TPS7B8533QWDRCRQ1

The TPS7B85-Q1 is a low-dropout linear regulator designed for direct battery connection in automotive applications. With an input voltage range up to 40V, the device can withstand transients that may occur in automotive systems, such as load dump. Its quiescent current of only 18μA makes it an excellent solution for powering always-on devices in standby systems, such as MCUs and CAN transceivers. The device features advanced transient response, enabling the output to react quickly to load or line changes (e.g., under cold-crank conditions). Additionally, its innovative architecture minimizes output overshoot during recovery from voltage droops. During normal operation, the device maintains ±0.75% DC accuracy across the full line, load, and temperature range. The TPS7B85-Q1 provides a power-good indication and integrated voltage monitoring. The power-good delay and voltage threshold are adjustable via external components. The integrated voltage detector can monitor the input voltage and alert downstream components (such as the MCU) when the battery voltage begins to drop. The device is available in a compact VSON package, enabling space-efficient PCB designs. Its low thermal resistance supports sustained operation even under high thermal dissipation conditions.

Applications

• Reconfigurable instrument cluster
• Body Control Module (BCM)
• Always-on battery connection applications: automotive gateway, Remote Keyless Entry (RKE)

Key features

• AEC-Q100 qualified for automotive applications
• Temperature Grade 1: -40°C to +125°C, TA
• Junction temperature: -40°C to +150°C, TJ
• Input voltage range: 3V to 40V (42V maximum)
• Output voltage range: 3.3V and 5V (fixed)
• Output current: up to 150mA
• Output voltage accuracy: ±0.75% (maximum)
• Low dropout:
• 225mV (maximum) at 150mA (VOUT≥3.3V)
• Low quiescent current:
• 18μA (typical)
• 4μA maximum when disabled
• Excellent line transient response:
• ±2% deviation during cold start
• ±2% deviation (VIN slew rate 1V/μs)
• Integrated voltage monitoring
• Power-good indicator with adjustable threshold and programmable delay period
• Stable with 2.2μF or higher capacitors
• Functional Safety documentation available to support functional safety system design
• Package: 10-pin VSON (with thermal pad)
• Low thermal resistance (RJA): 50.3°C/W