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LM21212-1

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具有频率同步功能的 2.95-5.5V、12A、电压模式同步降压稳压器

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LM21212-1

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产品详情

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1500 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode Voltage mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 1500 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1500 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode Voltage mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 1500 Duty cycle (max) (%) 100
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4

  • Integrated 7.0 mΩ high side and 4.3 mΩ low side FET switches
  • 300 kHz to 1.5 MHz frequency SYNC pin
  • Adjustable output voltage from 0.6V to VIN (100% duty cycle capable), ±1% reference
  • Input voltage range 2.95V to 5.5V
  • Startup into pre-biased loads
  • Output voltage tracking capability
  • Wide bandwidth voltage loop error amplifier
  • Adjustable soft-start with external capacitor
  • Precision enable pin with hysteresis
  • Integrated OVP, OCP, OTP, UVLO and Power-Good
  • Thermally Enhanced eTSSOP-20 exposed pad package
    •

  • Integrated 7.0 mΩ high side and 4.3 mΩ low side FET switches
  • 300 kHz to 1.5 MHz frequency SYNC pin
  • Adjustable output voltage from 0.6V to VIN (100% duty cycle capable), ±1% reference
  • Input voltage range 2.95V to 5.5V
  • Startup into pre-biased loads
  • Output voltage tracking capability
  • Wide bandwidth voltage loop error amplifier
  • Adjustable soft-start with external capacitor
  • Precision enable pin with hysteresis
  • Integrated OVP, OCP, OTP, UVLO and Power-Good
  • Thermally Enhanced eTSSOP-20 exposed pad package
    •

    The LM21212-1 is a monolithic synchronous point of load buck regulator that is capable of delivering up to 12A of continuous output current while producing an output voltage down to 0.6V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95V to 5.5V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.

    The LM21212-1 features internal over voltage protection (OVP) and over-current protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turn-on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.

    The LM21212-1 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be synchronized to the falling edge of a clock between frequencies of 300kHz to 1.5MHz.

    If the output is pre-biased at startup, it will not sink current, allowing the output to smoothly rise past the pre-biased voltage. The regulator is offered in a 20-pin eTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

    The LM21212-1 is a monolithic synchronous point of load buck regulator that is capable of delivering up to 12A of continuous output current while producing an output voltage down to 0.6V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95V to 5.5V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.

    The LM21212-1 features internal over voltage protection (OVP) and over-current protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turn-on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.

    The LM21212-1 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be synchronized to the falling edge of a clock between frequencies of 300kHz to 1.5MHz.

    If the output is pre-biased at startup, it will not sink current, allowing the output to smoothly rise past the pre-biased voltage. The regulator is offered in a 20-pin eTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

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    技术文档

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    类型 标题 下载最新的英语版本 日期
    * 数据表 12A High Efficiency Synchronous Point of Load Buck Regulator with Freq Sync (cn) 数据表 (Rev. D) 最新英语版本 (Rev.F) PDF | HTML 2011年 5月 24日
    选择指南 Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
    选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
    选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
    用户指南 AN-2107 LM21212-1 Evaluation Board (Rev. B) 2013年 5月 5日
    设计指南 适用于 Xilinx FPGA 的模拟器件 解决方案指南 2012年 4月 24日

    设计和开发

    如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

    评估板

    LM21212-1EVM — LM21212-1EVM 评估板

    This evaluation board provides a solution to examine the high efficiency LM21212-1 buck switching regulator. The LM21212-1 is capable of driving up to 12A of continuous load current with excellent output voltage accuracy due to its ±1% internal reference. This device also features a clock (...)

    用户指南: PDF
    TI.com 上无现货
    仿真模型

    LM21212-1 PSpice Average Model

    SNVM395.ZIP (53 KB) - PSpice Model
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    仿真模型

    LM21212-1 PSpice Transient Model

    SNVM394.ZIP (192 KB) - PSpice Model
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    仿真模型

    LM21212-1 Unencrypted PSpice Average Model

    SNVM802.ZIP (1 KB) - PSpice Model
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    仿真模型

    LM21212-1 Unencrypted PSpice Transient Model

    SNVM801.ZIP (2 KB) - PSpice Model
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    计算工具

    LM21212-1DESIGN-CALC — LM21212-1 设计电子表格

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    参考设计

    PMP7804 — 适用于 Kintex 7 应用的多输出电源参考设计

    PMP7804 参考设计提供为 Xilinx ® Kintex ® 7 系列 FPGA 供电所需的所有电源轨。该设计使用 Simple Switcher 电源模块以及 LM2121x 低压同步降压稳压器，使用方便，设计周期更短。此设计已针对 12V 输入经过优化。
    测试报告: PDF
    原理图: PDF
    封装 引脚 CAD 符号、封装和 3D 模型
    HTSSOP (PWP) 20 Ultra Librarian
    应遵守 TI 评估类商品的标准条款与条件。

    订购和质量

    包含信息：
    • RoHS
    • REACH
    • 器件标识
    • 引脚镀层/焊球材料
    • MSL 等级/回流焊峰值温度
    • MTBF/时基故障估算
    • 材料成分
    • 鉴定摘要
    • 持续可靠性监测
    包含信息：
    • 制造厂地点
    • 封装厂地点

    支持和培训

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