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Texas Instruments TPS7B84-Q1 Low-Dropout Regulators

Texas Instruments TPS7B84-Q1 Low-Dropout Regulators are designed to connect to the battery in automotive applications. The TPS7B84-Q1 LDO Regulators have an input voltage range extending to 40V, which allows the device to withstand transients (such as load dump) that are anticipated in automotive systems. The TPS7B84-Q1 device is an optimal solution for powering always-on components such as microcontrollers (MCUs) and controller area network (CAN) transceivers in standby systems, using only a 18µA quiescent current.

The TI TPS7B84-Q1 Low-Dropout Regulators supports both fixed and adjustable output types. The wide output voltage range allows the device to generate the bias voltage for silicon carbide (SiC) gate drivers and microphones and power MCUs and processors.

The LDO Regulators have a state-of-the-art transient response that allows the output to quickly react to changes in load or line (for example, during cold-crank conditions). Additionally, the TPS7B84-Q1 has a novel architecture that minimizes output overshoot when recovering from the dropout. During normal operation, the device has a tight DC accuracy of ±0.75% over line, load, and temperature.

The TPS7B84-Q1 LDO Regulators are available in both a SOT223 package and a small VSON package with wettable flanks that facilitates a compact printed circuit board (PCB) design. The low thermal resistance permits sustained operation despite significant dissipation across the device.

Features

AEC-Q100 qualified for automotive applications:
- Temperature grade 1 of –40°C to +125°C, T_A
- Junction temperature of –40°C to +150°C, T_J
Input voltage range of 3V to 40V (42V max)
Output voltage range:
- 1.2V to 18V adjustable output
- 3.3V and 5V fixed output
Output current up to 150mA
Output voltage accuracy of ±0.75% (max)
Low dropout voltage of 225mV (max) at 150mA (V_OUT ≥ 3.3V)
Low quiescent current:
- 18µA (typ)
- 4µA (max) when disabled

Excellent line transient response:
- ±2% V_OUT deviation during cold-crank
- ±2% V_OUT deviation (1V/µs V_IN slew rate)
Stable with a 2.2µF or larger capacitor
Functional safety-capable
- Documentation available to aid functional safety system design
Package options:
- DRB (8-pin VSON), R_θJAof 50.8°C/W
- DCY (4-pin SOT-223), R_θJAof 85.5°C/W

Applications

Always-on battery-connected applications:
- Automotive gateways
- Remote keyless entries (RKE)

Reconfigurable instrument clusters
Body control modules (BCM)

Texas Instruments TPS7B84-Q1 Low-Dropout Regulators

Features

Applications

Typical Application Schematic

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