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線性與低壓差 (LDO) 穩壓器

TPS7B68-Q1

現行

含 WD 的車用 500-mA、無電池 (40-V)、高 PSRR、低 IQ、低壓降電壓穩壓器

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產品規格表

TPS7B68-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Vin (max) (V) 40 Vin (min) (V) 4 Iout (max) (A) 0.5 Output options Fixed Output Vout (max) (V) 5, 5.5 Vout (min) (V) 0, 3.3 Fixed output options (V) 3.3, 5 PSRR at 100 KHz (dB) 55 Iq (typ) (mA) 0.019 Features Enable, Power good, Watchdog timer Thermal resistance θJA (°C/W) 38 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 150, 350 Operating temperature range (°C) -40 to 125
Rating Automotive Vin (max) (V) 40 Vin (min) (V) 4 Iout (max) (A) 0.5 Output options Fixed Output Vout (max) (V) 5, 5.5 Vout (min) (V) 0, 3.3 Fixed output options (V) 3.3, 5 PSRR at 100 KHz (dB) 55 Iq (typ) (mA) 0.019 Features Enable, Power good, Watchdog timer Thermal resistance θJA (°C/W) 38 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 150, 350 Operating temperature range (°C) -40 to 125
HTSSOP (PWP) 28 62.08 mm² (9.7 mm × 6.4 mm)
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Maximum output current: 500 mA
  • 4-V to 40-V wide VIN input-voltage range with up to 45-V transients
  • Fixed 3.3-V and 5-V outputs
  • Maximum dropout voltage: 600 mV at 500 mA
  • Stable with output capacitor in wide-range of capacitance (4.7 µF to 500 µF) and ESR (0.001 Ω to 20 Ω)
  • Low quiescent current (I(Q)):
    • < 4 µA when EN is low (shutdown mode)
    • 19 µA typical at light loads with WD_EN high (watchdog disabled)
  • Configurable for window watchdog or standard watchdog
  • Open-to-closed window ratio configurable as 1:1 or 8:1
  • Fully adjustable watchdog period (from 10 ms to 500 ms)
  • 10% accurate watchdog period
  • Dedicated WD_EN pin to control watchdog ON-OFF
  • Fully adjustable power-good threshold and power-good delay period
  • Low Input-voltage tracking to UVLO
  • Integrated fault protection:
    • Overload current-limit protection
    • Thermal shutdown
  • 28-Pin HTSSOP package
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Maximum output current: 500 mA
  • 4-V to 40-V wide VIN input-voltage range with up to 45-V transients
  • Fixed 3.3-V and 5-V outputs
  • Maximum dropout voltage: 600 mV at 500 mA
  • Stable with output capacitor in wide-range of capacitance (4.7 µF to 500 µF) and ESR (0.001 Ω to 20 Ω)
  • Low quiescent current (I(Q)):
    • < 4 µA when EN is low (shutdown mode)
    • 19 µA typical at light loads with WD_EN high (watchdog disabled)
  • Configurable for window watchdog or standard watchdog
  • Open-to-closed window ratio configurable as 1:1 or 8:1
  • Fully adjustable watchdog period (from 10 ms to 500 ms)
  • 10% accurate watchdog period
  • Dedicated WD_EN pin to control watchdog ON-OFF
  • Fully adjustable power-good threshold and power-good delay period
  • Low Input-voltage tracking to UVLO
  • Integrated fault protection:
    • Overload current-limit protection
    • Thermal shutdown
  • 28-Pin HTSSOP package

In automotive microcontroller or microprocessor power-supply applications, the watchdog is used to monitor the microcontroller working status to prevent software runaway. The watchdog must be independent of the microcontroller in a reliable system.

The TPS7B68-Q1 is a 500-mA watchdog LDO designed for an operating voltage up to 40 V, with typical quiescent current of only 19 µA at light load. The device integrates a programmable function for selecting a window or standard watchdog, with an external resistor to set the watchdog time within 10% accuracy.

The PG pin on the TPS7B68-Q1 indicates when the output voltage is stable and in regulation. The power-good delay period and power-good threshold can be adjusted by external components. The device also features an integrated short-circuit and overcurrent protection. The combination of such features makes this device particularly flexible and suitable to supply microcontroller systems in automotive applications.

In automotive microcontroller or microprocessor power-supply applications, the watchdog is used to monitor the microcontroller working status to prevent software runaway. The watchdog must be independent of the microcontroller in a reliable system.

The TPS7B68-Q1 is a 500-mA watchdog LDO designed for an operating voltage up to 40 V, with typical quiescent current of only 19 µA at light load. The device integrates a programmable function for selecting a window or standard watchdog, with an external resistor to set the watchdog time within 10% accuracy.

The PG pin on the TPS7B68-Q1 indicates when the output voltage is stable and in regulation. The power-good delay period and power-good threshold can be adjusted by external components. The device also features an integrated short-circuit and overcurrent protection. The combination of such features makes this device particularly flexible and suitable to supply microcontroller systems in automotive applications.
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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 TPS7B68-Q1 500-mA 40-V high-voltage ultralow quiescent-current watchdog LDO datasheet (Rev. C) PDF | HTML 2019/2/14
應用說明 An empirical analysis of the impact of board layout on LDO thermal performance (Rev. A) PDF | HTML 2025/9/23
功能安全資訊 TPS7B68-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 2022/10/24
應用說明 A Topical Index of TI LDO Application Notes (Rev. F) 2019/6/27
電子書 LDO Basics (Rev. A) 2019/4/8
技術文章 Discrete SBCs: versatile and scalable solutions for any application PDF | HTML 2017/7/27
技術文章 LDO basics: dropout PDF | HTML 2017/3/16

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開發板

TPS7B6850EVM — TPS7B6850-Q1 500mA 看門狗 LDO 穩壓器評估模組

TPS7B6850EVM 評估模組 (EVM) 可協助評估 TPS7B6850-Q1 看門狗低壓差穩壓器 (LDO) 的運作與效能。TPS7B6850-Q1 是一款採用 28 接腳 HTSSOP 封裝的單晶片整合式 40V 500mA 看門狗 LDO 穩壓器。該元件專為汽車環境中的微控制器或微處理器電源供應所設計。該元件具備過載保護、過溫保護，以及整合式可調式電源良好閾值與延遲時間功能。
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TPS7B6833-Q1 PSpice Transient Model

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TPS7B6850-Q1 PSpice Transient Model

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HTSSOP (PWP) 28 Ultra Librarian
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