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DC/DC 轉換器

TPS61291

現行

具 15nA 旁路運作的低 Iq 升壓轉換器

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產品規格表

TPS61291

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Boost Vin (max) (V) 5 Vin (min) (V) 0.9 Vout (max) (V) 3.3 Vout (min) (V) 2.5 Switch current limit (typ) (A) 1 Features Pass-through mode, Synchronous rectification Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000005 Duty cycle (max) (%) 90
Rating Catalog Topology Boost Vin (max) (V) 5 Vin (min) (V) 0.9 Vout (max) (V) 3.3 Vout (min) (V) 2.5 Switch current limit (typ) (A) 1 Features Pass-through mode, Synchronous rectification Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000005 Duty cycle (max) (%) 90
WSON (DRV) 6 4 mm² (2 mm × 2 mm)
  • Input Voltage Range 0.9V to 5V
  • Startup Voltage 1.5V at 20mA Load
  • Pin Selectable Output Voltages:
    3.3V, 3V, 2.5V
  • 15nA typical Quiescent Current in
    Bypass Mode
  • 5.7µA typical Quiescent Current in
    Boost Mode
  • Bypass Switch from VIN to VOUT
  • IOUT > 200mA at 3.3V VOUT,
    VIN = 1.8V
  • Internal Feedback Divider Disconnect
    (Bypass Mode)
  • Controlled Bypass Transition Prevents
    Reverse Current into Battery
  • Power-Save Mode at Light Loads
  • Overtemperature Protection
  • Redundant Overvoltage Protection
  • Small 2mm × 2mm SON 6-pin package
  • Input Voltage Range 0.9V to 5V
  • Startup Voltage 1.5V at 20mA Load
  • Pin Selectable Output Voltages:
    3.3V, 3V, 2.5V
  • 15nA typical Quiescent Current in
    Bypass Mode
  • 5.7µA typical Quiescent Current in
    Boost Mode
  • Bypass Switch from VIN to VOUT
  • IOUT > 200mA at 3.3V VOUT,
    VIN = 1.8V
  • Internal Feedback Divider Disconnect
    (Bypass Mode)
  • Controlled Bypass Transition Prevents
    Reverse Current into Battery
  • Power-Save Mode at Light Loads
  • Overtemperature Protection
  • Redundant Overvoltage Protection
  • Small 2mm × 2mm SON 6-pin package

The TPS61291 is a boost converter with pin selectable output voltages and an integrated bypass mode. In bypass operation, the device provides a direct path from the input to the system and allows a low power micro controller (MCU) such as the MSP430 to operate directly from a single 3V Li-MnO2 battery or dual alkaline battery cells.

In bypass mode the integrated feedback divider network for boost mode operation is disconnected from the output and the quiescent current consumption drops down to only 15nA (typical).

In boost mode the device provides a minimum output current of 200mA at 3.3V VOUT from 1.8V VIN. The boost mode is used for system components which require a regulated supply voltage and cannot directly operate from the input source. The boost converter is based on a current-mode controller using synchronous rectification to obtain maximum efficiency and consumes typically 5.7µA from the output. During startup of the boost converter, the VSEL pin is read out and the integrated feedback network sets the output voltage to 2.5V, 3V or 3.3V.

Bypass mode or boost mode operation is controlled by the system via the EN/BYP pin.

The device integrates an enhanced bypass mode control to prevent charge, stored in the output capacitor during boost mode operation, from flowing back to the input and charging the battery.

The device is packaged in a small 6-pin SON package (DRV) measuring 2.0mm × 2.0mm × 0.75mm.

The TPS61291 is a boost converter with pin selectable output voltages and an integrated bypass mode. In bypass operation, the device provides a direct path from the input to the system and allows a low power micro controller (MCU) such as the MSP430 to operate directly from a single 3V Li-MnO2 battery or dual alkaline battery cells.

In bypass mode the integrated feedback divider network for boost mode operation is disconnected from the output and the quiescent current consumption drops down to only 15nA (typical).

In boost mode the device provides a minimum output current of 200mA at 3.3V VOUT from 1.8V VIN. The boost mode is used for system components which require a regulated supply voltage and cannot directly operate from the input source. The boost converter is based on a current-mode controller using synchronous rectification to obtain maximum efficiency and consumes typically 5.7µA from the output. During startup of the boost converter, the VSEL pin is read out and the integrated feedback network sets the output voltage to 2.5V, 3V or 3.3V.

Bypass mode or boost mode operation is controlled by the system via the EN/BYP pin.

The device integrates an enhanced bypass mode control to prevent charge, stored in the output capacitor during boost mode operation, from flowing back to the input and charging the battery.

The device is packaged in a small 6-pin SON package (DRV) measuring 2.0mm × 2.0mm × 0.75mm.
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技術文件

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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 TPS61291 Low Iq Boost Converter with Bypass Operation datasheet (Rev. A) PDF | HTML 2014/9/23
應用說明 QFN and SON PCB Attachment (Rev. C) PDF | HTML 2023/12/6
應用說明 Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 2022/10/28
應用說明 Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018/12/11
應用說明 Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 2017/6/15
應用說明 Calculating and Measuring the No Load Input Current of the Boost Converter 2016/9/23
技術文章 How to use boost converters in wireless sensor nodes PDF | HTML 2015/10/6
類比設計期刊 Accurately measuring efficiency of ultralow-IQ devices 2014/1/22
類比設計期刊 IQ: What it is, what it isn’t, and how to use it 2011/6/17
應用說明 Minimizing Ringing at the Switch Node of a Boost Converter 2006/9/15

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS61291EVM-569 — 具有旁路模式的低 IQ 升壓轉換器評估模組

TPS61291EVM-569 有助於評估具備旁路模式之裝置的 TPS61291 低 IQ 升壓轉換器。  該裝置輸出使用者可選的 2.5V、3V 或 3.3V 輸出電壓。  可用輸出電流取決於輸入電壓與輸出電壓，但在大多數應用中通常約為 200mA。

使用指南: PDF
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模擬型號

Unencrypted TPS61291 PSpice Transient Model Package (Rev. A)

SLVMAD5A.ZIP (22 KB) - PSpice 模型
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參考設計

TIDA-00484 — 可讓鈕釦電池壽命長達 10 年以上且適用於 Sub-1GHz 星狀網路的濕度及溫度感測器節點

此參考設計使用我們的奈米功率系統計時器、升壓轉換器、SimpleLink™ 超低功耗 Sub-1 GHz 無線微控制器 (MCU) 平台和濕度感測技術，以展示占空比感測器終端節點的超低功耗方法，從而實現了極長的電池壽命。此設計包含系統設計技巧、詳細測試結果和關於快速啟動和執行設計的資訊。

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參考設計

TIDA-01469 — 採用無線震動感測器並支援預防性維護的馬達監控參考設計

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參考設計

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參考設計

TIDM-ULTRASONIC-FLOW-TDC — 使用時間轉數位轉換器進行超音波水錶設計

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WSON (DRV) 6 Ultra Librarian
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