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AC/DC & DC/DC converters (integrated FET)

TPS62745

現行

具 VSEL 和輸入電壓開關的 3.3V-10V 輸入、300mA 超低 Iq 降壓轉換器

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TPS629203 現行 採用 SOT-583 封裝的 3-V 至 17-V、0.3-A、低 IQ 同步降壓轉換器 Improved efficiency, smaller size and lower IQ.

TPS62745

現行
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產品詳細資料

Iout (max) (A) 0.3 Vin (min) (V) 3.3 Vin (max) (V) 10 Topology Buck Type Converter Switching frequency (min) (kHz) 2500 Switching frequency (max) (kHz) 2500 Features Adaptive/Dynamic Voltage Scaling, Enable, Light Load Efficiency, Output discharge, Power good, Soft Start Fixed, Synchronous Rectification Control mode Constant on-time (COT), DCS-Control Vout (min) (V) 1.8 Vout (max) (V) 3.3 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0000004
Iout (max) (A) 0.3 Vin (min) (V) 3.3 Vin (max) (V) 10 Topology Buck Type Converter Switching frequency (min) (kHz) 2500 Switching frequency (max) (kHz) 2500 Features Adaptive/Dynamic Voltage Scaling, Enable, Light Load Efficiency, Output discharge, Power good, Soft Start Fixed, Synchronous Rectification Control mode Constant on-time (COT), DCS-Control Vout (min) (V) 1.8 Vout (max) (V) 3.3 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0000004
WSON (DSS) 12 6 mm² 3 x 2
  • Input Voltage Range VIN from 3.3 V to 10 V
  • Typical 400 nA Quiescent Current
  • Up to 90% efficiency with load currents >15 µA
  • Up to 300 mA Output Current
  • RF Friendly DCS-Control™
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages from
    • 1.8 V to 3.3 V (TPS62745)
    • 1.3 V to 2.8 V (TPS627451)
  • Integrated input voltage switch
  • Integrated Discharge Function at VOUT
  • Open Drain Power Good Output
  • Operates with a Tiny 3.3 µH or 4.7 µH Inductor
  • Small 3 mm × 2 mm WSON Package
  • Input Voltage Range VIN from 3.3 V to 10 V
  • Typical 400 nA Quiescent Current
  • Up to 90% efficiency with load currents >15 µA
  • Up to 300 mA Output Current
  • RF Friendly DCS-Control™
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages from
    • 1.8 V to 3.3 V (TPS62745)
    • 1.3 V to 2.8 V (TPS627451)
  • Integrated input voltage switch
  • Integrated Discharge Function at VOUT
  • Open Drain Power Good Output
  • Operates with a Tiny 3.3 µH or 4.7 µH Inductor
  • Small 3 mm × 2 mm WSON Package

The TPS62745 is a high efficiency ultra low power synchronous step down converter optimized for low power wireless applications. It provides a regulated output voltage consuming only 400-nA quiescent current. The device operates from two rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell alkaline batteries. The input voltage range up to 10 V allows also operation from a USB port and thin-film solar modules. The output voltage is set with four VSEL pins between 1.8 V and 3.3 V for TPS62745 or 1.3 V and 2.8 V for TPS627451. TPS62745 features low output ripple voltage and low noise with a small output capacitor. An internal input voltage switch controlled by pin EN_VIN_SW connects the supply voltage to pin VIN_SW. The switch is intended to be used for an external voltage divider, scaling down the input voltage for an external ADC. The switch is automatically opened when the supply voltage is below the undervoltage lockout threshold. The TPS62745 is available in a small 12 pin 3 mm × 2 mm WSON package.

The TPS62745 is a high efficiency ultra low power synchronous step down converter optimized for low power wireless applications. It provides a regulated output voltage consuming only 400-nA quiescent current. The device operates from two rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell alkaline batteries. The input voltage range up to 10 V allows also operation from a USB port and thin-film solar modules. The output voltage is set with four VSEL pins between 1.8 V and 3.3 V for TPS62745 or 1.3 V and 2.8 V for TPS627451. TPS62745 features low output ripple voltage and low noise with a small output capacitor. An internal input voltage switch controlled by pin EN_VIN_SW connects the supply voltage to pin VIN_SW. The switch is intended to be used for an external voltage divider, scaling down the input voltage for an external ADC. The switch is automatically opened when the supply voltage is below the undervoltage lockout threshold. The TPS62745 is available in a small 12 pin 3 mm × 2 mm WSON package.
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類型 標題 日期
* Data sheet TPS62745 Dual-cell Ultra Low IQ Step Down Converter for Low Power Wireless Applications datasheet (Rev. A) PDF | HTML 2015年 6月 10日
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 2022年 5月 23日
EVM User's guide TPS62745 Buck Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 2021年 5月 26日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
White paper Extending Battery Life in Smart E-Locks (Rev. A) 2020年 6月 4日
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies 2019年 10月 14日
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 2019年 6月 14日
Analog Design Journal Understanding 100% mode in low-power DC/DC converters 2018年 6月 22日
Analog Design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold 2017年 10月 24日
Technical article Never lose your luggage again with a smart tracker design PDF | HTML 2017年 10月 20日
Technical article Power topology choices for power-hungry devices PDF | HTML 2017年 8月 9日
Technical article Increasing battery life in IoT devices PDF | HTML 2017年 5月 5日
Technical article IoT is making buildings greener and more intelligent. Value versus affordability PDF | HTML 2017年 1月 4日
Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 2016年 10月 24日
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 2015年 10月 30日

設計與開發

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開發板

TPS62745EVM-622 — 超低 Iq、廣泛 VIN 降壓轉換器評估模組

The TPS62745EVM-622 is designed to help the user easily evaluate and test the operation and functionality of the TPS62745. The EVM converts a 3.3-V to 10-V input voltage to a regulated output voltage that is set between 1.8 V and 3.3 V at up to 300 mA. The TPS62745 also includes an integrated input (...)

使用指南: PDF | HTML
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模擬型號

TPS62745 PSpice Unencrypted Transient Model (Rev. A)

SLVMB11A.ZIP (91 KB) - PSpice Model
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Design guide: PDF
電路圖: PDF
參考設計

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This reference design demonstrates an ultra-low-power capacitive touch panel based on a single MSP430™ microcontroller (MCU) with CapTIvate™ technology. The use of self and mutual capacitance technology enables multifunctional capacitive touch panels (buttons and proximity sensor) for (...)
Design guide: PDF
電路圖: PDF
參考設計

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This reference design is built to enable multiple room comfort control in connected heating, ventilation and air conditioning (HVAC). Sensing temperature, humidity and pressure allows independent monitoring and air-flow adjustment in each zone. This reference design converts a constant air (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-010018 — 適用於低功耗應用的隔離式電源和數據介面參考設計

This reference design provides power and data isolation for low and ultra-low power applications. Generating isolated and non-isolated power rails with a high efficiency and containing a power efficient isolated data interface for three forward- plus one reverse-direction channels. Targeted (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDC-DSSS868WMBUS-DC — 適用於 wM-Bus T-/C-模式和 DSSS 編碼數據封包 @ 868.95MHz 的電池供電數據收集器參考設計

TIDC-DSSS868WMBUS-DC enables data collectors with optimized firmware for receiving wireless M-Bus (wM-Bus) packets in frequent transmission (T-) and compact (C-) modes at 868.95 MHz. For improved range, a customized direct sequence spread spectrum (DSSS)-coded packet reception is also supported. (...)
Design guide: PDF
電路圖: PDF
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