKG 52-Lead (7mm × 8mm) Plastic QFN –40°C to 125°C LTC3889IUKG#PBF LTC3889IUKG#TRPBF LTC3889UKG 52-Lead (7mm × 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. Rev. 0 4 For more information www.analog.com 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