PTL431LIBQDBZRQ1 Texas Instruments Integrated Circuit (SOT23 (3-Pin)) In Stock
The PTL431LIBQDBZRQ1 is an automotive-grade adjustable precision shunt regulator by Texas Instruments with a 2.495 V nominal reference and optimized reference current in a 3-pin SOT-23 package. It meets AEC-Q100 requirements for harsh automotive environments. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- PTL431LIBQDBZRQ1 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of PTL431LIBQDBZRQ1?
- AEC-Q100 qualified for automotive-grade harsh environment reliability
- Precision 2.495 V nominal output voltage with tight 2.483 V to 2.507 V tolerance band
- Optimized reference current enabling lower power consumption versus standard TL431
- Adjustable shunt regulator topology supporting a wide output voltage programming range
- Compact 3-pin SOT-23 package minimizing PCB area in automotive power management circuits
What is PTL431LIBQDBZRQ1 used for?
The PTL431LIBQDBZRQ1 is used in automotive power supply feedback networks, voltage supervisors, and precision reference circuits within ECUs, body control modules, and ADAS sensors that must comply with AEC-Q100 reliability standards. Its optimized reference current reduces the minimum cathode current requirement, improving efficiency in low-power automotive standby circuits. Battery management systems and LED driver modules in automotive lighting also use it as a precision voltage reference with a tight 2.483 V to 2.507 V output range.
What are the specifications of PTL431LIBQDBZRQ1?
| Date Of Intro | 2019-05-10 |
| YTEOL | 0 |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDSO-G3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 2.507V |
| Output Voltage-Min | 2.483V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Screening Level | AEC-Q100 |
| Supply Voltage-Max (Vsup) | 36V |
| Supply Voltage-Min (Vsup) | 2.483V |
| Surface Mount | YES |
| Temp Coef of Voltage-Max | 63.657ppm/°C |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Trim/Adjustable Output | YES |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the PTL431LIBQDBZRQ1 datasheet?
PTL431LIBQDBZRQ1 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for PTL431LIBQDBZRQ1?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage accuracy does PTL431LIBQDBZRQ1 guarantee over automotive temperature ranges?
The PTL431LIBQDBZRQ1 maintains its output between 2.483 V and 2.507 V, a tolerance of approximately plus or minus 12 mV around the 2.495 V nominal reference. This tight band is maintained across the full AEC-Q100 automotive temperature range, typically minus 40 degrees C to 125 degrees C, ensuring stable feedback regulation in ECU power supplies and precision automotive sensor circuits.
How does the optimized reference current of PTL431LIBQDBZRQ1 benefit automotive standby power designs compared to standard TL431?
Standard TL431 requires a minimum cathode current of approximately 1 mA to regulate properly, while the PTL431LIBQDBZRQ1 features an optimized reference current that allows operation at lower cathode currents. This reduction can cut standby power losses by 30% to 50% in always-on automotive circuits such as key-off ECU keep-alive rails operating at 12 V to 14 V battery voltage, directly extending vehicle battery standby time.
In a buck converter feedback divider, what resistor ratio sets a 5 V output using the PTL431LIBQDBZRQ1 reference?
To set 5 V output using the PTL431LIBQDBZRQ1's 2.495 V reference, the upper and lower feedback resistors must satisfy the ratio R1/R2 = (Vout/Vref) - 1 = (5/2.495) - 1, approximately 1.004. A practical implementation uses R2 = 10 kOhm and R1 = 10 kOhm (ratio 1:1 sets approximately 4.99 V), enabling precise closed-loop regulation in automotive DC-DC converters meeting AEC-Q100 requirements.
Related Guides
TPSM5601R5SRDAR Design Guide: Power Module Validation
Validate a TPSM5601R5SRDAR supply with a practical plan for input limits, output networks, layout, thermal testing, and sourcing.
Oct 29, 2026
XAL6060-103MEB Design Guide for PCB Validation
Validate XAL6060-103MEB converter designs with a current-envelope worksheet, repeatable thermal tests, controlled probing, and exact-part documentation.
Oct 29, 2026
How to Choose ERJ-2RKF49R9X and Related Chip Resistors: Selection Guide
Choose ERJ-2RKF49R9X with checks for resistance, power, drift, package fit, traceability, and procurement requirements.
Oct 28, 2026
How to Choose a Power Inductor Around XAL6060-103MEB
Select a power inductor around XAL6060-103MEB by checking DC bias, peak current, heat, footprint, and traceable sourcing evidence.
Oct 28, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit