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NXP Semiconductors TLVH431DQDBVR,115
- Part No.:
- TLVH431DQDBVR,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLVH431DQDBVR,115.pdf
- Description:
- IC VREF SHUNT ADJ 0.75% 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,308
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Product details
Overview
TLVH431DQDBVR,115 from NXP Semiconductors is a D-grade (0.75 % reference voltage tolerance), low-voltage, three-terminal adjustable shunt regulator in SOT753 package, with 1.24 V nominal reference voltage, 18 V max cathode-anode voltage, and −40 °C to +125 °C operating range-used for precision feedback in automotive-grade isolated SMPS.
For engineers reviewing the TLVH431DQDBVR,115 datasheet, TLVH431DQDBVR,115 pinout, TLVH431DQDBVR,115 application, or TLVH431DQDBVR,115 equivalent, key selection criteria include reference voltage accuracy (1231–1249 mV at 25 °C), dynamic impedance (0.15 Ω typical), sink current capability (0.08–70 mA), AEC-Q100 Grade 1 qualification, and thermal stability over extended temperature range.
Technical Context
The TLVH431DQDBVR,115 implements a precision bandgap-based reference amplifier driving an NPN output stage, enabling sharp turn-on and stable regulation across its 1.24 V to 18 V programmable output range via two external resistors. Its mirrored pinning (REF on pin 4, anode on pin 5, cathode on pin 3) supports compact layout in space-constrained feedback paths.
Designed for automotive isolation applications, it delivers 4 mV typical reference drift over −40 °C to +125 °C and maintains <0.20 Ω dynamic cathode-anode impedance up to 70 mA, ensuring minimal load-induced error in high-accuracy current-sink and voltage-regulation topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1231–1249 mV at 25 °C (D-grade 0.75 % tolerance); enables ±0.94 mV absolute error in 12 V output setpoint using standard 1% resistors. |
| Cathode-Anode Voltage Range | 1.24 V to 18 V (max 20 V absolute rating); supports direct regulation of 3.3 V, 5 V, 12 V, and 15 V rails without external series pass devices. |
| Sink Current Range | 0.08 mA to 70 mA; sufficient for optocoupler LED drive in isolated flyback controllers and precision current limiting down to microamp-level thresholds. |
| Dynamic Impedance | 0.15 Ω typical (SOT753); ensures <1.05 mV output variation under 7 mA load transients-critical for stable closed-loop feedback in SMPS. |
| Temperature Range | −40 °C to +125 °C ambient; validated per AEC-Q100 Grade 1, suitable for under-hood automotive power supplies and industrial control modules. |
| Reference Drift | 4 mV typical over full temperature range; guarantees ≤0.33 % reference deviation across operating envelope-enabling tight output voltage regulation without trimming. |
| ESD Rating | 4 kV HBM; provides robust handling during PCB assembly and system integration without additional protection circuitry. |
Pinout & Package
SOT753 (SC-74A) plastic surface-mounted package, 5-lead, with exposed pad not electrically connected; dimensions 3.0 × 1.7 × 1.1 mm; thermal resistance Rth(j-a) = 400 K/W (standard FR4 PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | n.c. | No internal connection; must be left floating or tied to ground only if required for mechanical stability-no electrical function. |
| 2 | n.c. | No internal connection; identical to pin 1-no routing or soldering required for signal integrity. |
| 3 | CATHODE (k) | Main current sink path; connects to optocoupler anode or series resistor in shunt regulator configuration; handles full regulated load current. |
| 4 | REF | High-impedance reference input (0.19–0.30 µA typical Iref); sets output voltage via resistor divider to cathode and anode; sensitive to noise-requires local bypassing. |
| 5 | ANODE (a) | Return path for reference current and cathode current; connects to system ground or low-side return; pin 1/2 anode tie recommended for improved thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| D-grade 0.75 % reference tolerance | Reduces initial output voltage error by 50 % vs. standard-grade parts-minimizes need for post-production calibration in safety-critical automotive systems. |
| AEC-Q100 Grade 1 qualification | Validated for operation from −40 °C to +125 °C with lifetime reliability testing-meets functional safety requirements for ASIL-B power supply monitoring. |
| 0.15 Ω typical dynamic impedance | Enables <10 mV load regulation error at 15 mA sink current-supports stable feedback in wide-input-range DC-DC converters with variable output loading. |
| Low 0.19–0.30 µA reference current | Permits use of high-value resistor dividers (e.g., 1 MΩ/100 kΩ), reducing quiescent current and improving efficiency in battery-backed or ultra-low-power applications. |
| Mirrored pinning (REF on pin 4) | Optimizes PCB layout for isolated feedback loops by aligning REF with adjacent ground plane and minimizing trace length to optocoupler cathode. |
Applications
| Automotive Isolated SMPS Feedback | Precision Current Sink |
|---|---|
Use Scenario: Primary-side feedback in 12 V automotive flyback converter powering infotainment head unit. IC Role / Device Role / Timing Role: Shunt regulator providing precise 2.5 V reference to optocoupler LED, closing secondary-side voltage regulation loop across transformer barrier. Use Value: D-grade tolerance and −40 °C to +125 °C stability ensure ±1.5 % output voltage accuracy across engine bay temperature extremes without trim resistors. |
Use Scenario: Constant-current source for LED backlighting in instrument cluster display. IC Role / Device Role / Timing Role: Adjustable shunt regulator sinking fixed current through LED string via single sense resistor between REF and cathode. Use Value: 0.15 Ω dynamic impedance and 4 mV tempco maintain ±2 % current accuracy over full temperature range-eliminating brightness drift. |
| Programmable Overvoltage Protection | Low-Power Precision Reference |
Use Scenario: OVP threshold detector in 5 V USB-C power delivery interface. IC Role / Device Role / Timing Role: Configured as comparator with REF biased to 5.15 V; triggers shutdown when input exceeds safe limit. Use Value: 0.75 % reference tolerance ensures trip point remains within ±38 mV of target-meeting USB PD 3.0 ±5 % specification without calibration. |
Use Scenario: Reference for 12-bit ADC in battery management system monitoring cell voltages. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt reference supplying stable 1.24 V to ADC reference input via RC filter. Use Value: 0.19 µA reference current and 4 mV tempco enable <0.01 % reference error contribution-preserving effective resolution of 11.5+ bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AQDBVR | A-grade (1 % tolerance), same SOT753 package and −40 °C to +125 °C range; reference voltage 1228–1252 mV at 25 °C. | Lower accuracy requirement; acceptable where ±12 mV reference error is tolerable in 12 V output design. | Select when cost sensitivity outweighs need for D-grade precision; identical footprint and biasing. |
| TL431BIDR | TI part, 0.5 % initial tolerance, SO-8 package, −40 °C to +105 °C; higher 2.495 V reference, requires different resistor scaling. | Non-automotive industrial applications with less stringent temp range; incompatible pinout and reference voltage scaling. | Choose only if redesigning PCB layout and recalculating feedback resistors is feasible; no drop-in replacement. |
Compared with TLVH431AQDBVR, TLVH431DQDBVR,115 offers tighter reference accuracy critical for ASIL-B compliance, while TL431BIDR trades automotive qualification for higher base reference voltage and wider availability-but demands layout and schematic revision.
Availability
TLVH431DQDBVR,115 is available at Aetrix Electronics and suitable for automotive power supplies, isolated DC-DC converters, and precision current-limiting circuits requiring stable component supply with AEC-Q100 validation and extended temperature support.
Supply support for TLVH431DQDBVR,115 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The TLVH431 family was designed specifically for high-accuracy, temperature-stable shunt regulation in automotive power systems-emphasizing AEC-Q100 qualification, low drift, and robustness in noisy, thermally demanding environments.
FAQ
What is the reference voltage tolerance of TLVH431DQDBVR,115?
The TLVH431DQDBVR,115 features D-grade reference voltage tolerance of 0.75 %, meaning its reference voltage is guaranteed between 1231 mV and 1249 mV at 25 °C. This tight tolerance is maintained across the full −40 °C to +125 °C operating range, making TLVH431DQDBVR,115 suitable for automotive applications requiring high initial accuracy without calibration.
Which package type does TLVH431DQDBVR,115 use?
TLVH431DQDBVR,115 uses the SOT753 (SC-74A) 5-lead surface-mount package. It follows mirrored pinning: pin 1 and 2 are not connected, pin 3 is cathode, pin 4 is REF, and pin 5 is anode. This package supports thermal performance up to 125 °C ambient and is compatible with standard reflow soldering profiles.
Is TLVH431DQDBVR,115 qualified for automotive use?
Yes, TLVH431DQDBVR,115 is AEC-Q100 qualified to Grade 1 (−40 °C to +125 °C), with full stress testing including temperature cycling, HTOL, and ESD. Its qualification confirms suitability for under-hood automotive power supplies, body control modules, and ADAS subsystems where reliability and long-term stability are mandatory.
What is the maximum cathode current for TLVH431DQDBVR,115?
The TLVH431DQDBVR,115 supports a cathode current range of 0.08 mA to 70 mA under recommended operating conditions. The absolute maximum cathode current is 80 mA, but sustained operation above 70 mA requires derating based on ambient temperature and PCB copper area to avoid exceeding 150 °C junction temperature.
How does the pinout of TLVH431DQDBVR,115 differ from standard SOT23 variants?
Unlike SOT23-packaged TLVH431 variants (e.g., TLVH431DQDBZR) with normal pinning (REF-pin1, cathode-pin2, anode-pin3), TLVH431DQDBVR,115 uses SOT753 with mirrored pinning: pins 1 and 2 are n.c., cathode is on pin 3, REF on pin 4, and anode on pin 5. This layout optimizes routing for isolated feedback designs and avoids confusion during layout.
TLVH431DQDBVR,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 18 V
- Current - Output:
- 70 mA
- Tolerance:
- ±0.75%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
TLVH431DQDBVR,115 FAQ
1.How can I place an order for TLVH431DQDBVR,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431DQDBVR,115 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 TLVH431DQDBVR,115 reliable?
The price and inventory of TLVH431DQDBVR,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431DQDBVR,115 is usually 5 days.
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Once your TLVH431DQDBVR,115 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 TLVH431DQDBVR,115?
For technical support, including TLVH431DQDBVR,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431DQDBVR,115 requirements.
6.How does Aetrix verify that TLVH431DQDBVR,115 is sourced from the original manufacturer or authorized distributors?
All TLVH431DQDBVR,115 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 TLVH431DQDBVR,115 meets industry standards.
7.What is the process for return or replacement of TLVH431DQDBVR,115?
All TLVH431DQDBVR,115 units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431DQDBVR,115, 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 TLVH431DQDBVR,115 part is unused and in its original packaging.
Return procedure for TLVH431DQDBVR,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431DQDBVR,115 Tags
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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