TPS7B68-Q1 Series

Automotive 500-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator with WD

Catalog

Automotive 500-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator with WD

Part	Mounting Type	Voltage Dropout (Max) [Max]	Output Configuration	Supplier Device Package	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Grade	Current - Supply (Max) [Max]	Package / Case [custom]	Package / Case	Package / Case [custom]	Protection Features	Current - Output	Number of Regulators	Voltage - Output (Min/Fixed)	Control Features	PSRR [Min]	PSRR [Max]	Current - Quiescent (Iq)	Qualification
Texas Instruments TPS7B6833QPWPRQ1	Surface Mount	0.6 V	Positive	28-HTSSOP	1.81 mOhm	-40 °C	125 °C	Automotive	98 µA	4.4 mm	28-PowerTSSOP	0.173 "	Over Current Over Temperature	500 mA	1	3.3 V	Enable Power Good Watchdog	40 dB 100 Hz	60 dB 100 kHz	42 µA	AEC-Q100

Catalog

Automotive 500-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator with WD

Key Features

• Qualified for automotive applicationsAEC-Q100 qualified with the following results:Device temperature grade 1: –40°C to +125°C ambient operating temperature rangeDevice HBM ESD classification level 2Device CDM ESD classification level C4BMaximum output current: 500 mA4-V to 40-V wide VINinput-voltage range with up to 45-V transientsFixed 3.3-V and 5-V outputsMaximum dropout voltage: 600 mV at 500 mAStable 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 withWD_ENhigh (watchdog disabled)Configurable for window watchdog or standard watchdogOpen-to-closed window ratio configurable as 1:1 or 8:1Fully adjustable watchdog period (from 10 ms to 500 ms)10% accurate watchdog periodDedicatedWD_ENpin to control watchdog ON-OFFFully adjustable power-good threshold and power-good delay periodLow Input-voltage tracking to UVLOIntegrated fault protection:Overload current-limit protectionThermal shutdown28-Pin HTSSOP packageQualified for automotive applicationsAEC-Q100 qualified with the following results:Device temperature grade 1: –40°C to +125°C ambient operating temperature rangeDevice HBM ESD classification level 2Device CDM ESD classification level C4BMaximum output current: 500 mA4-V to 40-V wide VINinput-voltage range with up to 45-V transientsFixed 3.3-V and 5-V outputsMaximum dropout voltage: 600 mV at 500 mAStable 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 withWD_ENhigh (watchdog disabled)Configurable for window watchdog or standard watchdogOpen-to-closed window ratio configurable as 1:1 or 8:1Fully adjustable watchdog period (from 10 ms to 500 ms)10% accurate watchdog periodDedicatedWD_ENpin to control watchdog ON-OFFFully adjustable power-good threshold and power-good delay periodLow Input-voltage tracking to UVLOIntegrated fault protection:Overload current-limit protectionThermal shutdown28-Pin HTSSOP package

Description

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.