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AC/DC 和 DC/DC 轉換器 (整合式 FET)

TPS61021A

現行

具有 0.5V 超低輸入電壓的 3A 升壓轉換器

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產品規格表

TPS61021A

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 0.5 Vin (max) (V) 4.4 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2000 Features Bypass Mode Pass-through Mode, Enable, Light Load Efficiency, Load Disconnect, Synchronous Rectification Vout (min) (V) 1.8 Vout (max) (V) 4 Iq (typ) (µA) 17 Duty cycle (max) (%) 90 Switch current limit (typ) (A) 4.3
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 0.5 Vin (max) (V) 4.4 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2000 Features Bypass Mode Pass-through Mode, Enable, Light Load Efficiency, Load Disconnect, Synchronous Rectification Vout (min) (V) 1.8 Vout (max) (V) 4 Iq (typ) (µA) 17 Duty cycle (max) (%) 90 Switch current limit (typ) (A) 4.3
WSON (DSG) 8 4 mm² 2 x 2
  • Input Voltage Range: 0.5 V to 4.4 V
  • 0.9 V Minimum Input Voltage for Startup
  • Output Voltage Setting Range: 1.8 V to 4.0 V
  • 91% Efficiency at VIN = 2.4 V, VOUT = 3.3 V and
    IOUT = 1.5 A
  • 2.0-MHz Switching Frequency
  • IOUT > 1.5 A at VOUT = 3.3 V when VIN > 1.8 V
  • 17-µA Typical Quiescent Current
  • ±2.5% Reference Voltage Accuracy over –40°C to
    125°C
  • PFM Operation Mode at Light Load
  • True Disconnection Between Input and Output
    During Shutdown
  • Output Over Voltage Protection
  • Output Short Circuit Protection
  • Thermal Shutdown Protection
  • 2-mm × 2-mm WSON Package
  • Input Voltage Range: 0.5 V to 4.4 V
  • 0.9 V Minimum Input Voltage for Startup
  • Output Voltage Setting Range: 1.8 V to 4.0 V
  • 91% Efficiency at VIN = 2.4 V, VOUT = 3.3 V and
    IOUT = 1.5 A
  • 2.0-MHz Switching Frequency
  • IOUT > 1.5 A at VOUT = 3.3 V when VIN > 1.8 V
  • 17-µA Typical Quiescent Current
  • ±2.5% Reference Voltage Accuracy over –40°C to
    125°C
  • PFM Operation Mode at Light Load
  • True Disconnection Between Input and Output
    During Shutdown
  • Output Over Voltage Protection
  • Output Short Circuit Protection
  • Thermal Shutdown Protection
  • 2-mm × 2-mm WSON Package

The TPS61021A provides a power supply solution for portable or smart devices powered by alkaline, NiMH, Li-Mn, or Li-ion batteries. The TPS61021A is capable of outputting 3.3-V voltage and 1.5-A current from a battery discharged to as low as 1.8 V. Capable of operating with 0.5-V input voltage enables the TPS61021A to extend the battery run time.

The TPS61021A operates at 2-MHz switching frequency at heavy load and enters power-save mode at light load to maintain high efficiency over the entire load current range. The device only consumes a 17-µA quiescent current from VOUT in light load condition. During shutdown, the load is completely disconnected from the input. In addition, The TPS61021A provides 4.35-V output overvoltage protection, output short circuit protection, and thermal shutdown protection.

The TPS61021A offers a very small solution size due to low count of external components. It allows the use of small inductors and output capacitors with the 2-MHz switching frequency.

The TPS61021A is available in 2.0-mm × 2.0-mm WSON package.

The TPS61021A provides a power supply solution for portable or smart devices powered by alkaline, NiMH, Li-Mn, or Li-ion batteries. The TPS61021A is capable of outputting 3.3-V voltage and 1.5-A current from a battery discharged to as low as 1.8 V. Capable of operating with 0.5-V input voltage enables the TPS61021A to extend the battery run time.

The TPS61021A operates at 2-MHz switching frequency at heavy load and enters power-save mode at light load to maintain high efficiency over the entire load current range. The device only consumes a 17-µA quiescent current from VOUT in light load condition. During shutdown, the load is completely disconnected from the input. In addition, The TPS61021A provides 4.35-V output overvoltage protection, output short circuit protection, and thermal shutdown protection.

The TPS61021A offers a very small solution size due to low count of external components. It allows the use of small inductors and output capacitors with the 2-MHz switching frequency.

The TPS61021A is available in 2.0-mm × 2.0-mm WSON package.
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類型 標題 日期
* Data sheet TPS61021A 3-A Boost Converter with 0.5-V Ultra Low Input Voltage datasheet PDF | HTML 2016年 6月 1日
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 2023年 12月 6日
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 2022年 10月 28日
Application note Measuring and Understanding the Output Voltage Ripple of a Boost Converter PDF | HTML 2021年 2月 22日
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018年 12月 11日
Technical article How energy harvesting can extend the life of your fault indicator on the grid PDF | HTML 2017年 10月 18日
Application note Single LED Driver in AA Battery-Powered Systems 2017年 8月 25日
Application note Feedforward Capacitor Makes Boost Converter Fast and Stable 2016年 11月 2日
User guide TPS61021A-PWR723 Evaluation Module (Rev. A) 2016年 6月 16日
Analog Design Journal Design considerations for a resistive feedback divider in a DC/DC converter 2012年 4月 26日
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs 2011年 9月 19日
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 2011年 6月 17日
Application note Minimizing Ringing at the Switch Node of a Boost Converter 2006年 9月 15日

設計與開發

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開發板

TPS61021EVM-723 — 適用於 TPS61021A 的升壓轉換器評估模組

The TPS61021A provides a power supply solution for portable devices and IoT devices powered by alkaline battery or LiMn battery. The TPS61021A supports up to 1.5A load current from a battery discharged as low as 1.8V. The TPS61021A operates at a regulated 2.0-MHz switching frequency and enters (...)
使用指南: PDF
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模擬型號

TPS61021A Unencrypted PSpice Transient Model Package (Rev. B)

SLVMBI5B.ZIP (97 KB) - PSpice Model
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參考設計

TIDA-00998 — 適用於高架故障指示燈的能源採集和故障指示燈子系統參考設計

此參考設計展示了使用輔助電池或超級電容器，並從電流變壓器 (CT) 或太陽能電池收集能源以延長主要電池壽命的多種架構。最佳電源管理是利用有效率的 LED 驅動器來驅動 LED 串聯或並聯串，以控制強度實現一致的 360° 可見度。
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01385 — 適用於故障指示燈且具備超級電容器的比流器能源採集參考設計

Power management for the energy harvesting, energy buffering and back-up power is a key challenge in the fault indicator design. The TIDA-01385 introduces a circuit about harvesting energy from a current transformer for the system load of a fault indicator while storing the extra energy in a super (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01574 — 適用於必須外接電源的自動調溫器的功率級參考設計

TIDA-01574 is a reference design for high-efficiency power stealing for smart thermostats and other building automation equipment. In general, power stealing enables to extend battery life of Wi-Fi enabled smart thermostats by drawing power from 24-V AC when the HVAC load is off. This (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01387 — 採用 LiSoCL2 電池且適用於 GPRS 數據機的電源參考設計

This design demonstrates how to power GPRS modems in smart meters using LiSoCL2 batteries. GPRS modems require peak current of up to 2A during transmission. This design reduces the peak load requirements on the battery by using the TPS61021A boost converter and a 20F super capacitor to provide the (...)
Design guide: PDF
電路圖: PDF
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