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TPS56921

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具有 VID 控制的 4.5V 至 17V、9A 同步降压转换器

产品详情

Vin (min) (V) 4.5 Vin (max) (V) 17 Vout (min) (V) 0.72 Vout (max) (V) 1.48 Iout (max) (A) 9 Iq (typ) (mA) 0.77 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1600 Features Adaptive/Dynamic Voltage Scaling, Enable, Forced PWM, Power good, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 100 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 17 Vout (min) (V) 0.72 Vout (max) (V) 1.48 Iout (max) (A) 9 Iq (typ) (mA) 0.77 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1600 Features Adaptive/Dynamic Voltage Scaling, Enable, Forced PWM, Power good, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 100 Type Converter
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • VID Control Range via I2C Compatible Interface:  0.72V to 1.48V in 10mV Steps
  • I2C Addressing Flexibility: 2 Bits by IC pins
  • ±1.5% Output Voltage over Temperature for VID Control
  • ±1% Reference Voltage over Temperature for External Regulation Mode
  • Integrated 26mΩ / 19mΩ MOSFETs
  • Power Input PVIN Voltage Range: 1.6V to 17V
  • Switching Frequency: 200kHz to 1.6MHz Internal Oscillator or Synchronizing to External Clock
  • Shutdown Current: 2µA
  • Monotonic Start-Up into Pre-biased Output Voltage
  • Overcurrent Protection for Both MOSFETs with Hiccup Mode for Severe Fault Conditions
  • Thermal and Overvoltage Protection
  • Adjustable Soft Start
  • Power Good Monitor for Under- and Over- Voltage Conditions
  • Operating Junction Temperature Range: –40°C to 125°C
  • Available in 20-Pin HTSSOP Package with PowerPADTM
  • VID Control Range via I2C Compatible Interface:  0.72V to 1.48V in 10mV Steps
  • I2C Addressing Flexibility: 2 Bits by IC pins
  • ±1.5% Output Voltage over Temperature for VID Control
  • ±1% Reference Voltage over Temperature for External Regulation Mode
  • Integrated 26mΩ / 19mΩ MOSFETs
  • Power Input PVIN Voltage Range: 1.6V to 17V
  • Switching Frequency: 200kHz to 1.6MHz Internal Oscillator or Synchronizing to External Clock
  • Shutdown Current: 2µA
  • Monotonic Start-Up into Pre-biased Output Voltage
  • Overcurrent Protection for Both MOSFETs with Hiccup Mode for Severe Fault Conditions
  • Thermal and Overvoltage Protection
  • Adjustable Soft Start
  • Power Good Monitor for Under- and Over- Voltage Conditions
  • Operating Junction Temperature Range: –40°C to 125°C
  • Available in 20-Pin HTSSOP Package with PowerPADTM

The TPS56921 in thermally enhanced 20-pin HTSSOP package is a full featured 17V, 9A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. After the initial power-up, the output voltage can be changed by codes sent to the IC via an I2C compatible VID Control bus. Current mode control provides space savings and easy compensation.

The output voltage startup ramp is controlled by the SS pin which helps to control startup inrush current. Power sequencing is supported by configuring the enable and the open drain power good pins. The output voltage is user-configurable at startup by external voltage divider.

Cycle by cycle current limiting on the high-side fet protects the TPS56921 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.

The TPS56921 in thermally enhanced 20-pin HTSSOP package is a full featured 17V, 9A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. After the initial power-up, the output voltage can be changed by codes sent to the IC via an I2C compatible VID Control bus. Current mode control provides space savings and easy compensation.

The output voltage startup ramp is controlled by the SS pin which helps to control startup inrush current. Power sequencing is supported by configuring the enable and the open drain power good pins. The output voltage is user-configurable at startup by external voltage divider.

Cycle by cycle current limiting on the high-side fet protects the TPS56921 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.

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类型 标题 下载最新的英语版本 日期
* 数据表 4.5V to 17V Input, 9A Synchronous Step Down SWIFT™ Converter With VID Control 数据表 2012年 10月 24日
EVM 用户指南 TPS56921 Buck Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 2021年 6月 24日

设计和开发

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评估板

TPS56921EVM-188 — TPS56921 评估模块

The Texas Instruments TPS56921EVM-188 evaluation module (EVM) helps designers evaluate the performance of the TPS56921 Synchronous Step-Down SWIFT™ Converter with VID Control. The EVM accepts a 4.5V to 17V input and delivers a 1.1V, 9A maximum output. An I2C interface is available for output (...)
用户指南: PDF | HTML
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仿真模型

TPS56921 Unencrypted PSpice Average Model Package (Rev. A)

SLVM693A.ZIP (27 KB) - PSpice Model
仿真模型

TPS56921 Unencrypted PSpice Transient Model Package (Rev. A)

SLVMAL6A.ZIP (93 KB) - PSpice Model
计算工具

TPS54620DESIGN-CALC TPS54620 and TPS54XXX Current-Mode Step-Down Converter Design Calculator

The Design Calculator Plus Application Note (SLVA352A) Calculator Tool calculates the critical external component values for the TPS54620/TPS54622/TPS54521/TPS54320/TPS54618/TPS54418/TPS54318/TPS54218/TPS54319. The calculator includes power stage design, feature design and Type II and Type III (...)
支持的产品和硬件

支持的产品和硬件

产品
降压转换器(集成开关)
TPS54218 2.95V 至 6V 输入、2A 同步降压 SWIFT™ 转换器 TPS54318 2.95V 至 6V 输入、3A 同步降压 SWIFT™ 转换器 TPS54319 采用 3mm x 3mm QFN 封装的 2.95V 至 6V 输入电压、3A、2MHz SWIFT™ 同步降压转换器 TPS54320 4.5V 至 17V 输入、3A 同步降压 SWIFT™ 转换器 TPS54418 2.95V 至 6V 输入、4A 同步降压 SWIFT™ 转换器 TPS54521 17V 输入、5A 同步降压转换器 TPS54618 2.95V 至 6V 输入、6A 同步降压 SWIFT™ 转换器 TPS54620 4.5V 至 17V、6A 同步 SWIFT™ 降压转换器 TPS54622 具有断续电流限制的 4.5V 至 17V、6A 同步 SWIFT™ 降压转换器 TPS54821 具有断续电流限制的 4.5V 至 17V、8A 同步降压转换器 TPS56921 具有 VID 控制的 4.5V 至 17V、9A 同步降压转换器
硬件开发
评估板
TPS54418EVM-375 TPS54418 3.3V 输入、1.8V 输出、4A SWIFT™ 转换器评估模块 TPS54620EVM-374 TPS54620 8V 至 17V、6A SWIFT™ 转换器评估模块
软件
计算工具
TPS54620DESIGN-CALC TPS54620 & TPS54XXX 电流型降压转换器设计计算器
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

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 (...)
封装 引脚数 下载
HTSSOP (PWP) 20 了解详情

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
  • 认证摘要
  • 持续可靠性监测

支持与培训

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