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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

STMicroelectronics TLVH431BIL5T

Name: TLVH431BIL5T
Brand: STMicroelectronics
SKU: TLVH431BIL5T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLVH431BIL5T

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: SC-74A, SOT-753

Datasheet:: TLVH431BIL5T.pdf

Description:: IC VREF SHUNT ADJ 0.25% SOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TLVH431BIL5T from STMicroelectronics is a precision adjustable shunt voltage reference with 0.25% initial accuracy, 1.24 V to 18 V programmable output, 100 µA minimum operating current, and operation across –40 °C to +125 °C. It delivers stable regulation in space-constrained power supervision circuits such as battery charger feedback loops and SMPS error amplifiers.

For engineers reviewing the TLVH431BIL5T datasheet, TLVH431BIL5T pinout, TLVH431BIL5T application, or TLVH431BIL5T equivalent, key selection criteria include temperature coefficient (±100 ppm/°C max), dynamic impedance (0.22 Ω typ), sink current capability (60 mA), and SOT23-5L package compatibility with high-density PCB layouts.

Technical Context

The TLVH431BIL5T functions as a 2-terminal adjustable shunt regulator where cathode-anode voltage is set by an external resistor divider connected to the reference input. Its internal bandgap reference and transconductance amplifier enable precise voltage sensing and fast error correction without requiring external compensation.

It operates over a wide cathode current range (100 µA–60 mA) with low dynamic impedance (≤0.85 Ω) and maintains regulation stability under varying load and temperature conditions, supported by guaranteed 100 ppm/°C max tempco and ±26.7 mV total Vref variation across –40 °C to +125 °C for the B-grade variant.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.24 V (min), 1.246 V (typ), 1.253 V (max) at 25 °C - defines absolute output setting accuracy for feedback networks
Voltage Precision	0.25% at 25 °C - enables tight output tolerance in regulated power supplies without trimming
Tempco	±100 ppm/°C max - ensures ≤±26.7 mV total Vref drift over full industrial temperature range
Sink Current Range	100 µA to 60 mA - supports low-power standby modes and high-current error-signal sinking
Dynamic Impedance	0.22 Ω typ (ΔIK = 10 mA to 60 mA, f ≤ 1 kHz) - minimizes output voltage perturbation during transient load changes
Turn-on Time	40–70 µs - enables fast response in overvoltage protection and adaptive biasing circuits
Operating Temp	–40 °C to +125 °C - qualified for automotive under-hood and industrial motor control environments

Pinout & Package

SOT23-5L surface-mount package: 2.9 mm × 1.6 mm × 1.3 mm body, 0.95 mm lead pitch, thermally enhanced layout with exposed pad not electrically connected.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (K)	Current sink output terminal	Connects to supply rail or error amplifier output; carries full load regulation current up to 60 mA
Anode (A)	Reference return path	Ground reference for internal bandgap; must be low-impedance to maintain regulation accuracy
Ref (R)	Adjustment input	High-impedance node (2.5 µA typ) that sets V_KA via external resistor divider (R1/R2)
NC1	No connect	Internally unconnected pin; left floating or tied to ground per layout best practice
NC2	No connect	Internally unconnected pin; no electrical function; avoid routing signals nearby to prevent coupling

Key Features

Feature	Design Value
Adjustable Output Range	1.24 V to 18 V - enables single-part support for 3.3 V, 5 V, 12 V, and 15 V supply monitoring without redesign
Low Operating Current	100 µA min - reduces quiescent power in battery-backed systems and energy harvesting nodes
High Sink Capability	60 mA continuous - drives optocoupler LEDs directly in isolated SMPS feedback paths
Stable Tempco	±100 ppm/°C max - eliminates need for external temperature compensation in wide-temp applications
Fast Turn-on	40–70 µs - meets timing requirements for real-time overvoltage shutdown in DC-DC converters

Applications

Battery Charger Feedback

Isolated SMPS Regulation

Use Scenario: Precision voltage sensing in Li-ion battery charging ICs to maintain ±0.5% charge termination accuracy.

IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V reference to charger IC's error amplifier input.

Use Value: 0.25% initial accuracy and ±26.7 mV total drift ensure charge voltage remains within JEITA-compliant limits across ambient temperatures.

Use Scenario: Secondary-side voltage regulation in flyback converters using optocoupler-based feedback.

IC Role / Device Role / Timing Role: Cathode-connected to optocoupler LED anode; regulates LED current proportional to output voltage deviation.

Use Value: 60 mA sink capability drives CTR-marginal optocouplers; 0.22 Ω dynamic impedance suppresses noise-induced regulation jitter.

Data Acquisition Reference

Industrial Power Monitor

Use Scenario: Stable reference for 12-bit ADCs in portable multimeters and sensor signal conditioners.

IC Role / Device Role / Timing Role: Provides excitation voltage for ratiometric bridge sensors and reference for SAR ADC conversion.

Use Value: 30 µV_RMS wideband noise and <100 ppm/°C tempco preserve ENOB >11.5 bits over full temperature range.

Use Scenario: Undervoltage/overvoltage detection in PLC I/O modules with 24 V DC field power rails.

IC Role / Device Role / Timing Role: Configured as comparator with hysteresis via external resistors to trigger fault interrupts.

Use Value: 100 µA start-up current enables direct connection to rail without pre-bias; 125 °C rating supports enclosure mounting near heat sources.

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable shunt reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIL5T	0.5% initial accuracy (vs. 0.25%), otherwise identical specs and pinout	Acceptable where ±0.5% output tolerance satisfies system-level accuracy budget	Select when cost sensitivity outweighs need for highest precision; same footprint and thermal behavior
TL431BIDBZR	2% initial accuracy, higher 0.5 mA min cathode current, 700 mW power dissipation limit	Requires larger resistor divider; unsuitable for ultra-low-power or high-temp (>85 °C) use	Choose only if legacy design reuse or TI ecosystem alignment is required; not drop-in for TLVH431BIL5T

Compared with TLVH431AIL5T and TL431BIDBZR, the TLVH431BIL5T offers superior precision and lower operating current, enabling tighter regulation in battery-powered and automotive-grade systems where thermal headroom and long-term stability are critical.

Availability

TLVH431BIL5T is available at Aetrix Electronics and suitable for battery chargers, isolated switch-mode power supplies, and industrial data acquisition systems requiring stable component supply with guaranteed long-term availability.

Supply support for TLVH431BIL5T 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TLVH431 belongs to ST's precision analog reference product line, engineered specifically for high-accuracy, low-power voltage regulation in space-constrained and thermally demanding applications.

FAQ

What is the maximum cathode-to-anode voltage for TLVH431BIL5T?

The absolute maximum cathode-to-anode voltage (V_KA) is 22 V. Operation above this risks permanent damage. For reliable regulation, V_KA must remain between V_REF (1.24 V) and 18 V per datasheet operating conditions, with derating applied above 125 °C junction temperature.

Can TLVH431BIL5T replace TL431 in existing designs?

Direct replacement is possible only if the design uses SOT23-5L packaging, requires ≤0.25% accuracy, and operates below 125 °C. TLVH431BIL5T draws less current (100 µA vs. 1 mA min), so existing resistor dividers may need recalculating to maintain regulation. Pinout differs from standard TL431 SO-8 variants.

Does TLVH431BIL5T require an output capacitor for stability?

No external capacitor is required for basic shunt regulation stability. However, a 1 nF ceramic capacitor placed directly across cathode-anode improves noise immunity and transient response in noisy environments. Larger capacitors (>10 nF) may cause oscillation due to phase shift in the internal loop.

How does the SOT23-5L package affect thermal performance compared to SOT23-3L?

The SOT23-5L package has lower thermal resistance junction-to-ambient (157 °C/W vs. 248 °C/W for SOT23-3L), enabling higher continuous power dissipation (up to 320 mW at 25 °C ambient) before reaching 150 °C junction limit. This supports sustained 60 mA sink operation in compact layouts.

TLVH431BIL5T Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: SC-74A, SOT-753

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Shunt

Output Type:: Adjustable

Voltage - Output (Min/Fixed):: 1.24V

Voltage - Output (Max):: 18 V

Current - Output:: 60 mA

Tolerance:: ±0.25%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 30mVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 200 µA

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TLVH431BIL5T FAQ

1.How can I place an order for TLVH431BIL5T through Aetrix?

Please submit a Request for Quotation (RFQ) for TLVH431BIL5T 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 TLVH431BIL5T reliable?

The price and inventory of TLVH431BIL5T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431BIL5T is usually 5 days.

3.What payment methods are accepted for TLVH431BIL5T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431BIL5T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLVH431BIL5T?

TLVH431BIL5T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLVH431BIL5T 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 TLVH431BIL5T?

For technical support, including TLVH431BIL5T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431BIL5T requirements.

6.How does Aetrix verify that TLVH431BIL5T is sourced from the original manufacturer or authorized distributors?

All TLVH431BIL5T 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 TLVH431BIL5T meets industry standards.

7.What is the process for return or replacement of TLVH431BIL5T?

All TLVH431BIL5T units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431BIL5T, 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 TLVH431BIL5T part is unused and in its original packaging.

Return procedure for TLVH431BIL5T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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