My Inquiry
My Account
Texas Instruments TL1431MDREPG4
- Part No.:
- TL1431MDREPG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL1431MDREPG4.pdf
- Description:
- IC VREF SHUNT ADJ 0.4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,343
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL1431MDREPG4 from Texas Instruments is a precision-programmable shunt voltage reference IC with 0.4% initial voltage tolerance, 0.2 Ω typical output impedance, and adjustable output voltage from 2.5 V to 36 V using two external resistors. It operates across –55°C to 125°C and serves as a Zener diode replacement in onboard regulation and switching power supply feedback loops.
For engineers reviewing the TL1431MDREPG4 datasheet, TL1431MDREPG4 pinout, TL1431MDREPG4 application, or TL1431MDREPG4 equivalent, this device delivers military-grade thermal stability, fast 500 ns turnon, and sink current capability from 1 mA to 100 mA - critical for high-reliability aerospace, defense, and medical power systems.
Technical Context
The TL1431MDREPG4 implements an internal precision comparator with a 2.5 V reference input (VI(ref)), driving an active NPN output stage connected between cathode and anode terminals. Its output impedance remains stable at 0.2 Ω over 1–100 mA cathode current, enabling accurate voltage regulation under dynamic load conditions.
Pin configuration integrates four anode terminals (pins 2, 3, 6, 7) internally tied together, requiring external shorting for optimal precision. The REF pin draws only 1.5 µA typical current at 25°C, minimizing resistor network error in programmable voltage setups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (VI(ref)) | 2.500 V ±10 mV at 25°C; sets minimum programmable output voltage and defines feedback node accuracy |
| Initial Voltage Tolerance | ±0.4% at 25°C; enables tight-setpoint regulation without post-manufacturing trimming |
| Output Impedance (|zKA|) | 0.2 Ω typical; ensures <1 mV output shift per 1 mA cathode current change, critical for stable feedback |
| Cathode Current Range | 1 mA to 100 mA; supports wide-range sink capability for diverse regulator topologies |
| Operating Temperature | –55°C to 125°C; qualified for extended military and aerospace environments per AQEC Standard |
| Turnon Time | 500 ns; enables fast transient response in PWM converter reference paths |
| Reference Input Current | 1.5 µA typical at 25°C; reduces bias error in high-impedance resistor dividers |
Pinout & Package
TL1431MDREPG4 is housed in an SOIC-8 (D package) with nominal body size 3.91 mm × 4.90 mm and maximum height 1.75 mm. Pins 2, 3, 6, and 7 are internally connected to the anode and must be externally shorted for highest precision.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CATHODE | Active output terminal; sinks current to anode when VI(ref) is exceeded; connects to regulated rail |
| 4, 5 | NC | No internal connection; must remain unconnected on PCB |
| 8 | REF | Inverting input of internal comparator; sets regulation threshold via external resistor divider |
| 2, 3, 6, 7 | ANODE | Common return path for cathode current; externally shorted to minimize parasitic resistance |
Key Features
| Feature | Design Value |
|---|---|
| Precision programmable output | Adjustable from 2.5 V to 36 V using two external resistors; eliminates need for multiple fixed references |
| Low output impedance | 0.2 Ω typical; maintains regulation accuracy despite cathode current variation in switching supplies |
| Fast dynamic response | 500 ns turnon time; supports high-frequency feedback in >100 kHz PWM converters |
| Military temperature qualification | –55°C to 125°C operation with controlled baseline and extended product lifecycle per AQEC Standard |
| Low reference current | 1.5 µA typical at 25°C; permits use of high-value feedback resistors to reduce power loss |
Applications
| Switching Power Supply Feedback | Programmable Shunt Regulator |
|---|---|
Use Scenario: Used in isolated flyback or forward converter secondary-side feedback loop to regulate output voltage. IC Role / Device Role: Precision shunt reference providing error signal to optocoupler input. Use Value: 0.4% initial tolerance and 0.2 Ω output impedance ensure ±1% output regulation across line/load/temperature. |
Use Scenario: Replaces discrete Zener diode in low-cost linear regulator or voltage clamp circuit. IC Role / Device Role: Adjustable shunt element maintaining constant voltage across load. Use Value: Programmable 2.5–36 V range and 100 mA sink capability support wide input/output combinations without redesign. |
| Precision Current Sink | Aerospace Onboard Regulation |
Use Scenario: Configured as constant-current source for LED biasing or sensor excitation in avionics modules. IC Role / Device Role: Reference-controlled current regulator using external sense resistor. Use Value: Low 1.5 µA REF current and stable 2.5 V reference enable sub-1% current accuracy over –55°C to 125°C. |
Use Scenario: Provides stable 5 V or 12 V reference in satellite power management units requiring long-term reliability. IC Role / Device Role: Primary voltage reference for ADCs, DACs, and supervisory circuits. Use Value: AQEC-certified construction and extended lifecycle guarantee 15+ year field operation in radiation-moderated environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL1431QDREP | Rated for –40°C to 125°C; lower temperature grade than TL1431MDREPG4's –55°C to 125°C range | Suitable for automotive and industrial applications but not certified for full military-spec environments | Select TL1431QDREP only when extended low-temperature operation is not required and cost optimization is prioritized |
| TL1431M | Same –55°C to 125°C rating but offered in ceramic DIP-8 package; higher reliability, longer burn-in, and QML-385B certification | Required for space-grade or mission-critical defense systems where hermetic sealing and radiation tolerance are mandatory | Choose TL1431M when board-level hermeticity, MIL-STD-883 testing, or space qualification is specified |
Compared with TL1431QDREP and TL1431M, TL1431MDREPG4 uniquely balances military temperature range, plastic SOIC packaging, and AQEC compliance - making it optimal for cost-sensitive defense electronics where ceramic packaging is unnecessary but extended cold-start capability is essential.
Availability
TL1431MDREPG4 is available at Aetrix Electronics and suitable for switching power supplies, programmable shunt regulators, precision current sinks, and aerospace onboard regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL1431MDREPG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of experience delivering high-reliability components for aerospace, defense, and industrial markets.
TL1431MDREPG4 belongs to TI's Enhanced Plastic (EP) product line, engineered specifically for ruggedized commercial-off-the-shelf applications demanding military-grade thermal stability, extended life cycle, and AQEC certification without ceramic packaging costs.
FAQ
What is the operating temperature range of TL1431MDREPG4?
The TL1431MDREPG4 is rated for continuous operation from –55°C to 125°C. This extended military temperature range is validated per ANSI/GEIA STD-0002-1 (AQEC Standard) and supports deployment in defense electronics, satellite subsystems, and downhole oilfield equipment where ambient extremes are routine. The device maintains 0.4% initial voltage tolerance across this full span.
Can TL1431MDREPG4 replace a Zener diode in existing designs?
Yes, TL1431MDREPG4 can directly replace Zener diodes in shunt regulator configurations. Its 2.5 V reference and programmable output up to 36 V - combined with 0.2 Ω output impedance and 500 ns turnon - provide superior regulation accuracy, thermal stability, and dynamic response versus discrete Zeners. External resistor values must be recalculated to match the desired setpoint.
How many pins on TL1431MDREPG4 are connected to the anode?
Four pins - 2, 3, 6, and 7 - are internally connected to the anode in TL1431MDREPG4. The datasheet explicitly recommends shorting these pins externally on the PCB to minimize parasitic resistance and maximize precision. Pin 1 is cathode, pin 8 is REF, and pins 4 and 5 are NC (no internal connection).
What is the typical reference input current for TL1431MDREPG4?
The typical reference input current (II(ref)) for TL1431MDREPG4 is 1.5 µA at 25°C, with a maximum of 4 µA across the full –55°C to 125°C range. This low bias current enables use of high-value feedback resistors (e.g., 100 kΩ–1 MΩ), reducing power dissipation in battery-powered or energy-sensitive applications while maintaining regulation accuracy.
Is TL1431MDREPG4 RoHS compliant and lead-free?
Yes, TL1431MDREPG4 is RoHS compliant and features NiPdAu (NIPDAU) lead finish. It meets JEDEC Level-1 moisture sensitivity requirements with unlimited peak reflow exposure at 260°C, supporting standard Pb-free soldering processes. Full compliance documentation, including material declarations and test reports, is available through Texas Instruments' official product page.
TL1431MDREPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 36 V
- Current - Output:
- 100 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 1 mA
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL1431MDREPG4 FAQ
1.How can I place an order for TL1431MDREPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL1431MDREPG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TL1431MDREPG4 reliable?
The price and inventory of TL1431MDREPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL1431MDREPG4 is usually 5 days.
3.What payment methods are accepted for TL1431MDREPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL1431MDREPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL1431MDREPG4?
TL1431MDREPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL1431MDREPG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TL1431MDREPG4?
For technical support, including TL1431MDREPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL1431MDREPG4 requirements.
6.How does Aetrix verify that TL1431MDREPG4 is sourced from the original manufacturer or authorized distributors?
All TL1431MDREPG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TL1431MDREPG4 meets industry standards.
7.What is the process for return or replacement of TL1431MDREPG4?
All TL1431MDREPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL1431MDREPG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TL1431MDREPG4 part is unused and in its original packaging.
Return procedure for TL1431MDREPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL1431MDREPG4 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
