产品详细信息

Vin (Min) (V) 4.5 Vin (Max) (V) 17 Vout (Min) (V) 0.8 Vout (Max) (V) 15 Iout (Max) (A) 5 Iq (Typ) (uA) 600 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 900 Features Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, Soft Start Adjustable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4.5 Vin (Max) (V) 17 Vout (Min) (V) 0.8 Vout (Max) (V) 15 Iout (Max) (A) 5 Iq (Typ) (uA) 600 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 900 Features Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, Soft Start Adjustable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
VQFN (RHL) 14 12 mm² 3.5 x 3.5
  • Integrated 57mΩ / 50mΩ MOSFETs
  • Split Power Rail: 1.6V to 17V on PVIN
  • 200kHz to 900kHz Switching Frequency
  • Synchronizes to External Clock
  • 0.8V Voltage Reference
  • Low 2µA Shutdown Quiescent Current
  • Hiccup Overcurrent Protection
  • Monotonic Start-Up into Prebiased Outputs
  • –40°C to 125°C
    Operating Junction Temperature Range
  • Pin-to-Pin Compatible with the TPS54620
  • Adjustable Slow Start/Power Sequencing
  • Power Good Output for Undervoltage and
    Overvoltage Monitoring
  • Adjustable Input Undervoltage Lockout
  • Supported by SwitcherPro Software Tool
  • APPLICATIONS
    • Flat Panel Digital TVs
    • Set Top Boxes, Personal Video Recorders
    • Net Books
    • High Density 3.3V/5V Power Distribution
      from 12 V Bus

  • Integrated 57mΩ / 50mΩ MOSFETs
  • Split Power Rail: 1.6V to 17V on PVIN
  • 200kHz to 900kHz Switching Frequency
  • Synchronizes to External Clock
  • 0.8V Voltage Reference
  • Low 2µA Shutdown Quiescent Current
  • Hiccup Overcurrent Protection
  • Monotonic Start-Up into Prebiased Outputs
  • –40°C to 125°C
    Operating Junction Temperature Range
  • Pin-to-Pin Compatible with the TPS54620
  • Adjustable Slow Start/Power Sequencing
  • Power Good Output for Undervoltage and
    Overvoltage Monitoring
  • Adjustable Input Undervoltage Lockout
  • Supported by SwitcherPro Software Tool
  • APPLICATIONS
    • Flat Panel Digital TVs
    • Set Top Boxes, Personal Video Recorders
    • Net Books
    • High Density 3.3V/5V Power Distribution
      from 12 V Bus

The TPS54521 is a full featured 17V, 5A synchronous step down converter which is optimized for small designs through high efficiency and integrated high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor’s footprint.

The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.

Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature. The TPS54521 is available in a 14 pin, 3.5mm × 3.5mm QFN, thermally enhanced package.

The TPS54521 is a full featured 17V, 5A synchronous step down converter which is optimized for small designs through high efficiency and integrated high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor’s footprint.

The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.

Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature. The TPS54521 is available in a 14 pin, 3.5mm × 3.5mm QFN, thermally enhanced package.

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TPS565201 正在供货 采用 SOT23 封装的 4.5V 至 17V 5A 同步降压稳压器 Simplify design with minimum external component count.

技术文档

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类型 标题 下载最新的英文版本 日期
* 数据表 17V Input, 5A Output, Synchronous Step Down Switcher With Integrated FET 数据表 (Rev. C) 2013年 8月 28日
用户指南 TPS54521 Step-Down Converter Evaluation Module User's Guide (Rev. A) 2021年 8月 26日
技术文章 Minimize the impact of the MLCC shortage on your power application 2019年 3月 29日
应用手册 Designing Type III Compensation for Current Mode Step-Down Converters (Rev. A) 2010年 9月 15日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

评估板

TPS54521EVM-607 — 用于 TPS54521 同步降压稳压器的评估模块

TPS54521EVM-607 是一块完全组装且经过测试的电路板,用于评估具有集成 FET 的 TPS54521 同步降压开关。
现货
数量限制: 5
仿真工具

PSPICE-FOR-TI — PSPICE® for TI design and simulation tool

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。 

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
计算工具

TPS54620DESIGN-CALC — TPS54620 & TPS54XXX 电流型降压转换器设计计算器

设计计算器与应用手册 (SLVA352A) 计算器工具可以计算 TPS54620/TPS54622/TPS54521/TPS54320/TPS54618/TPS54418/TPS54318/TPS54218/TPS54319 的临界外部组件值。此计算器包括功率级设计、功能设计以及类型 II 和类型 III 补偿设计,并且使用数据表方程和应用手册 (SLVA352A) 方程。此计算器利用常规功率级和补偿设计代数,可对大多数电流模式降压 DC/DC 转换器进行修改
参考设计

TIDA-00570 — 用于工业 3D 打印和数字平板印刷的高速 DLP 子系统参考设计

高速 DLP® 子系统参考设计提供系统级 DLP 开发板设计,适用于需要高分辨率、超高速度和生产可靠性的工业数字平版印刷术和 3D 打印应用。该系统设计通过集成最高分辨率的 DLP 数字微镜器件 DLP9000X 和最快的数字控制器 DLPC910 来提供最大的吞吐量。这种组合具有超过 400 万个微镜(WQXGA 分辨率),从而能实现超过 60 千兆比特每秒 (Gbps) 的连续流数据速率。DLPC910 数字控制器还为设计人员提供先进的像素控制,除了可以进行全帧输入,还可以进行随机行寻址。这一增加的灵活性支持各种架构,适用于工业、医疗、安全、电信和仪表等应用。
参考设计

PMP5555 — 同步降压转换器 (3.3V (0.5A))

PMP5555 包含两个降压转换器 TPS54521,通过 14V-15V 输入电压分别产生 3.3V (0.5A) 和 6.3V (1.5A) 输出。
参考设计

TIDEP0011 — 用于 C667x DSP AVS 内核 (CVDD) 的具有动态电压调节的电源解决方案

该参考设计旨在在 Keystone 多核 DSP(主要是 C66x 系列)中提供 AVS 内核电源 (CVDD)。C66x 系列使用 SmartReflex 技术使 DSP 能够控制其电源电压。为了符合此要求,该设计将同步降压转换器 (TPS56121) 与 POL 的电压编程器 (LM10011) 结合在一起。 LM10011 可以接受来自 DSP 的 6 位或 4 位 VCNTL,并将 TPS56121 的输出电压更改为 DSP 需要的电压。LM10011 具有高精度 (1.0%),允许其余的电源组件和配电存在附加系统裕度。对于需要特定初始启动电压的处理器,可以将 LM10011 (...)
封装 引脚 下载
VQFN (RHL) 14 了解详情

订购与质量

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/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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