TLV431CDBVT Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The TLV431CDBVT is an adjustable precision shunt voltage regulator from Texas Instruments with 1.5% initial accuracy and a reference voltage range of 1.24 V to 6 V. Housed in a 5-pin SOT-23 surface-mount package, it operates with a cathode current of 80 µA to 15 mA over a 0 °C to 70 °C temperature range. Suited for feedback control in switched-mode power supplies, voltage monitoring, and precision reference circuits.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TLV431CDBVT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3684(MOQ 10)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TLV431CDBVT?
- Adjustable output voltage range: 1.24 V to 6 V set by two external resistors
- 1.5% initial reference accuracy at 25 °C for precise regulation
- Low minimum operating cathode current of 80 µA enabling low-power designs
- Compact 5-pin SOT-23 package for space-constrained PCB layouts
- Fast turn-on response suitable for optocoupler feedback in flyback converters
- Wide cathode voltage range up to 18 V with sinking up to 15 mA
What is TLV431CDBVT used for?
The TLV431CDBVT is commonly used as the error amplifier and reference element in the feedback loop of flyback and buck switched-mode power supplies, driving an optocoupler to regulate the output voltage with 1.5% accuracy. It also serves as an under-voltage lockout reference, overvoltage protection comparator, and low-power voltage monitor in battery management and portable consumer electronics designs.
What are the specifications of TLV431CDBVT?
| Pbfree Code | Yes |
| Date Of Intro | 1996-01-01 |
| YTEOL | 15 |
| Additional Feature | IT HAS 1.24V TO 6V ADJUSTABLE OUTPUT |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 15A |
| Output Voltage-Max | 1.258V |
| Output Voltage-Min | 1.222V |
| Output Voltage-Nom | 1.24V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Temp Coef of Voltage-Max | 138ppm/°C |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | YES |
| Voltage Tolerance-Max | 1.5% |
| ## TLV431CDBVT Alternates Showing results | Image |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mainland China, Philippines, Thailand |
Where can I find the TLV431CDBVT datasheet?
TLV431CDBVT Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TLV431CDBVT?
Compatible alternatives and drop-in replacements for TLV431CDBVT:
Voltage Reference, 1 Output, 1.24V, Trim/Adjustable, PDSO5
suggested
suggested
suggested
Frequently Asked Questions
How is the output voltage of the TLV431CDBVT set, and what range is achievable?
The TLV431CDBVT output voltage is set by a resistor divider from the cathode to the reference pin, with the formula VOUT = VREF × (1 + R1/R2), where VREF is the internal 1.24 V reference. The achievable range is 1.24 V to 6 V. Using standard 1% resistors, output voltage accuracy better than 2% is achievable across the full adjustment range.
Can the TLV431CDBVT operate in a flyback converter feedback loop, and what cathode current does it require?
Yes, the TLV431CDBVT is widely used in flyback converter feedback loops where it drives an optocoupler LED in series with the cathode. It requires a minimum cathode current of 80 µA to regulate accurately, which is easily provided through the optocoupler forward current path. At nominal operating point the cathode voltage typically sits between 2 V and 5 V, sinking up to 15 mA depending on load conditions.
How does the TLV431CDBVT differ from the TL431 in terms of minimum reference voltage?
The standard TL431 has a fixed reference voltage of 2.495 V, while the TLV431CDBVT features a lower 1.24 V reference threshold. This lower reference allows output voltages down to 1.24 V, making the TLV431CDBVT suitable for 1.5 V, 1.8 V, and 2.5 V regulated rails common in modern low-voltage digital systems that the TL431 cannot directly regulate.
What package does the TLV431CDBVT use, and how does it fit on a compact PCB?
The TLV431CDBVT is supplied in a 5-pin SOT-23 package measuring approximately 2.9 mm × 1.6 mm with a pitch of 0.95 mm. This tiny footprint allows it to be placed very close to the power supply feedback network, minimizing parasitic trace inductance and resistance that could degrade regulation accuracy, and is compatible with standard 0402/0603 component placement on a high-density PCB.
Over what temperature range is the TLV431CDBVT specified, and what happens to reference accuracy at high temperature?
The TLV431CDBVT commercial grade is specified from 0 °C to 70 °C. The reference voltage temperature coefficient is typically 30 ppm/°C, meaning over the full 70 °C span the reference shifts by approximately 2.1 mV. For applications requiring better thermal stability, selecting the TLV431 with tighter initial accuracy grade or using calibration trim resistors can reduce the total output voltage drift to under 0.5% over the operating range.
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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
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $0.7700 | $7.70 |
| 25+ | $0.6948 | $17.37 |
| 100+ | $0.6126 | $61.26 |
| 1000+ | $0.4932 | $493.20 |
| 10000+ | $0.4397 | $4397.00 |
| 100000+ | $0.3684 | $36840.00 |
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