Datasheet LTC3883, LTC3883-1 (Analog Devices) - 5

LTC3883/LTC3883-1
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE AUTOMOTIVE PRODUCTS**
LTC3883EUH#WPBF LTC3883EUH#WTRPBF 3883 32-Lead (5mm × 5mm) Plastic QFN –40°C to 105°C LTC3883IUH#WPBF LTC3883IUH#WTRPBF 3883 32-Lead (5mm × 5mm) Plastic QFN –40°C to 125°C LTC3883EUH-1#WPBF LTC3883EUH-1#WTRPBF 38831 32-Lead (5mm × 5mm) Plastic QFN –40°C to 105°C LTC3883IUH-1#WPBF LTC3883IUH-1#WTRPBF 38831 32-Lead (5mm × 5mm) 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.
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN = 12V, VRUN = 3.3V, fSYNC = 500kHz (externally driven) unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage
VIN Input Voltage Range (Note 12) l 4.5 24 V IQ Input Voltage Supply Current (Note 14) Normal Operation VRUN = 3.3V, No Caps on TG and BG 30 mA VRUN = 0V 20 mA VUVLO Undervoltage Lockout Threshold VINTVCC/VEXTVCC Falling 3.7 V when VIN > 4.2V VINTVCC/VEXTVCC Rising 3.95 V TINT Initialization Time from VIN Applied Until the MFR_CONFIG_ALL Bit 4 = 0 80 ms TON_DELAY Timer Starts MFR_CONFIG_ALL Bit 4 = 1 35 ms
Control Loop
VOUTR0 Full-Scale Voltage Range 0 VOUT_COMMAND = 5.500V (Note 9) l 5.422 5.576 V Set Point Accuracy (0.6V to 5V) l –0.5 0.5 % Resolution 12 Bits LSB Step Size 1.375 mV VOUTR1 Full-Scale Voltage Range 1 VOUT_COMMAND = 2.75V (Note 9) l 2.711 2.788 V Set Point Accuracy (0.6V to 2.5V) l –0.5 0.5 % Resolution 12 Bits LSB Step Size 0.6875 mV VLINEREG Line Regulation 6V < VIN < 24V l ±0.02 %/V VLOADREG Load Regulation ∆VITH = 1.35V – 0.7V l 0.01 0.1 % ∆VITH = 1.35V – 2.0V l –0.01 –0.1 % gm Error Amplifier gm ITH =1.22V 3 mmho IISENSE Input Current VISENSE = 5.5V l ±1 ±2 µA VSENSERIN VSENSE Input Resistance to Ground 0V ≤ VPIN ≤ 5.5V 47 kΩ VIlLIMIT Resolution 3 bits VILIMMAX Hi Range l 68 75 82 mV Lo Range l 44 50 56 mV VILIMMIN Hi Range 37.5 mV Lo Range 25 mV Rev. F For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Overview Main Control Loop EEPROM Power Up and Initialization Soft-Start Sequencing Voltage-Based Sequencing Shutdown Light Load Current Operation Switching Frequency and Phase Output Voltage Sensing Output Current Sensing Auto Calibration Accurate DCR Temperature Compensation Input Current Sensing Load Sharing External/Internal Temperature Sense RCONFIG (Resistor Configuration) Pins Fault Detection and Handling Internal Memory with CRC and ECC Serial Interface Communication Failure 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 Overtemperature Fault Response—Internal Overtemperature and Undertemperature Fault Response—Externals Responses To Input Overcurrent And Output Undercurrent Faults Responses to External Faults Fault Logging Bus Timeout Failure Similarity Between PMBus, SMBus and I2C 2-Wire Interface PMBus Serial Digital Interface PMBus Command Summary PMBus Commands *Data Format 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 Schottky Diode (Optional) Selection Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) INTVCC Regulator Topside MOSFET Driver Supply (CB, DB) Undervoltage Lockout CIN and COUT Selection Fault Conditions Open-Drain Pins Phase-Locked Loop and Frequency Synchronization Minimum On-Time Considerations Input Current Sense Amplifier RCONFIG (External Resistor Configuration Pins) Voltage Selection Frequency and Phase Selection Using RCONFIG Address Selection Using RCONFIG Efficiency Considerations Checking Transient Response PolyPhase Configuration PC Board Layout Checklist PC Board Layout Debugging Design Example Connecting the USB to I2C/SMBus/PMBus Controller to the LTC3883 In System Inductor DCR Auto Calibration Accurate DCR Temperature Compensation 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 Current Output Current Calibration Output Current Input Current Calibration Input Current Temperature External Temperature Calibration External Temperature Limits 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 Telemetry NVM Memory Commands Store/Restore Fault Logging Block Memory Write/Read Typical Applications Package Description Revision History Typical Application Related Parts