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DC/DC 轉換器

TPS62770

現行

採用 WCSP 且具有 360nA Iq 降壓和最高至 15V 升壓的小型單晶片雙解決方案

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產品規格表

TPS62770

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 5.5 Vin (min) (V) 2.5 Vout (max) (V) 15 Vout (min) (V) 1 Features Adaptive/Dynamic Voltage Scaling, Enable, Light load efficiency, Output discharge, Over Current Protection, Soft Start Fixed, Synchronous Rectification, UVLO fixed Control mode DCS-Control Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00000037 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 5.5 Vin (min) (V) 2.5 Vout (max) (V) 15 Vout (min) (V) 1 Features Adaptive/Dynamic Voltage Scaling, Enable, Light load efficiency, Output discharge, Over Current Protection, Soft Start Fixed, Synchronous Rectification, UVLO fixed Control mode DCS-Control Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00000037 Duty cycle (max) (%) 100
DSBGA (YFP) 16 3.24 mm² (— mm × — mm)
  • VIN Range 2.5 V to 5.5 V
  • 370 nA Iq Step-Down Converter
    • 8 Selectable Output Voltages (1.0V to 3.0V)
    • 300 mA Output Current
    • Output Discharge Function
  • Slew Rate Controlled Load Switch with Discharge
    Function
  • Dual Mode Step-Up Converter
    • Load Disconnect
    • Constant Output Voltage Adjustable up to 15 V
      (VFB 0.8 V) / 12 V Fixed
    • LED Current Driver with PWM to Current
      Conversion (max VFB Voltage 200 mV @ D =
      100%)
  • Tiny 16pin 1.58 × 1.58mm WCSP Package 0.4mm
    pitch
  • VIN Range 2.5 V to 5.5 V
  • 370 nA Iq Step-Down Converter
    • 8 Selectable Output Voltages (1.0V to 3.0V)
    • 300 mA Output Current
    • Output Discharge Function
  • Slew Rate Controlled Load Switch with Discharge
    Function
  • Dual Mode Step-Up Converter
    • Load Disconnect
    • Constant Output Voltage Adjustable up to 15 V
      (VFB 0.8 V) / 12 V Fixed
    • LED Current Driver with PWM to Current
      Conversion (max VFB Voltage 200 mV @ D =
      100%)
  • Tiny 16pin 1.58 × 1.58mm WCSP Package 0.4mm
    pitch

The TPS62770 is a tiny power solution for wearable applications including a 370nA ultra low Iq step-down converter, a slew rate controlled load switch and a dual mode step-up converter. The output voltage of the step-down converter can be selected with three VSEL pins between 1.0 V, 1.05 V, 1.1 V, 1.2 V, 1.8 V, 1.9 V, 2.0 V and 3.0 V. The output voltage can be changed during operation. In shutdown mode, the output of the step-down converter is pulled to GND. The integrated load switch is internally connected to the output of the step-down converter and features slew rate control during turn on phase. Once turned off, its output is connected to GND.

The dual mode step-up converter can generate a constant output voltage up to 15 V, such as PMOLED supply; or, a constant output current, such as LED back light supply. The output voltage can be adjusted up to 15 V with external resistors, or set to fixed 12 V by connecting the FB pin to VIN. The device features an internal over voltage protection of 17.7 V in case the FB node is left open or tight to GND. It includes an internal rectifier and load disconnect function. When used as constant output current driver, the device offers a PWM to analog converter to scale down the reference voltage according to the duty cycle of the PWM signal.

The device is available in a small 16pin 0.4mm pitch WCSP package.

The TPS62770 is a tiny power solution for wearable applications including a 370nA ultra low Iq step-down converter, a slew rate controlled load switch and a dual mode step-up converter. The output voltage of the step-down converter can be selected with three VSEL pins between 1.0 V, 1.05 V, 1.1 V, 1.2 V, 1.8 V, 1.9 V, 2.0 V and 3.0 V. The output voltage can be changed during operation. In shutdown mode, the output of the step-down converter is pulled to GND. The integrated load switch is internally connected to the output of the step-down converter and features slew rate control during turn on phase. Once turned off, its output is connected to GND.

The dual mode step-up converter can generate a constant output voltage up to 15 V, such as PMOLED supply; or, a constant output current, such as LED back light supply. The output voltage can be adjusted up to 15 V with external resistors, or set to fixed 12 V by connecting the FB pin to VIN. The device features an internal over voltage protection of 17.7 V in case the FB node is left open or tight to GND. It includes an internal rectifier and load disconnect function. When used as constant output current driver, the device offers a PWM to analog converter to scale down the reference voltage according to the duty cycle of the PWM signal.

The device is available in a small 16pin 0.4mm pitch WCSP package.
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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 TPS62770 Multi-Rail DC/DC Converter For Wearable Applications datasheet (Rev. B) PDF | HTML 2016/4/11
應用說明 Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 2022/5/23
白皮書 Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies 2019/10/14
類比設計期刊 Methods of output-voltage adjustment for DC/DC converters 2019/6/14
類比設計期刊 Understanding 100% mode in low-power DC/DC converters 2018/6/22
類比設計期刊 Testing tips for applying external power to supply outputs without an input voltage 2016/10/24

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

TPS62770EVM-734 — TPS62770 多軌 DC/DC 轉換器評估模組

TPS62770EVM-734 的設計旨在幫助使用者輕鬆評估及測試 TPS62770 多軌 DC/DC 轉換器的運作及功能。該 EVM 提供兩套獨立功率級解決方案，不僅針對小型設計進行最佳化，同時具備完整功能集。該功率級提供雙通道輸出，輸入電壓範圍為 2.0V 至 5.5V。降壓軌可在 1.0V 和 3.3V 之間進行數位調整。升壓軌可高達 15V。

使用指南: PDF
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模擬型號

TPS62770 PSpice Unencrypted Transient Model (Rev. A)

SLVMBI1A.ZIP (280 KB) - PSpice 模型
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計算工具

SLVC780 — Design Tool for Output Voltage Adjustment Using a DAC

Calculator tool to adjust the power supply's output voltage with an analog input voltage
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參考設計

PMP21884 — 適用穿戴式裝置且具電池充電的小巧型超低 IQ DC/DC 電源供應參考設計

這是一款適用於智慧型手錶及健身追蹤裝置的高度整合電源供應參考設計，可實現體積超小（48 平方公釐）的超低 IQ。電源供應器包含七個電源軌，其中包括電池充電器、LDO、DC/DC 降壓轉換器，和適用心率監控器、AFE LED 驅動器電源或 PMOLED 偏壓的整合式升壓轉換器。
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參考設計

PMP9792 — 適合可穿式應用的多軌、低 IQ 電源參考設計

智慧型手環等穿戴式應用提供兩個主要電源軌，可為無線 MCU、感測器及顯示器供電。這類尺寸非常小巧，因此需要盡可能採用最小的解決方案尺寸。此參考設計介紹以 TPS62770 多軌 DC/DC 轉換器、CC2650 無線 MCU 及 PMOLED 顯示器為基礎的完整解決方案。
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DSBGA (YFP) 16 Ultra Librarian
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