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.
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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.
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