Home Power management Linear & low-dropout (LDO) regulators
Home
Power management
Linear & low-dropout (LDO) regulators

TPS745-Q1

ACTIVE

Automotive 500-mA, low-IQ, high-PSRR, low-dropout (LDO) voltage regulator with power good

Order now
Data sheet

TPS745-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Vin (max) (V) 6 Vin (min) (V) 1.5 Iout (max) (A) 0.5 Output options Adjustable Output, Fixed Output Vout (max) (V) 5.5 Vout (min) (V) 0.55 Fixed output options (V) 0.7, 1, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.5, 1.7, 1.8, 2.2, 2.5, 2.8, 2.9, 3, 3.3, 3.4, 5 Noise (µVrms) 53 PSRR at 100 KHz (dB) 45 Iq (typ) (mA) 0.025 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Wettable flanks package Thermal resistance θJA (°C/W) 55, 55.5 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 1.5 Dropout voltage (Vdo) (typ) (mV) 160 Operating temperature range (°C) -40 to 125
Rating Automotive Vin (max) (V) 6 Vin (min) (V) 1.5 Iout (max) (A) 0.5 Output options Adjustable Output, Fixed Output Vout (max) (V) 5.5 Vout (min) (V) 0.55 Fixed output options (V) 0.7, 1, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.5, 1.7, 1.8, 2.2, 2.5, 2.8, 2.9, 3, 3.3, 3.4, 5 Noise (µVrms) 53 PSRR at 100 KHz (dB) 45 Iq (typ) (mA) 0.025 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Wettable flanks package Thermal resistance θJA (°C/W) 55, 55.5 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 1.5 Dropout voltage (Vdo) (typ) (mV) 160 Operating temperature range (°C) -40 to 125
VSON (DRB) 8 9 mm² 3 x 3 WSON (DRV) 6 4 mm² 2 x 2
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Device junction temperature: –40°C to 150°C
  • Package:
    • 2-mm × 2-mm wettable flank WSON
    • 3-mm × 3-mm wettable flank VSON
  • Input voltage range: 1.5 V to 6.0 V
  • Output voltage range:
    • Fixed option: 0.65 V to 5.0 V
    • Adjustable option: 0.55 V to 5.5 V
  • High PSRR: 45 dB at 100 kHz
  • Output accuracy: ±0.85% (25°C), ±1.5% maximum
  • Power-good output options:
    • Open-drain and push-pull
  • Ultra-low dropout:
    • 160 mV (max) at 500 mA (3.3 VOUT)
  • Stable with a 1-µF or larger capacitor
  • Low IQ: 25 µA (typical), 1.5 µA (shutdown)
  • Active output discharge
  • Functional Safety-Capable
  • Low thermal resistance:
    • DRV (6-pin WSON), RθJA = 80.3°C/W
    • DRB (8-pin VSON), RθJA = 55.5°C/W
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Device junction temperature: –40°C to 150°C
  • Package:
    • 2-mm × 2-mm wettable flank WSON
    • 3-mm × 3-mm wettable flank VSON
  • Input voltage range: 1.5 V to 6.0 V
  • Output voltage range:
    • Fixed option: 0.65 V to 5.0 V
    • Adjustable option: 0.55 V to 5.5 V
  • High PSRR: 45 dB at 100 kHz
  • Output accuracy: ±0.85% (25°C), ±1.5% maximum
  • Power-good output options:
    • Open-drain and push-pull
  • Ultra-low dropout:
    • 160 mV (max) at 500 mA (3.3 VOUT)
  • Stable with a 1-µF or larger capacitor
  • Low IQ: 25 µA (typical), 1.5 µA (shutdown)
  • Active output discharge
  • Functional Safety-Capable
  • Low thermal resistance:
    • DRV (6-pin WSON), RθJA = 80.3°C/W
    • DRB (8-pin VSON), RθJA = 55.5°C/W

The TPS745-Q1 is a 500-mA ultra-low-dropout regulator (LDO) with power-good functionality. This device is available in a small 6-pin, 2-mm × 2-mm WSON package and a small 8-pin, 3-mm × 3-mm VSON package with wettable flanks to facilitate optical inspection. The TPS745-Q1 consumes low quiescent current and provides fast line and load transient performance.

The TPS745-Q1 is a flexible device for post-regulation by supporting an input voltage range from 1.5 V to 6.0 V and an externally adjustable output range of 0.55 V to 5.5 V. The device also features fixed output voltages for powering common voltage rails.

The TPS745-Q1 has a power-good (PG) output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The EN input and PG output can be used for sequencing multiple power supplies in the system.

The TPS745-Q1 is stable with small ceramic output capacitors, allowing for a small overall solution size. A precision band-gap and error amplifier provides high accuracy of ±0.85% (max) at 25°C and ±1.5% (max) over temperature. This device includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features. The TPS745-Q1 has an internal foldback current limit that helps reduce the thermal dissipation during short-circuit events.

The TPS745-Q1 is a 500-mA ultra-low-dropout regulator (LDO) with power-good functionality. This device is available in a small 6-pin, 2-mm × 2-mm WSON package and a small 8-pin, 3-mm × 3-mm VSON package with wettable flanks to facilitate optical inspection. The TPS745-Q1 consumes low quiescent current and provides fast line and load transient performance.

The TPS745-Q1 is a flexible device for post-regulation by supporting an input voltage range from 1.5 V to 6.0 V and an externally adjustable output range of 0.55 V to 5.5 V. The device also features fixed output voltages for powering common voltage rails.

The TPS745-Q1 has a power-good (PG) output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The EN input and PG output can be used for sequencing multiple power supplies in the system.

The TPS745-Q1 is stable with small ceramic output capacitors, allowing for a small overall solution size. A precision band-gap and error amplifier provides high accuracy of ±0.85% (max) at 25°C and ±1.5% (max) over temperature. This device includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features. The TPS745-Q1 has an internal foldback current limit that helps reduce the thermal dissipation during short-circuit events.
filter Find other Linear & low-dropout (LDO) regulators
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 5
Top documentation Type Title Format options Date
* Data sheet TPS745-Q1 Automotive, 500-mA LDO With Power-Good in Small Wettable Flank WSON Packages datasheet (Rev. C) PDF | HTML 19 May 2022
Design guide Power Supply Design for Semidrive X9SP (X9HP Compatible) Using LP8752-Q1 and LP8756-Q1 (Rev. A) PDF | HTML 02 Jan 2025
Application brief Discrete Power Design for C2000™ PDF | HTML 15 Aug 2024
Functional safety information TPS745-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 20 Oct 2023
Product overview Mobileye EyeQ6L – Semi Discrete Power Tree PDF | HTML 05 Aug 2022

Design & development

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

Evaluation board

TPS746EVM-009 — TPS746 adjustable 1-A LDO linear regulator with power good evaluation module

The TPS746EVM-009 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS746, which is a 1-A, low-Vin, low-dropout (LDO) voltage regulator with power good.

The EVM circuit board is configured to be a reference design for engineering (...)

User guide: PDF
Not available on TI.com
Reference designs

PMP23547 — GaN-based 8kW three-phase totem-pole power factor correction and three-phase LLC reference design

This reference design is a high-density and high-efficiency 8kW power supply. The first stage is a triangular conduction mode (TCM) power factor correction (PFC) converter followed by a delta-delta connected three-phase inductor-inductor-capacitor (LLC) converter. Both power stages are implemented (...)
Test report: PDF
Reference designs

TIPA-020002 — Power supply design for Semidrive X9SP (X9HP compatible) using LP8752-Q1 and LP8756-Q1

This power design is for the Semidrive X9SP automotive system-on-chip (SoC) power rails using the LP87521-Q1, LP87562-Q1, and LP87563-Q1 power management ICs (PMICs). Additional bucks TPS62811-Q1 and TPS628501-Q1 as well as LDOs TPS74501-Q1 and TLV76733-Q1 are used to power other discrete rails (...)
Design guide: PDF
Reference designs

PMP22650 — GaN-based, 6.6-kW, bidirectional, onboard charger reference design

The PMP22650 reference design is a 6.6-kW, bidirectional, onboard charger. The design employs a two-phase totem pole PFC and a full-bridge CLLLC converter with synchronous rectification. The CLLLC utilizes both frequency and phase modulation to regulate the output across the required regulation (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-020061 — Automotive power over data lines PD reference design for 100/1000Base-T1 Ethernet applications

This reference design implements a powered device (PD) to demonstrate Power over Data Lines (PoDL) in automotive applications. The design uses a DP83TG720S-Q1 1000MBit/s single-pair Ethernet (SPE) PHY with the option to switch to the DP83TC812S-Q1 SPE PHY for 100MBit/s operation. A coupling and (...)
Design guide: PDF
Reference designs

TIDA-020060 — Automotive power over data lines reference design for 100/1000Base-T1 Ethernet applications

This reference design demonstrates an implementation of Power over Data Lines (PoDL) for automotive use cases. The design uses a DP83TG720S-Q1 1000MBit/s single-pair Ethernet (SPE) PHY with the option to switch to the DP83TC812S-Q1 SPE PHY for 100MBit/s operation. A coupling and decoupling network (...)
Design guide: PDF
Reference designs

PMP41085 — 100W Automotive Infotainment Display Module Reference Design With Functional Safety Capabilities

This reference design showcases the 100W automotive infotainment display module power reference design with cold crank, load dump and FuSa Capabilities.

The LM74900-Q1 is the first stage of the design playing a role of protection for negative input voltage, undervoltage, locked output, and (...)

Test report: PDF
Reference designs

PMP23242 — Microprocessor unit (MPU) discrete automotive power reference design

This design demonstrates a power tree using low-cost discrete voltage regulators and details the specific power up and down sequencing requirements of the different voltage rails of the AM62x-Q1 processor family.
Test report: PDF
Reference designs

PMP30819 — Automotive power supply reference design with three outputs using PMIC and LDOs

This multioutput supply powers a custom ASIC out of 5-V input voltage via multichannel IC (PMIC) LP87653-Q1. Despite this PMIC having four rails, phase three is unused and 1.1 VA (where A equals analog for sensitive loads) is generated via low-dropout regulator (LDO) on customer demand. The LDO (...)
Test report: PDF
Reference designs

PMP30921 — 4-W discontinuous conduction mode primary-side regulated flyback reference design

This tiny 4-W flyback converter with additional three isolated-output windings generates four total outputs. By windings ratio 1:1 in between primary and auxiliary winding, the conventional RCD snubber can be replaced by an AC flying capacitor providing better efficiency and lower EMI This requires (...)
Test report: PDF
Reference designs

PMP22334 — High efficiency, low-noise 5-V/3.3-V/1.8-V/1.1-V automotive display reference design

This reference design is for an automotive display application with a customized form factor. The design demonstrates the excellent thermal performance of LM61460-Q1 with its HotRod™ QFN package as well as the low EMI aided by its spread spectrum feature. It generates four (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
VSON (DRB) 8 Ultra Librarian
WSON (DRV) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos