Inicio Gestión de la energía Reguladores lineales y de baja salida (LDO)
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Gestión de la energía
Reguladores lineales y de baja salida (LDO)

TPS7B68-Q1

ACTIVO

Regulador de tensión de caída baja de 500 mA, sin batería (40 V), PSRR alto e IQ baja, con vigilanci

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TPS7B68-Q1

ACTIVO
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Detalles del producto

Output options Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 4 Vout (max) (V) 5 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5 Iq (typ) (mA) 0.019 Thermal resistance θJA (°C/W) 38 TI functional safety category Functional Safety-Capable Rating Automotive Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Features Enable, Power good, Watchdog timer Accuracy (%) 2 PSRR at 100 KHz (dB) 55 Dropout voltage (Vdo) (typ) (mV) 150 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 4 Vout (max) (V) 5 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5 Iq (typ) (mA) 0.019 Thermal resistance θJA (°C/W) 38 TI functional safety category Functional Safety-Capable Rating Automotive Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Features Enable, Power good, Watchdog timer Accuracy (%) 2 PSRR at 100 KHz (dB) 55 Dropout voltage (Vdo) (typ) (mV) 150 Operating temperature range (°C) -40 to 125
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4
  • 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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Documentación técnica

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* Data sheet TPS7B68-Q1 500-mA 40-V high-voltage ultralow quiescent-current watchdog LDO datasheet (Rev. C) PDF | HTML 14 feb 2019
Functional safety information TPS7B68-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 24 oct 2022
Technical article Discrete SBCs: versatile and scalable solutions for any application PDF | HTML 27 jul 2017

Diseño y desarrollo

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Placa de evaluación

TPS7B6850EVM — Módulo de evaluación de regulador LDO con vigilancia de 500 mA TPS7B6850-Q1

The TPS7B6850EVM evaluation module (EVM) helps you evaluate the operation and performance of the TPS7B6850-Q1 watchdog low-dropout (LDO) regulator. The TPS7B6850-Q1 device is a monolithic integrated 40-V 500-mA watchdog LDO regulator in a 28-pin HTSSOP (...)
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