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1 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: 3 V to 40 V (42 V max)

? Output voltage range:

– Adjustable output: 1.2 V to 18 V

– Fixed output: 3.3 V and 5 V

? Output current: up to 150 mA

? Output voltage accuracy: ±0.75 (max)

? Low dropout voltage:

– 225 mV (max) at 150 mA (VOUT ≥ 3.3 V)

? Low quiescent current:

– 18 μA (typ)

– 4 μA (max) when disabled

? Excellent line transient response:

– ±2 VOUT deviation during cold-crank

– ±2 VOUT deviation (1-V/μs VIN slew rate)

? Stable with a 2.2-μF or larger capacitor

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? Package options:

– DRB (8-pin VSON), RθJA: 50.8°C/W

– DCY (4-pin SOT-223), RθJA: 85.5°C/W

2 Applications

? Reconfigurable instrument clusters

? Body control modules (BCM)

? Always-on battery-connected applications:

– Automotive gateways

– Remote keyless entries (RKE)

3 Description

The TPS7B84-Q1 is a low-dropout linear regulator

designed to connect to the battery in automotive

applications. The device has an input voltage range

extending to 40 V, which allows the device to

withstand transients (such as load dump) that are

anticipated in automotive systems. With only an

18-μA quiescent current, the device is an optimal

solution for powering always-on components such as

microcontrollers (MCUs) and controller area network

(CAN) transceivers in standby systems.

The TPS7B84-Q1 has 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 as well as

power MCUs and processors.

The device has 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 device has a novel

architecture that minimizes output overshoot when

recovering from dropout. During normal operation, the

device has a tight DC accuracy of ±0.75 over line,

load, and temperature.

The device is 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 enables sustained

operation despite significant dissipation across the

device.