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TPS56428

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具有高级 Eco-Mode™ 的 4.5V 至 18V 输入，4A 同步降压转换器

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TPS564242 正在供货 采用 SOT-563 封装的 3V 至 16V 输入电压、4A ECO 模式同步降压转换器 Upgraded with higher efficiency, higher switching frequency, and smaller package

TPS56428

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产品详情

Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Enable, Light Load Efficiency, Power good, Soft Start Fixed, Synchronous Rectification Control mode D-CAP2 Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00025 Duty cycle (max) (%) 65
Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Enable, Light Load Efficiency, Power good, Soft Start Fixed, Synchronous Rectification Control mode D-CAP2 Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00025 Duty cycle (max) (%) 65
VQFN (RHL) 14 12.25 mm² (3.5 mm × 3.5 mm) HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)
  • D-CAP2™ Mode at 650kHz Switching for Fast
    Transient Response, Ceramic Capacitor Support
  • VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.6 V to 7.0 V
  • Advanced Eco-mode for High Light Load
    Efficiency
  • Integrated FETs Optimized for Lower Duty Cycle
    – 68 mΩ (High Side) and 37 mΩ (Low Side)
  • Shutdown Current Less Than 10 µA
  • 1% Initial Reference Voltage Accuracy
  • Soft Start with Pre-Bias Output Support
  • Cycle By Cycle Over Current Limit
  • Power Good Output
  • Fixed Soft Start : 1.0ms
  • D-CAP2™ Mode at 650kHz Switching for Fast
    Transient Response, Ceramic Capacitor Support
  • VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.6 V to 7.0 V
  • Advanced Eco-mode for High Light Load
    Efficiency
  • Integrated FETs Optimized for Lower Duty Cycle
    – 68 mΩ (High Side) and 37 mΩ (Low Side)
  • Shutdown Current Less Than 10 µA
  • 1% Initial Reference Voltage Accuracy
  • Soft Start with Pre-Bias Output Support
  • Cycle By Cycle Over Current Limit
  • Power Good Output
  • Fixed Soft Start : 1.0ms

The TPS56428 is a D-CAP2 mode synchronous buck converter which is optimized for various power bus regulation needs with a cost effective, low component count, low standby current solution.

The D-CAP2 mode control provides a fast transient response with no external compensation components. This adaptive on-time control supports seamless transition between PWM mode at higher load conditions and advanced Eco-mode operation at light loads. Advanced Eco-mode™ maintains higher efficiency during lighter load conditions than traditional skip mode.

The TPS56428 also has a proprietary circuit to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18 V VIN input and its output voltage can be programmed between 0.6V and 7.0V. The device also features a fixed 1-ms soft start and a power-good output.

The TPS56428 is available in 8-pin SOIC-8 and 14-pin QFN packages designed to operate over the ambient temperature range of –40°C to 85°C.

The TPS56428 is a D-CAP2 mode synchronous buck converter which is optimized for various power bus regulation needs with a cost effective, low component count, low standby current solution.

The D-CAP2 mode control provides a fast transient response with no external compensation components. This adaptive on-time control supports seamless transition between PWM mode at higher load conditions and advanced Eco-mode operation at light loads. Advanced Eco-mode™ maintains higher efficiency during lighter load conditions than traditional skip mode.

The TPS56428 also has a proprietary circuit to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18 V VIN input and its output voltage can be programmed between 0.6V and 7.0V. The device also features a fixed 1-ms soft start and a power-good output.

The TPS56428 is available in 8-pin SOIC-8 and 14-pin QFN packages designed to operate over the ambient temperature range of –40°C to 85°C.
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TPS56528 正在供货 具有高级 Eco-Mode™ 的 4.5V 至 18V 输入，5A 同步降压转换器 This product offers higher current (5 A).

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* 数据表 TPS56428 4.5-V to 18-V Input, 4-A Sync. Step-Down Converter with Advanced Eco-mode™ 数据表 (Rev. B) PDF | HTML 2015-1-22

设计与开发

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评估板

TPS56428EVM-534 — TPS56428 直流/直流降压转换器评估模块

The Texas Instruments TPS56428EVM-534 evaluation module (EVM) helps designers evaluate the performance of the TPS56428 4.5V to 18V Input, 4A Synchronous Step-Down Converter with Eco-Mode.
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仿真模型

TPS56428 PSpice Transient Model

SLVM854.ZIP (69 KB) - PSpice 模型
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RHL) 14 Ultra Librarian
HSOIC (DDA) 8 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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