Overview
The TPS7B84-Q1 is a 150-mA, 40-V, adjustable and fixed output low-dropout linear regulator designed by Texas Instruments for automotive applications. This device is AEC-Q100 qualified, ensuring it meets stringent automotive standards with a temperature range of –40°C to +125°C and a junction temperature range of –40°C to +150°C. It is optimized for use in always-on battery-connected systems, offering low quiescent current and excellent line transient response, making it suitable for powering microcontrollers, CAN transceivers, and other critical components in automotive systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3 | 40 (42 V max) | V | |
| Output Voltage Range | 1.2 | 18 (Adjustable), 3.3 V, 5 V (Fixed) | V | |
| Output Current | 150 | mA | ||
| Output Voltage Accuracy | –0.75% | +0.75% | % | |
| Dropout Voltage (VOUT ≥ 3.3 V) | 225 mV (max) at 150 mA | mV | ||
| Quiescent Current | 18 µA | 4 µA (max) when disabled | µA | |
| Enable Logic Input Levels | 0.7 V | 2 V | V | |
| Thermal Resistance (RθJA) | 50.8 °C/W (DRB package) | 85.5 °C/W (DCY package) | °C/W |
Key Features
- AEC-Q100 qualified for automotive applications with temperature grade 1: –40°C to +125°C, TA and junction temperature: –40°C to +150°C, TJ.
- Wide input voltage range: 3 V to 40 V (42 V max).
- Adjustable and fixed output voltage options: 1.2 V to 18 V (adjustable), 3.3 V and 5 V (fixed).
- Low dropout voltage: up to 225 mV at 150 mA for VOUT ≥ 3.3 V.
- Low quiescent current: 18 µA (typ) and 4 µA (max) when disabled.
- Excellent line transient response: ±2% VOUT deviation during cold-crank and line transients.
- Functional Safety-Capable with documentation available to aid in functional safety system design.
- Available in DRB (8-pin VSON) and DCY (4-pin SOT-223) packages.
Applications
- Reconfigurable instrument clusters.
- Body control modules (BCM).
- Always-on battery-connected applications:
- Automotive gateways.
- Remote keyless entries (RKE).
- Powering microcontrollers (MCUs) and controller area network (CAN) transceivers in standby systems.
- Bias voltage for silicon carbide (SiC) gate drivers and microphones.
Q & A
- What is the input voltage range of the TPS7B84-Q1?
The input voltage range is from 3 V to 40 V, with a maximum of 42 V.
- What are the output voltage options for the TPS7B84-Q1?
The device offers adjustable output from 1.2 V to 18 V and fixed outputs of 3.3 V and 5 V.
- What is the maximum output current of the TPS7B84-Q1?
The maximum output current is 150 mA.
- What is the quiescent current of the TPS7B84-Q1 when enabled and disabled?
The quiescent current is typically 18 µA when enabled and a maximum of 4 µA when disabled.
- What are the thermal resistance values for the different packages of the TPS7B84-Q1?
The thermal resistance (RθJA) is 50.8 °C/W for the DRB package and 85.5 °C/W for the DCY package.
- Is the TPS7B84-Q1 suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What are some typical applications of the TPS7B84-Q1?
It is used in reconfigurable instrument clusters, body control modules (BCM), automotive gateways, and remote keyless entries (RKE), among others.
- How does the TPS7B84-Q1 handle line transients?
The device has an excellent line transient response with ±2% VOUT deviation during cold-crank and line transients.
- What is the dropout voltage of the TPS7B84-Q1?
The dropout voltage is up to 225 mV at 150 mA for VOUT ≥ 3.3 V.
- Is the TPS7B84-Q1 functional safety-capable?
Yes, it is functional safety-capable with available documentation to aid in functional safety system design.
- In what packages is the TPS7B84-Q1 available?
The device is available in DRB (8-pin VSON) and DCY (4-pin SOT-223) packages.
