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DC/DC 轉換器

TPS62355

現行

具有 I2C 用於動態電壓調節的 1A、3-MHz 降壓轉換器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但針腳輸出與所比較的裝置不同。
TPS62861 現行 具有 I2C/VSEL 介面的 1.75 V 至 5.5 V 輸入、1 A 超低 IQ 降壓轉換器 Lower Iq of 2.3 uA, smaller solution size and broader output voltage range (0.4 V to 1.98 V)

TPS62355

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 0.8 Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 1.5375 Vout (min) (V) 0.75 Features Adaptive/Dynamic Voltage Scaling, Enable, Frequency synchronization, I2C/PMBus, Light Load Efficiency, Light load efficiency, Output discharge, Synchronous Rectification Control mode Voltage mode Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.000028 Duty cycle (max) (%) 80
Rating Catalog Topology Buck Iout (max) (A) 0.8 Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 1.5375 Vout (min) (V) 0.75 Features Adaptive/Dynamic Voltage Scaling, Enable, Frequency synchronization, I2C/PMBus, Light Load Efficiency, Light load efficiency, Output discharge, Synchronous Rectification Control mode Voltage mode Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.000028 Duty cycle (max) (%) 80
VSON (DRC) 10 9 mm² (3 mm × 3 mm)
  • 88% Efficiency at 3-MHz Operation
  • 800-mA Output Current at VI = 2.7 V
  • 3-MHz Fixed Frequency Operation
  • Best in Class Load and Line Transient
  • Complete 1-mm Component Profile Solution
  • ±2% PWM DC Voltage Accuracy
  • 35-ns Minimum On-Time
  • Efficiency Optimized Power-Save Mode (Light PFM)
  • Transient Optimized Power-Save Mode (Fast PFM)
  • 28-µA Typical Quiescent Current
  • I2C Compatible Interface up to 3.4 Mbps
  • Pin-Selectable Output Voltage
  • Synchronizable On the Fly to External Clock Signal
  • Available in a 10-Pin QFN (3 × 3 mm) and 12-Pin NanoFree™ (CSP) Packaging
  • APPLICATIONS
    • SmartReflex™ Compliant Power Supply
    • Split Supply DSPs and µP Solutions
      OMAP™, XSCALE™
    • Cell Phones, Smart-Phones
    • PDAs, Pocket PCs
    • Digital Cameras
    • Micro DC-DC Converter Modules

NanoFree, SmartReflex, OMAP, PowerPAD Is a trademark of Texas Instruments.
XSCALE is a trademark of Intel Corporation.
I2C is a trademark of Philips Corporation.
  • 88% Efficiency at 3-MHz Operation
  • 800-mA Output Current at VI = 2.7 V
  • 3-MHz Fixed Frequency Operation
  • Best in Class Load and Line Transient
  • Complete 1-mm Component Profile Solution
  • ±2% PWM DC Voltage Accuracy
  • 35-ns Minimum On-Time
  • Efficiency Optimized Power-Save Mode (Light PFM)
  • Transient Optimized Power-Save Mode (Fast PFM)
  • 28-µA Typical Quiescent Current
  • I2C Compatible Interface up to 3.4 Mbps
  • Pin-Selectable Output Voltage
  • Synchronizable On the Fly to External Clock Signal
  • Available in a 10-Pin QFN (3 × 3 mm) and 12-Pin NanoFree™ (CSP) Packaging
  • APPLICATIONS
    • SmartReflex™ Compliant Power Supply
    • Split Supply DSPs and µP Solutions
      OMAP™, XSCALE™
    • Cell Phones, Smart-Phones
    • PDAs, Pocket PCs
    • Digital Cameras
    • Micro DC-DC Converter Modules

NanoFree, SmartReflex, OMAP, PowerPAD Is a trademark of Texas Instruments.
XSCALE is a trademark of Intel Corporation.
I2C is a trademark of Philips Corporation.

The TPS6235x device is a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications. Intended for low-power applications, the TPS6235x supports up to 800-mA load current and allows the use of small, low cost inductors and capacitors.

The device is ideal for mobile phones and similar portable applications powered by a single-cell Li-Ion battery. With an output voltage range adjustable via I2C interface down to 0.6 V, the device supports low-voltage DSPs and processors core power supplies in smart-phones, PDAs, and handheld computers.

The TPS6235x operates at 3-MHz fixed switching frequency and enters the efficiency optimized power-save mode operation at light load currents to maintain high efficiency over the entire load current range. In the shutdown mode, the current consumption is reduced to less than 2 µA.

The serial interface is compatible with Fast/Standard and High-Speed mode I2C specification allowing transfers at up to 3.4 Mbps. This communication interface is used for dynamic voltage scaling with voltage steps down to 12.5 mV, for reprogramming the mode of operation (Light PFM, Fast PFM or Forced PWM) or disable/enabling the output voltage.

The TPS6235x device is a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications. Intended for low-power applications, the TPS6235x supports up to 800-mA load current and allows the use of small, low cost inductors and capacitors.

The device is ideal for mobile phones and similar portable applications powered by a single-cell Li-Ion battery. With an output voltage range adjustable via I2C interface down to 0.6 V, the device supports low-voltage DSPs and processors core power supplies in smart-phones, PDAs, and handheld computers.

The TPS6235x operates at 3-MHz fixed switching frequency and enters the efficiency optimized power-save mode operation at light load currents to maintain high efficiency over the entire load current range. In the shutdown mode, the current consumption is reduced to less than 2 µA.

The serial interface is compatible with Fast/Standard and High-Speed mode I2C specification allowing transfers at up to 3.4 Mbps. This communication interface is used for dynamic voltage scaling with voltage steps down to 12.5 mV, for reprogramming the mode of operation (Light PFM, Fast PFM or Forced PWM) or disable/enabling the output voltage.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 800-mA 3-MHz Synchronous Step-Down Converter With I2C(TM) Compatible Interface datasheet (Rev. E) 2008/4/15
應用說明 QFN and SON PCB Attachment (Rev. C) PDF | HTML 2023/12/6
類比設計期刊 Methods of output-voltage adjustment for DC/DC converters 2019/6/14
應用說明 Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018/12/11
類比設計期刊 Understanding 100% mode in low-power DC/DC converters 2018/6/22
應用說明 Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 2017/11/29
類比設計期刊 Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold 2017/10/24
類比設計期刊 Testing tips for applying external power to supply outputs without an input voltage 2016/10/24
應用說明 Basic Calculation of a Buck Converter's Power Stage (Rev. B) PDF | HTML 2015/8/17
類比設計期刊 Five steps to a great PCB layout for a step-down converter 2015/1/29
應用說明 Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) 2012/1/13
類比設計期刊 IQ: What it is, what it isn’t, and how to use it 2011/6/17

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