LTC3634
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LTC3634

用于 DDR 电源的 15V、双通道、3A、单片式、降压型稳压器

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Info: : 量产 tooltip
产品详情
特性
  • 3.6V 至15V 输入电压范围
  • 每通道的输出电流为±3A
  • 效率高达 95%
  • 通道之间的 90°/180° 可选相移
  • 可调开关频率范围:500kHz 至 4MHz
  • VTTR = VDDQ / 2 = VTT基准
  • 准确度为 ±1.6% 的 VTTR (在 0.75V)
  • 最佳 VOUT范围:0.6V 至 3V
  • ±10mA 缓冲输出负责提供 VREF 基准电压
  • 旨在实现超卓的电压和负载瞬态响应的电流模式操作
  • 外部时钟同步
  • 短路保护
  • 输入过压和过热保护
  • 电源良好状态输出
  • 采用 (4mm x 5mm) QFN-28 封装和耐热性能增强型 28 引脚 TSSOP 封装
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LTC®3634 是一款高效率、双通道、单片式、同步降压型稳压器,可为 DDR1、DDR2 和 DDR3 SDRAM 控制器提供电源及总线终端电压轨。该器件的工作输入电压范围为 3.6V 至 15V,从而使其适合于那些采用一个 5V 或 12V 输入的负载点电源应用以及各种电池供电型系统。

VTT 稳定输出电压等于 VDDQIN • 0.5。一个能驱动 10mA 负载的片内缓冲器可提供一个也等于 VDDQIN • 0.5 的低噪声基准输出 (VTTR)。

此 IC 的工作频率可利用一个外部电阻器在 500kHz 至 4MHz 的范围内进行设置和同步处理。两个通道能够 180° 异相运行,这放宽了对输入和输出电容的要求。独特的受控接通时间架构非常适合在高开关频率条件下采用一个 12V 电源来给 DDR 应用电路供电,因而允许使用较小的外部组件。

LTC3634 可提供 28 引脚 4mm x 5mm QFN 封装和具裸露衬垫的 28 引脚 TSSOP  封装。


Applications

  • DDR 存储器电源

产品技术资料帮助

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ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许,也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。

参考资料

参考资料

视频

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产品生命周期

PCN

4月 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3634EFE#PBF

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产品型号

产品生命周期

PCN

4月 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3634EFE#PBF

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LTC3634EFE#TRPBF

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软件和型号相关生态系统

软件和型号相关生态系统

评估

评估套件 2

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DC1839A

LTC3634EFE Demo Board (TSSOP) | VIN = 3.6V to 15V, VOUT1 = 1.5V/1.8V/2.5V @ ±3A, VOUT2 = 0.5VIN (VTT) @ ±3A, VOUT3 = 0.5VIN (VTTR) @ ±10mA

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DC1839A

LTC3634EFE Demo Board (TSSOP) | VIN = 3.6V to 15V, VOUT1 = 1.5V/1.8V/2.5V @ ±3A, VOUT2 = 0.5VIN (VTT) @ ±3A, VOUT3 = 0.5VIN (VTTR) @ ±10mA

LTC3634EFE Demo Board (TSSOP) | VIN = 3.6V to 15V, VOUT1 = 1.5V/1.8V/2.5V @ ±3A, VOUT2 = 0.5VIN (VTT) @ ±3A, VOUT3 = 0.5VIN (VTTR) @ ±10mA

产品详情

Demonstration circuit 1839A is a dual output regulator focused specifically for DDR memory power applications. It is built based on the LTC3634EFE (TSSOP-28E package), a high voltage dual channel, controlled on-time monolithic synchronous buck regulator. The DC1839A has an input voltage range of 3.6V to 15V. demo board's output voltage of the first channel, VDDQ, has three fixed voltage settings; 1.5V, 1.8V, and 2.5V, and is capable of delivering up to ±3A of output current. The second channel, VTT, is set to regulate to half the voltage on the VDDQIN pin, which can be either the channel 1 output or an external reference voltage. It can also source or sink a maximum of 3A. The LTC3634 also provides a ±10mA buffered output, VTTR, which is half of VDDQIN and is used to provide the reference voltage needed for DDR applications.

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DC1708A

LTC3634EUFD Demo Board (QFN) | VIN= 3.6V to 15V, VOUT1 =1.5V/1.8V/2.5V@±3A, VOUT2 = 0.5VIN (VTT)@±3A, VOUT3 = 0.5VIN (VTTR)@±10mA

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DC1708A

LTC3634EUFD Demo Board (QFN) | VIN= 3.6V to 15V, VOUT1 =1.5V/1.8V/2.5V@±3A, VOUT2 = 0.5VIN (VTT)@±3A, VOUT3 = 0.5VIN (VTTR)@±10mA

LTC3634EUFD Demo Board (QFN) | VIN= 3.6V to 15V, VOUT1 =1.5V/1.8V/2.5V@±3A, VOUT2 = 0.5VIN (VTT)@±3A, VOUT3 = 0.5VIN (VTTR)@±10mA

产品详情

Demonstration circuit DC1708A is a dual-output regulator focused specifically for DDR memory power applications. It is built based on the LTC3634, a high voltage dualchannel, controlled on-time monolithic synchronous buck regulator. The DC1708A has an input voltage range of 3.6V to 15V. The output voltage of the first channel, VDDQ, of the DC1708A has three fixed voltage settings: 1.5V, 1.8V and 2.5V, and is capable of delivering up to 3A of output current. The second channel, VTT, is set to regulate to half the voltage on the VDDQIN pin, which can be either the channel 1 output or an external reference voltage. It can source or sink a maximum of 3A of output current. The LTC3634 also provides a 10mA buffered output of half VDDQIN – VTTR, which is used to provide the reference voltage needed for DDR applications. With the use of a timing resistor, the DC1708A can have its operating frequency programmed from 500kHz to 4MHz. Additionally the DC1708A can be easily synchronized to an external clock, due to an internal phase-locked loop, within this same frequency range. The DC1708A VDDQ output can operate in either Burst Mode® operation or forced continuous mode. In Burst Mode operation, which is the preferred mode of low load current operation, the DC supply current is typically only 1.3mA (both channels) at no load (sleep mode), and less than 15µA in shutdown. In Burst Mode operation or continuous mode operation, the DC1708A is a very efficient circuit at high load currents: over 80% for either channel. The LTC3634 is also capable of 90° or 180° out-of-phase operation, and can allow its output to track an external voltage, either coincidentally or ratiometrically. The LTC3634 comes in a 28-pin QFN package, featuring an exposed pad on the bottom-side of the IC for better thermal performance. All of these features make the DC1708A an ideal circuit for powering DDR memory applications.

工具和仿真

工具及仿真模型 2

LTspice®是一款强大高效的免费仿真软件、原理图采集和波形观测器,为改善模拟电路的仿真提供增强功能和模型。

参考电路

参考电路 5

AI XCXM1902 Minimum Rails and PL Performance

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AI XCXM1902 Minimum Rails and PL Performance

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参考设计

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AI XCXM1902 Minimum Rails and PL Performance

特性和优点

ADI Key Power Management Features for Versal PRIME XCXM1802 for Minimum Rails / PL Performance

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LT8607 is a compact, high efficiency, high speed 750mA synchronous monolithic.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
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AI XCXM1802 for Optimized Efficiency

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AI XCXM1802 for Optimized Efficiency

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参考设计

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AI XCXM1802 for Optimized Efficiency

特性和优点

ADI Key Power Management Features for Versal ACAP XCXM1802 for Optimized Efficiency

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
查看参考设计详情 external link

AI XCXM1802 for Full Management Mid to High Voltage

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AI XCXM1802 for Full Management Mid to High Voltage

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参考设计

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AI XCXM1802 for Full Management Mid to High Voltage

特性和优点

ADI Key Power Management Features for Versal ACAP XCXM1802 for Mid to High Voltage

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3644 is a quad 1.25A output, high efficiency synchronous monolithic capable of switching up to 2.25MHz.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
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XCXM1802 Low Voltage

AI XCXM1802 for Low Voltage

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AI XCXM1802 for Low Voltage

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参考设计

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AI XCXM1802 for Low Voltage

特性和优点

ADI Key Power Management Features for Versal PRIME XCXM1802 for Low Voltage

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3644 is a quad 1.25A output, high efficiency synchronous monolithic capable of switching up to 2.25MHz.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
查看参考设计详情 external link
Versal AI Core Board

Edge Core FPGA Power Delivery Reference Design

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Edge Core FPGA Power Delivery Reference Design

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参考设计

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Edge Core FPGA Power Delivery Reference Design

特性和优点

The ADI Versal AI Core Power Reference Design Board has been tested and proven to power the key rails for the Xilinx Versal AI Core ACAP series. Using a PMBUs Multi Phase DC/DC controller coupled with ADI SilentMOS (ADI version of DrMOS) to deliver up to 240A of output current.

The ADI LTC3888-1 is an 8 Phase PMBUs DC/DC controller that is coupled with the LTC7051 ADI SilentMOS to provide a flexible and scalable design that can be tailored as needed for both higher and lower power applications by adding or subtracting the LTC7051 ADI SilentMOS.

Request schematic for ADI power used on the board.

Contact ADI if you have questions about the ADI power management solutions used on this board.

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