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Product details

Parameters

Output options Fixed Output Iout (Max) (A) 0.5 Vin (Max) (V) 40 Vin (Min) (V) 3 Vout (Max) (V) 5 Vout (Min) (V) 3.3 Fixed output options (V) 3.3, 5 Noise (uVrms) 252 Iq (Typ) (mA) 0.017 Thermal resistance θJA (°C/W) 29.7 Load capacitance (Min) (µF) 2.2 Rating Automotive Regulated outputs (#) 1 Features Power Good Accuracy (%) 0.85 PSRR @ 100 KHz (dB) 70 Dropout voltage (Vdo) (Typ) (mV) 360 Operating temperature range (C) -40 to 150 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 TO-252 (KVU) 5 67 mm² 6.6 x 10.11 open-in-new Find other Linear regulators (LDO)

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: 3.3 V and 5 V (fixed)
  • Maximum output current: 500 mA
  • Output voltage accuracy: ±0.85% (max)
  • Low dropout voltage:
    • 475 mV (max) at 450 mA
  • Low quiescent current:
    • 17 µA (typ) at light loads
  • Excellent line transient response:
    • ±2% VOUT deviation during cold-crank
    • ±2% VOUT deviation (1-V/µs VIN slew rate)
  • Power-good with programmable delay period
  • Stable with a 2.2-µF or larger capacitor
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Package options:
    • 5-pin TO-252 package: 29.7°C/W RθJA
    • 8-pin HSOIC-8 package with thermal pad: 41.8°C/W RθJA
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Description

The TPS7B87-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 dumps) that are anticipated in automotive systems. With only a 17-µA quiescent current at light loads, 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 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 ±0.85% over line, load, and temperature.

The power-good delay can be adjusted by external components, allowing the delay time to be configured to fit application-specific systems.

The device is available in thermally conductive packaging to allow the device to efficiently transfer heat to the circuit board.

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Technical documentation

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Type Title Date
* Data sheet TPS7B87-Q1 500-mA, 40-V, Low-Dropout Regulator With Power-Good datasheet (Rev. A) Apr. 30, 2021
Technical article What’s not in the power MOSFET data sheet part 2: voltage-dependent leakage currents Jul. 23, 2021
User guide MLTLDO2EVM-037 Evaluation Module User's Guide May 22, 2020
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical article LDO Basics: Preventing reverse current Jul. 25, 2018
Technical article LDO basics: introduction to quiescent current Jun. 20, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
29
Description

The MLTLDO2EVM-037 multipackage low-dropout (LDO) evaluation module (EVM) allows design engineers to evaluate the operation and performance of several common packages of linear regulators for possible use in their own circuit application. This EVM configuration contains a DDA, 3-pin and 5-pin KVU (...)

Features
  • Supports most LDO linear regulators in
    • DDA package
    • 3-pin and 5-pin KVU package
    • DCY package

Design tools & simulation

SIMULATION MODEL Download
SBVM971.ZIP (12 KB) - PSpice Model
SIMULATION MODEL Download
SBVM972.ZIP (12 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
TO-252 (KVU) 5 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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