參數(shù)資料
型號(hào)： LTC3880IUJ#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC40
封裝： 6 X 6 MM, LEAD FREE, PLASTIC, WJJD-2, QFN-40
文件頁(yè)數(shù)： 20/112頁(yè)
文件大?。?/td> 2182K
代理商： LTC3880IUJ#PBF
LTC3880/LTC3880-1
15
3880fa
OPERATION
OVERVIEW
The LTC3880 is a dual channel/dual phase, constant fre-
quency, analog current mode controller for DC/DC step-
down applications with a digital interface. The LTC3880
digital interface is compatible with PMBus which supports
bus speeds of up to 400kHz. A typical application circuit
is shown on the first page of this data sheet.
Major features include:
n
Programmable Output Voltage
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Programmable Input Voltage Comparator
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Programmable Current Limit
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Programmable Switching Frequency
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Programmable OV and UV Comparators
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Programmable On and Off Delay Times
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Programmable Output Rise/Fall Times
n
Phase-LockedLoopforSynchronous,PolyphaseOpera-
tion (2, 3, 4 or 6 Phases)
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Input and Output Voltage/Current, Temperature and
Duty Cycle Telemetry
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Fully Differential Load Sense
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Integrated Gate Drivers
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Non-Volatile Configuration Memory
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Optional External Configuration Resistors for Key
Operating Parameters
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Optional Time-Base Interconnect for Synchronization
Between Multiple Controllers
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Fault Logging
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WP Pin to Protect Internal Configuration
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StandaloneOperationAfterUserFactoryConfiguration
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PMBus, 400kHz Compliant Interface
The PMBus interface provides access to important power
management data during system operation including:
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Internal Controller Temperature
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External System Temperature via Optional Diode Sense
Elements
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Average Output Current
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Average PWM Duty Cycle
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Average Output Voltage
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Average Input Voltage
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Average Input Current
n
Configurable, Latched and Unlatched Individual Fault
and Warning Status
IndividualchannelsareaccessedthroughthePMBususing
the PAGE command, i.e., PAGE 0 or 1.
Fault reporting and shutdown behavior are fully configu-
rable. Two individual GPIO outputs are provided (GPIO0,
GPIO1), both of which can be masked independently. A
dedicated pin for ALERT is provided. The shutdown opera-
tion also allows all faults to be individually masked and can
be operated in either unlatched (hiccup) or latched modes.
Individual status commands enable fault reporting over
the serial bus to identify the specific fault event. Fault or
warning detection includes the following:
n
Output Undervoltage/Overvoltage
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Input Undervoltage/Overvoltage
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Input and Output Overcurrent
n
Internal Overtemperature
n
External Overtemperature
n
Communication, Memory or Logic (CML) Fault
MAIN CONTROL LOOP
The LTC3880 is a constant frequency, current mode step-
down controller containing two channels operating with
various user-defined relative phasing. During normal
operation each top MOSFET is turned on when the clock
for that channel sets the RS latch, and turned off when
the main current comparator, ICMP, resets the RS latch.
The peak inductor current at which ICMP resets the RS
latch is controlled by the voltage on the ITH pin which is
the output of each error amplifier, EA. The EA negative
terminal is equal to the VSENSE voltage divided by 5.5
(2.75 if range = 1). The positive terminal of the EA is
connectedtotheoutputofa12-bitDACwithvaluesranging
相關(guān)PDF資料
PDF描述
LTC3880EUJ-1#TRPBF 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC40
LTC3880EUJ-1#PBF 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC40
LTC3880IUJ-1#PBF 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC40
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3883EUH#PBF 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 制造商:Linear Technology 功能描述:BUCK CNTRL 24V 1MHZ 0.5/5.5V 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, 24V, 1MHZ, 0.5/5.5V, 32QFN 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 1MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:30A, Supply Voltage Min:4.5V, Supply Voltage Max:24V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:1MHz, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Digitally Programmable, Multiphase Step-Down DC/DC Controll
LTC3883EUH#TRPBF 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Digitally Programmable, Multiphase Step-Down DC/DC Controll
LTC3883EUH-1#PBF 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 制造商:Linear Technology 功能描述:BUCK CNTRL 24V 1MHZ 0.5/5.5V 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, 24V, 1MHZ, 0.5/5.5V, 32QFN 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 1MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:30A, Supply Voltage Min:4.5V, Supply Voltage Max:24V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:1MHz, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Digitally Programmable, Multiphase Step-Down DC/DC Controll
LTC3883EUH-1#TRPBF 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN
LTC3883IUH#PBF 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Sync Step Down 4.5V to 24V Input 32-Pin QFN EP 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 制造商:Linear Technology 功能描述:BUCK CNTRL 24V 1MHZ 0.5/5.5V 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, 24V, 1MHZ, 0.5/5.5V, 32QFN 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 1MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:30A, Supply Voltage Min:4.5V, Supply Voltage Max:24V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:1MHz, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Digitally Programmable, Multiphase Step-Down DC/DC Controll
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