TPS7B8125QDGNRQ1

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The TPS7B8125QDGNRQ1 is an automotive-grade low-dropout linear regulator featuring a fixed 2.5V output and a maximum continuous current of 150mA. It operates within a wide input voltage range of 3V to 40V, supporting up to 45V transients. The device exhibits ultra-low quiescent current, typically 2.7µA at light loads and 1µA in shutdown mode. It provides 1.5% output voltage accuracy over line, load, and temperature variations. The component includes integrated thermal shutdown, short-circuit protection, and undervoltage lockout. It is housed in an 8-pin HVSSOP package with a PowerPAD for enhanced thermal dissipation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low quiescent current consumption designed to conserve energy in always-on automotive systems
• Integrated fault protection including thermal shutdown, short-circuit, and overcurrent limiting
• High-voltage tolerant enable pin allowing direct interface with microcontrollers or digital circuits
• Stable operation with low-ESR ceramic capacitors ranging from 1µF to 200µF

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive head units
• Headlights
• Battery management systems (BMS)
• Inverter and motor controls

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'DGNRQ1' corresponds to the 8-pin HVSSOP package with tape-and-reel packaging. Confirm AEC-Q100 Grade 1 qualification requirements match the target ambient and junction temperature ranges. Ensure the fixed 2.5V output variant aligns with system design needs, as other fixed voltages are available in the same family.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 2.5V rail is required for 150mA loads in 40V automotive environments. The DGN package offers lower thermal resistance compared to smaller footprints. Verify that the output capacitor ESR falls within the 0.001Ω to 5Ω stability range. Consider the 2.7µA typical quiescent current for standby power budgets.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the TPS7B81-Q1 family of off-battery LDO regulators. It shares core electrical characteristics with variants offering 3.3V and 5V outputs but is specifically configured for a 2.5V nominal output. The device is engineered for high reliability in harsh automotive conditions, utilizing Texas Instruments' specialized process technology for low noise and high PSRR.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct functional substitutes within the same family include TPS7B8133QDGNRQ1 (3.3V) and TPS7B8150QDGNRQ1 (5V). Cross-family replacements require matching input voltage, current capability, and package dimensions.