TPS7B8480QWDRBRQ1集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS7B8480QWDRBRQ1属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的TPS7B8480QWDRBRQ1稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

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.