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参数资料
| 型号： | LTC3880IUJ#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/112页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 40-QFN |
| 软件下载： | LTpowerPlay™ |
| 标准包装： | 2,000 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1MHz |
| 电源电压： | 4.5 V ~ 24 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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LTC3880/LTC3880-1
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:
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Average Output Current
Average PWM Duty Cycle
Average Output Voltage
Average Input Voltage
Average Input Current
Configurable, Latched and Unlatched Individual Fault
and Warning Status
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Programmable Output Voltage
Programmable Input Voltage Comparator
Programmable Current Limit
Programmable Switching Frequency
Programmable OV and UV Comparators
Programmable On and Off Delay Times
Programmable Output Rise/Fall Times
Phase-Locked Loop for Synchronous, Polyphase Opera-
tion (2, 3, 4 or 6 Phases)
Individual channels are accessed through the PMBus using
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:
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Input and Output Voltage/Current, Temperature and
Duty Cycle Telemetry
Fully Differential Load Sense
Integrated Gate Drivers
Non-Volatile Configuration Memory
Optional External Configuration Resistors for Key
Operating Parameters
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Output Undervoltage/Overvoltage
Input Undervoltage/Overvoltage
Input and Output Overcurrent
Internal Overtemperature
External Overtemperature
Communication, Memory or Logic (CML) Fault
Optional Time-Base Interconnect for Synchronization
Fault Logging
WP Pin to Protect Internal Configuration
Standalone Operation After User Factory Configuration
PMBus, 400kHz Compliant Interface
Internal Controller Temperature
External System Temperature via Optional Diode Sense
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Between Multiple Controllers
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The PMBus interface provides access to important power
management data during system operation including:
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Elements
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, I CMP , resets the RS latch.
The peak inductor current at which I CMP resets the RS
latch is controlled by the voltage on the I TH pin which is
the output of each error amplifier, EA. The EA negative
terminal is equal to the V SENSE voltage divided by 5.5
(2.75 if range = 1). The positive terminal of the EA is
connected to the output of a 12-bit DAC with values ranging
3880fb
For more information www.linear.com/LTC3880
15
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相关代理商/技术参数 |
参数描述 |
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| 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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