Datasheet LTC7851, LTC7851-1 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Quad Output, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing |
| Pages / Page | 38 / 5 — ELECTRICAL CHARACTERISTICS Note 1:. Note 2:. Note 3:. Note 4:. Note 5:. … |
| Revision | A |
| File Format / Size | PDF / 4.2 Mb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS Note 1:. Note 2:. Note 3:. Note 4:. Note 5:. TYPICAL PERFORMANCE CHARACTERISTICS
Model Line for this Datasheet
Text Version of Document
link to page 19 LTC7851/LTC7851-1
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings thermal impedance and other environmental factors. TJ is calculated from may cause permanent damage to the device. Exposure to any Absolute the ambient temperature TA and power dissipation PD according to the Maximum Rating condition for extended periods may affect device following formula: reliability and lifetime. TJ = TA + (PD • 49˚C/W)
Note 2:
The LTC7851/LTC7851-1 are tested under pulsed load conditions
Note 3:
The maximum VOUT range is limited by the current sense pins such that TJ ≈ TA. The LTC7851E/LTC7851E-1 are guaranteed to meet (ISNSP/ISNSN) common mode voltage range. See the Current Sensing in performance specifications from 0°C to 85°C. Specifications over the the Applications Information section. –40°C to 125°C operating junction temperature range are assured by
Note 4:
Guaranteed by design. design, characterization and correlation with statistical process controls. The LTC7851I/LTC7851I-1 are guaranteed over the –40°C to 125°C
Note 5:
The Absolute Maximum Voltage Rating for the VINSNS voltage operating junction temperature range. Note that the maximum ambient limits the Maximum VIN Voltage. For operation with a VIN range higher temperature consistent with these specifications is determined by specific than 27V, the VINSNS pin must be connected through a resistor divider operating conditions in conjunction with board layout, the rated package from VIN to limit the maximum VINSNS voltage to less than 27V.
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Transient Response Load Step Transient Response (Single Phase Using (2-Phase Using FDMF58200C FDMF5820DC DrMOS) DrMOS)
I I LOAD LOAD 20A/DIV 25A/DIV 0A TO 15A TO 0A IL1 I 10A/DIV L 20A/DIV IL2 V 10A/DIV OUT AC-COUPLED V 50mV/DIV V OUT IN = 12V f AC-COUPLED SW = 400kHz VOUT = 1.8V 50mV/DIV 50µs/DIV 7851 G01 20µs/DIV 7851 G02 VIN = 12V VOUT = 1.2V fSW = 400kHz ILOAD = 10A TO 30A TO 10A
Load Step Transient Response Load Step Transient Response (3-Phase Using FDMF5820DC (4-Phase Using FDMF5820DC DrMOS) DrMOS)
I I L1 LOAD 20A/DIV 50A/DIV 0A TO 50A TO 0A IL2 20A/DIV VOUT IL3 AC-COUPLED 20A/DIV 20mV/DIV V V OUT IN = 12V AC-COUPLED VOUT = 1.2V 50mV/DIV fSW = 400kHz 7851 G04 40µs/DIV 7851 G03 40µs/DIV VIN = 12V VOUT = 1.2V fSW = 400kHz ILOAD = 0A TO 38A TO 0A Rev A 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 Operation Applications Information Typical Applications Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings thermal impedance and other environmental factors. TJ is calculated from may cause permanent damage to the device. Exposure to any Absolute the ambient temperature TA and power dissipation PD according to the Maximum Rating condition for extended periods may affect device following formula: reliability and lifetime. TJ = TA + (PD • 49˚C/W)
Note 2:
The LTC7851/LTC7851-1 are tested under pulsed load conditions
Note 3:
The maximum VOUT range is limited by the current sense pins such that TJ ≈ TA. The LTC7851E/LTC7851E-1 are guaranteed to meet (ISNSP/ISNSN) common mode voltage range. See the Current Sensing in performance specifications from 0°C to 85°C. Specifications over the the Applications Information section. –40°C to 125°C operating junction temperature range are assured by
Note 4:
Guaranteed by design. design, characterization and correlation with statistical process controls. The LTC7851I/LTC7851I-1 are guaranteed over the –40°C to 125°C
Note 5:
The Absolute Maximum Voltage Rating for the VINSNS voltage operating junction temperature range. Note that the maximum ambient limits the Maximum VIN Voltage. For operation with a VIN range higher temperature consistent with these specifications is determined by specific than 27V, the VINSNS pin must be connected through a resistor divider operating conditions in conjunction with board layout, the rated package from VIN to limit the maximum VINSNS voltage to less than 27V.
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Transient Response Load Step Transient Response (Single Phase Using (2-Phase Using FDMF58200C FDMF5820DC DrMOS) DrMOS)
I I LOAD LOAD 20A/DIV 25A/DIV 0A TO 15A TO 0A IL1 I 10A/DIV L 20A/DIV IL2 V 10A/DIV OUT AC-COUPLED V 50mV/DIV V OUT IN = 12V f AC-COUPLED SW = 400kHz VOUT = 1.8V 50mV/DIV 50µs/DIV 7851 G01 20µs/DIV 7851 G02 VIN = 12V VOUT = 1.2V fSW = 400kHz ILOAD = 10A TO 30A TO 10A
Load Step Transient Response Load Step Transient Response (3-Phase Using FDMF5820DC (4-Phase Using FDMF5820DC DrMOS) DrMOS)
I I L1 LOAD 20A/DIV 50A/DIV 0A TO 50A TO 0A IL2 20A/DIV VOUT IL3 AC-COUPLED 20A/DIV 20mV/DIV V V OUT IN = 12V AC-COUPLED VOUT = 1.2V 50mV/DIV fSW = 400kHz 7851 G04 40µs/DIV 7851 G03 40µs/DIV VIN = 12V VOUT = 1.2V fSW = 400kHz ILOAD = 0A TO 38A TO 0A Rev A 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 Operation Applications Information Typical Applications Package Description Typical Application Related Parts
