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STMicroelectronics TLVH431MIL3T
- Part No.:
- TLVH431MIL3T
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431MIL3T.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:24,785
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Product details
Overview
TLVH431MIL3T from STMicroelectronics is a 1% precision adjustable shunt voltage reference in SOT23-3L package, delivering stable 1.24–18 V output via external resistor divider, with 100 µA minimum operating current, 100 ppm/°C max tempco, and -40 to +125 °C operation-used in battery charger feedback loops and SMPS error amplifiers.
For engineers reviewing the TLVH431MIL3T datasheet, TLVH431MIL3T pinout, TLVH431MIL3T application, or TLVH431MIL3T equivalent, key selection criteria include output voltage adjustability range, cathode current capability (100 µA–60 mA), thermal stability across automotive temperature range, and SOT23-3L footprint compatibility with space-constrained power management designs.
Technical Context
The TLVH431MIL3T functions as a 2-terminal programmable shunt regulator: anode and cathode form the main current path, while the reference (REF) pin senses divided output voltage to control conduction. Its internal bandgap reference and transconductance amplifier enable precise regulation without external op-amps.
It operates over 100 µA to 60 mA cathode current, maintaining ≤0.62 Ω static impedance and 0.22 Ω typical dynamic impedance at 10–60 mA, with turn-on time under 70 µs and wideband noise of 30 mVRMS (10 Hz–100 kHz). Temperature coefficient is guaranteed ≤100 ppm/°C across -40 to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 1.24 V to 18 V - set by external resistive divider; enables flexible feedback design for diverse supply rails. |
| Voltage Precision | ±1% at 25 °C - ensures initial accuracy for closed-loop regulation without trimming. |
| Tempco (Max) | 100 ppm/°C - limits total output drift to ±32.8 mV over full -40 to +125 °C range. |
| Min Operating Current | 100 µA - supports ultra-low-power applications like coin-cell-powered sensors. |
| Sink Current Capability | 60 mA - provides sufficient headroom for driving optocoupler LEDs in isolated SMPS feedback paths. |
| Dynamic Impedance | 0.22 Ω (typ) - minimizes output perturbation during load transients in precision references. |
| Turn-on Time | 70 µs (max) - ensures fast response to output overvoltage events in protection circuits. |
Pinout & Package
TLVH431MIL3T is housed in a 3-pin SOT23-3L surface-mount package (JEDEC MO-178AB), with 1.3 mm height, 2.9 mm length, and 1.3 mm width-optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current return path | Connected to system ground or low-side reference node; must handle full sink current. |
| Cathode (K) | Main output terminal | Drives feedback network or optocoupler; voltage at this pin equals programmed Vref when regulated. |
| Reference (REF) | Feedback sense input | High-impedance (≤2.5 µA) input that compares divided output against internal 1.24 V bandgap reference. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable 1.24–18 V output | Enables single BOM item to support multiple output rails without custom references. |
| 100 µA min operating current | Permits use in energy-harvesting and battery-backed systems where quiescent power is critical. |
| 0.22 Ω dynamic impedance | Reduces output voltage ripple under varying load conditions in precision analog feedback paths. |
| -40 to +125 °C operation | Validates suitability for under-hood automotive modules and industrial power supplies. |
| SOT23-3L footprint | Matches industry-standard 3-pin shunt reference layout, easing drop-in replacement in existing designs. |
Applications
| Battery Charger Feedback | Isolated SMPS Regulation |
|---|---|
Use Scenario: Lithium-ion battery charging circuit with adaptive constant-voltage stage. IC Role / Device Role / Timing Role: Shunt reference providing precise voltage threshold to comparator controlling charge termination. Use Value: ±1% initial accuracy and 100 ppm/°C tempco ensure ±0.5% total voltage tolerance across temperature, preventing overcharge. | Use Scenario: Flyback converter with optocoupler-based secondary-side regulation. IC Role / Device Role / Timing Role: Secondary-side shunt reference biasing optocoupler LED to close feedback loop across isolation barrier. Use Value: 60 mA sink capability drives standard PC817 optocoupler LED at full load, while 100 µA start-up current enables regulation at light loads. |
| Data Acquisition Reference | Energy Management Monitor |
Use Scenario: Portable multimeter measuring DC voltages up to 20 V with auto-ranging. IC Role / Device Role / Timing Role: Programmable reference for ADC input scaling and offset calibration. Use Value: Adjustable 1.24–18 V range allows single reference to calibrate multiple input ranges; low noise (30 mVRMS) preserves measurement SNR. | Use Scenario: Smart battery pack monitoring IC detecting cell overvoltage during charging. IC Role / Device Role / Timing Role: Precision voltage threshold detector triggering shutdown logic when cell voltage exceeds safe limit. Use Value: Guaranteed -40 to +125 °C operation ensures reliable trip point across environmental extremes; 70 µs turn-on time enables fast fault response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIL3T | 0.5% initial precision (vs. 1%); same SOT23-3L package and electrical specs. | Required where tighter initial tolerance is needed for high-accuracy battery voltage monitoring. | Select when ±0.5% output accuracy at 25 °C is mandatory and cost premium is acceptable. |
| TL431BIDBZR | 0.5% precision, but higher 600 µA min operating current and 120 ppm/°C tempco. | Less suitable for ultra-low-power or extended-temperature industrial designs. | Choose only if legacy TL431 footprint compatibility is required and higher quiescent current is tolerable. |
Compared with TLVH431AIL3T, TLVH431MIL3T trades 0.5% initial accuracy for lower cost and identical thermal performance; versus TL431BIDBZR, it delivers 6× lower operating current and 20% better tempco-critical for battery-operated and automotive applications.
Availability
TLVH431MIL3T is available at Aetrix Electronics and suitable for battery chargers, switch-mode power supplies, and data acquisition systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TLVH431MIL3T 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, designing and manufacturing microcontrollers, power management ICs, analog components, and MEMS sensors.
The TLVH431 belongs to ST's precision analog reference product line, engineered specifically for high-stability, low-power shunt regulation in space-constrained power conversion and sensing applications.
FAQ
What is the minimum cathode current required for regulation at -40 °C?
At -40 °C, TLVH431MIL3T requires a minimum cathode current of 160 µA to maintain regulation, per Table 5 in the datasheet. This increases from the 25 °C value of 100 µA due to temperature-dependent transistor characteristics in the reference core.
Can TLVH431MIL3T replace TL431 in existing designs?
Yes, with circuit review: TLVH431MIL3T shares identical pinout and basic function but offers lower 100 µA min current (vs. 1 mA for TL431), improved tempco (100 vs. 120 ppm/°C), and tighter 1% tolerance. Layout is compatible, but feedback resistor values may need adjustment for optimal stability.
What is the maximum cathode-to-anode voltage rating?
The absolute maximum cathode-to-anode voltage (VKA) is 22 V, as specified in Table 2. Operation above this risks permanent damage. For reliable design, VKA should be limited to ≤18 V per Table 4's recommended operating condition.
Does TLVH431MIL3T require an output capacitor for stability?
No external capacitor is required for basic regulation stability. However, a 10 nF capacitor across cathode-anode improves transient response and reduces noise-Figure 13 shows turn-on behavior with CLOAD = 10 nF, confirming stable operation without oscillation.
TLVH431MIL3T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 200 µA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TLVH431MIL3T FAQ
1.How can I place an order for TLVH431MIL3T through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431MIL3T 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 TLVH431MIL3T reliable?
The price and inventory of TLVH431MIL3T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431MIL3T is usually 5 days.
3.What payment methods are accepted for TLVH431MIL3T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431MIL3T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431MIL3T?
TLVH431MIL3T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431MIL3T 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 TLVH431MIL3T?
For technical support, including TLVH431MIL3T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431MIL3T requirements.
6.How does Aetrix verify that TLVH431MIL3T is sourced from the original manufacturer or authorized distributors?
All TLVH431MIL3T 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 TLVH431MIL3T meets industry standards.
7.What is the process for return or replacement of TLVH431MIL3T?
All TLVH431MIL3T units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431MIL3T, 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 TLVH431MIL3T part is unused and in its original packaging.
Return procedure for TLVH431MIL3T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431MIL3T Tags
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