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具有拉/灌电流能力、频率高达 1MHz 的增强型低输入(2.25V 至 5.5V)同步降压控制器

TPS40021 不推荐用于新设计
虽然我们会继续生产此产品供先前的设计使用,但不推荐在新设计中使用此产品。请考虑从这些替代产品中选择一款:
open-in-new 比较替代产品
功能与比较器件相似
TPS40077 正在供货 采用 HTSSOP 封装、具有电压前馈的 4.5V 至 28V 同步降压控制器 4.5 to 28-Vin controller with programmable (up to 1-MHz) switching frequency in 3-mm x 3-mm QFN package.
TPS40303 正在供货 具有 FSS 的 3V 至 20V、25A、300kHz 同步降压控制器 3 to 20-Vin controller with 300-kHz switching frequency in 3-mm x 3-mm QFN package.
TPS40304 正在供货 具有 FSS 的 3V 至 20V、25A、600kHz 同步降压控制器 3 to 20-Vin controller with 600-kHz switching frequency in 3-mm x 3-mm QFN package.
TPS40305 正在供货 具有 FSS 的 3V 至 20V、25A、1.2MHz 同步降压控制器 3 to 20-Vin controller with 1.2-MHz switching frequency in 3-mm x 3-mm QFN package.
全新 TPS62876-Q1 正在供货 汽车类 2.7V 至 6V 输入、25A 可堆叠同步降压转换器 new generation
全新 TPS6287B25 正在供货 具有 I²C 和频率同步选项的 6V 输入、25A 可并联同步降压转换器 A simple solution with a low component count

产品详情

Vin (min) (V) 2.25 Vin (max) (V) 5.5 Vout (min) (V) 0.7 Vout (max) (V) 4 Iout (max) (A) 25 Iq (typ) (mA) 1.5 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Power good Operating temperature range (°C) -40 to 85 Regulated outputs (#) 1 Rating Catalog Type Controller
Vin (min) (V) 2.25 Vin (max) (V) 5.5 Vout (min) (V) 0.7 Vout (max) (V) 4 Iout (max) (A) 25 Iq (typ) (mA) 1.5 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Power good Operating temperature range (°C) -40 to 85 Regulated outputs (#) 1 Rating Catalog Type Controller
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • Operating Input Voltage 2.25 V to 5.5 V
  • Output Voltage as Low as 0.7 V
  • 1% Internal 0.7 V Reference
  • Predictive Gate Drive™ N-Channel MOSFET Drivers for Higher Efficiency
  • Externally Adjustable Soft-Start and Short Circuit Current Limit
  • Programmable Fixed-Frequency 100 kHz-to-1 MHz Voltage-Mode Control
  • Source-Only Current or Source/Sink Current
  • Quick Response Output Transient Comparators with Power Good Indication Provide Output Status
  • 16-Pin PowerPAD™ Package
  • APPLICATIONS
    • Networking Equipment
    • Telecom Equipment
    • Base Stations
    • Servers
    • DSP Power

PowerPAD and Predictive Gate Drive are trademarks of Texas Instruments.

  • Operating Input Voltage 2.25 V to 5.5 V
  • Output Voltage as Low as 0.7 V
  • 1% Internal 0.7 V Reference
  • Predictive Gate Drive™ N-Channel MOSFET Drivers for Higher Efficiency
  • Externally Adjustable Soft-Start and Short Circuit Current Limit
  • Programmable Fixed-Frequency 100 kHz-to-1 MHz Voltage-Mode Control
  • Source-Only Current or Source/Sink Current
  • Quick Response Output Transient Comparators with Power Good Indication Provide Output Status
  • 16-Pin PowerPAD™ Package
  • APPLICATIONS
    • Networking Equipment
    • Telecom Equipment
    • Base Stations
    • Servers
    • DSP Power

PowerPAD and Predictive Gate Drive are trademarks of Texas Instruments.

The TPS4002x family of dc-to-dc controllers are designed for non-isolated synchronous buck regulators, providing enhanced operation and design flexability through user programmability.

The TPS4002x utilizes a proprietary Predictive Gate Drive™ technology to minimize the diode conduction losses associated with the high-side and synchronous rectifier N-channel MOSFET transistions. The integrated charge pump with boost circuit provides a regulated 5-V gate drive for both the high side and synchronous rectifier N-channel MOSFETs. The use of the Predictive Gate Drive™ technology and charge pump/boost circuits combine to provide a highly efficient, smaller and less expensive converter.

Design flexibility is provided through user programmability of such functions as: operating frequency, short circuit current detection thresholds, soft-start ramp time, and external synchronization frequency. The operating frequency is programmable using a single resistor over a frequency range of 100 kHz to 1 MHz. Higher operating frequencies yield smaller component values for a given converter power level as well as faster loop closure.

The short circuit current detection is programmable through a single resistor, allowing the short circuit current limit detection threshold to be easily tailored to accommodate different size (RDS(on)) MOSFETs. The short circuit current function provides pulse-by-pulse current limiting during soft-start and short term transient conditions as well as a fault counter to handle longer duration short circuit current conditions. If a fault is detected the controller shuts down for a period of time determined by six (6) consecutive soft-start cycles. The controller automatically retries the output every seventh (7th) soft-start cycle.

In addition to determining the off time during a fault condition, the soft-start ramp provides a closed loop controlled ramp of the converter output during startup. Programmability allows the ramp rate to be adjusted for a wide variety of output L-C component values.

The output voltage transient comparators provide a quick response, first strike, approach to output voltage transients. The output voltage is sensed through a resistor divider at the OSNS pin. If an overvoltage condition is detected the HDRV gate drive is shut-off and the LDRV gate drive is turned on until the output is returned to regulation. Similarly, if an output undervoltage condition is sensed the HDRV gate drive goes to 95% duty cycle to pump the output back up quickly. In either case, the PowerGood open drain output pulls low to indicate an output voltage out of regulation condition. The PowerGood output can be daisy-chained to the SS/SD pin or enable pin of other controllers or converters. The transient comparators can be disabled by simply tying the OSNS pin to VDD.

The TPS4002X can be externally synchronized through the ILIM/SYNC pin up to 1.5× the free-running frequency. This allows multiple contollers to be synchronized to eliminate EMI concerns due to input beat frequencies between controllers.

The TPS4002x family of dc-to-dc controllers are designed for non-isolated synchronous buck regulators, providing enhanced operation and design flexability through user programmability.

The TPS4002x utilizes a proprietary Predictive Gate Drive™ technology to minimize the diode conduction losses associated with the high-side and synchronous rectifier N-channel MOSFET transistions. The integrated charge pump with boost circuit provides a regulated 5-V gate drive for both the high side and synchronous rectifier N-channel MOSFETs. The use of the Predictive Gate Drive™ technology and charge pump/boost circuits combine to provide a highly efficient, smaller and less expensive converter.

Design flexibility is provided through user programmability of such functions as: operating frequency, short circuit current detection thresholds, soft-start ramp time, and external synchronization frequency. The operating frequency is programmable using a single resistor over a frequency range of 100 kHz to 1 MHz. Higher operating frequencies yield smaller component values for a given converter power level as well as faster loop closure.

The short circuit current detection is programmable through a single resistor, allowing the short circuit current limit detection threshold to be easily tailored to accommodate different size (RDS(on)) MOSFETs. The short circuit current function provides pulse-by-pulse current limiting during soft-start and short term transient conditions as well as a fault counter to handle longer duration short circuit current conditions. If a fault is detected the controller shuts down for a period of time determined by six (6) consecutive soft-start cycles. The controller automatically retries the output every seventh (7th) soft-start cycle.

In addition to determining the off time during a fault condition, the soft-start ramp provides a closed loop controlled ramp of the converter output during startup. Programmability allows the ramp rate to be adjusted for a wide variety of output L-C component values.

The output voltage transient comparators provide a quick response, first strike, approach to output voltage transients. The output voltage is sensed through a resistor divider at the OSNS pin. If an overvoltage condition is detected the HDRV gate drive is shut-off and the LDRV gate drive is turned on until the output is returned to regulation. Similarly, if an output undervoltage condition is sensed the HDRV gate drive goes to 95% duty cycle to pump the output back up quickly. In either case, the PowerGood open drain output pulls low to indicate an output voltage out of regulation condition. The PowerGood output can be daisy-chained to the SS/SD pin or enable pin of other controllers or converters. The transient comparators can be disabled by simply tying the OSNS pin to VDD.

The TPS4002X can be externally synchronized through the ILIM/SYNC pin up to 1.5× the free-running frequency. This allows multiple contollers to be synchronized to eliminate EMI concerns due to input beat frequencies between controllers.

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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 TPS40020 Synchronous Buck Controller 数据表 (Rev. D) 2007年 5月 31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
更多文献资料 Исходные проекты ll 2011年 5月 13日
用户指南 Using the TPS40021 (TPS40021EVM-001) PR102 (Rev. A) 2003年 11月 18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)。

仿真模型

TPS40021 TINA-TI Transient Reference Design

SLUM174.TSC (270 KB) - TINA-TI Reference Design
仿真模型

TPS40021 TINA-TI Transient Spice Model

SLUM175.ZIP (61 KB) - TINA-TI Spice Model
计算工具

SLUC263 Type III Compensation Calculation Tool

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)
TPS53311 具有 Eco-Mode 和流畅 PWM 的 2.9V 至 6V 输入、3A 同步降压转换器 TPS53313 具有优化轻负载效率的 4.5V 至 16V、6A 同步降压转换器 TPS53316 具有集成开关的高效,5A降压调节器 TPS56121 4.5V 至 14V、15A 同步 SWIFT™ 降压转换器 TPS56221 4.5V 至 14V、25A 同步 SWIFT™ 降压转换器
降压控制器(外部开关)
TPS40007 2.25V-5.5V、300kHz、灌电流/拉电流、预偏置、同步降压控制器 TPS40009 2.25V-5.5V、600kHz、灌电流/拉电流、预偏置、同步降压控制器 TPS40021 具有拉/灌电流能力、频率高达 1MHz 的增强型低输入(2.25V 至 5.5V)同步降压控制器 TPS40040 具有低引脚数的 2.25V 至 5.5V 输入电压、300kHz 同步降压控制器 TPS40041 具有低引脚数的 2.25V 至 5.5V 输入电压、600kHz 同步降压控制器 TPS40055 具有拉/灌电流能力且频率高达 1MHz 的宽输入(8V 至 40V)同步降压控制器 TPS40057 宽输入 (8V-40V)、频率高达 1MHz 的同步降压控制器,带有预偏置的输出驱动/吸入 TPS40075 具有电压前馈的 4.5V 至 28V 同步降压控制器 TPS40077 采用 HTSSOP 封装、具有电压前馈的 4.5V 至 28V 同步降压控制器 TPS40101 具有高级排序功能和输出裕量的 4.5V 至 18V 同步降压控制器 TPS40170 4.5V 至 60V 宽输入同步 PWM 降压控制器 TPS40190 4.5V 至 15V、20A 同步降压控制器 TPS40192 具有电源正常指示功能的 4.5V 至 18V、20A、600kHz 同步降压控制器 TPS40193 具有电源正常指示功能的 4.5V 至 18V、20A、300kHz 同步降压控制器 TPS40195 具有电源正常指示和同步功能的 4.5V 至 20V、20A 同步降压控制器 TPS40200 宽输入非同步降压直流/直流控制器 TPS40303 具有 FSS 的 3V 至 20V、25A、300kHz 同步降压控制器 TPS40304 具有 FSS 的 3V 至 20V、25A、600kHz 同步降压控制器 TPS40305 具有 FSS 的 3V 至 20V、25A、1.2MHz 同步降压控制器 TPS40322 双通道输出或二相同步降压控制器 TPS40400 具有 PMBus™ 且包含遥测功能的 3V 至 20V、30A 同步降压控制器 TPS40422 具有 PMBus 的双输出或多相同步降压控制器 TPS5130 具有 LDO 控制器的 4.5V 至 28V 三路同步降压控制器
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 下载
HTSSOP (PWP) 16 查看选项

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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