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NXP Semiconductors TLVH431QDBVR,115
- Part No.:
- TLVH431QDBVR,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLVH431QDBVR,115.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,875
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Product details
Overview
TLVH431QDBVR,115 from NXP Semiconductors is an AEC-Q100 Grade 1 qualified low-voltage adjustable precision shunt regulator in SOT753 (SC-74A) package, with 1 % reference voltage tolerance (1228–1252 mV at 25 °C), −40 °C to +125 °C operating range, 0.15 Ω typical dynamic cathode-anode impedance, and 0.08–70 mA sink current capability. It serves as a programmable voltage reference or precision current sink in automotive power supply feedback loops.
For engineers reviewing the TLVH431QDBVR,115 datasheet, TLVH431QDBVR,115 pinout, TLVH431QDBVR,115 application, or TLVH431QDBVR,115 equivalent, key selection criteria include its A-grade 1 % Vref tolerance, automotive temperature rating, 5-pin SOT753 package with NC pins, low output impedance, and compatibility with isolated SMPS feedback designs requiring stable 1.24–18 V programmability.
Technical Context
The TLVH431QDBVR,115 implements a bandgap-referenced error amplifier driving an NPN output stage, enabling sharp turn-on and precise regulation across its 1.24–18 V output range set by two external resistors. Its internal architecture delivers low temperature drift (±4 mV over −40 °C to +125 °C) and high immunity to cathode-anode voltage variation (−0.5 to −1.5 mV/V).
Designed for automotive-grade reliability, it features AEC-Q100 qualification (Grade 1), 4 kV HBM ESD rating, and thermal resistance of 400 K/W (junction-to-ambient, FR4 PCB). The SOT753 package includes two no-connect (NC) pins-pins 1 and 2-reducing layout sensitivity while maintaining mechanical robustness for reflow soldering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1228–1252 mV at 25 °C (A-grade 1 % tolerance; enables ±12.5 mV absolute accuracy in closed-loop systems) |
| Operating temperature | −40 °C to +125 °C (AEC-Q100 Grade 1 qualification supports under-hood automotive applications) |
| Cathode current (IK) | 0.08–70 mA (supports precision current sinking from microamps up to 70 mA without external gain stages) |
| Dynamic impedance (ZKA) | 0.15–0.20 Ω (ensures <1 mV output perturbation under 10 mA load transients; critical for stable SMPS feedback) |
| Reference current (Iref) | 0.19–0.30 µA (ultra-low bias current minimizes resistor-divider loading error in high-impedance programming networks) |
| Cathode-anode voltage (VKA) | 1.24–18 V (programmable output range allows single-part support for 3.3 V, 5 V, 12 V, and 15 V rails) |
| ESD rating (HBM) | 4 kV (meets automotive system-level ESD immunity requirements without additional protection circuitry) |
Pinout & Package
SOT753 (SC-74A) plastic surface-mounted package with 5 leads; pins 1 and 2 are no-connect (NC), pin 3 is cathode (k), pin 4 is reference (REF), and pin 5 is anode (a). Thermal pad not present; standard footprint per Figure 34 (NXP doc Rev. 1, p.21).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No-connect (NC) | Unused terminal; must remain unconnected or tied to ground only if required for mechanical stability-no electrical function |
| 2 | No-connect (NC) | Unused terminal; electrically isolated; no impact on regulation performance when left floating |
| 3 | Cathode (k) | Main current sink path; connects to regulated rail or optocoupler cathode in isolated SMPS feedback |
| 4 | Reference (REF) | High-impedance input sensing node; sets output voltage via resistor divider to anode and cathode |
| 5 | Anode (a) | Return path for reference current and cathode current; ties to system ground or low-side return in shunt configurations |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures (−40 °C to +125 °C) and lifetime reliability in engine control, body electronics, and ADAS modules |
| 1 % reference voltage tolerance | Reduces output voltage error budget by 50 % vs. standard-grade (1.5 %) variants-critical for tight-tolerance battery charging or sensor biasing |
| 0.15 Ω typical dynamic impedance | Enables <150 µV output shift under 1 mA load step-supports stable regulation in noise-sensitive analog subsystems |
| 0.19–0.30 µA reference current | Permits use of >1 MΩ resistor dividers, minimizing power loss and thermal drift in high-voltage (>12 V) programmable supplies |
| −0.5 to −1.5 mV/V VKA sensitivity | Ensures <27 mV total output variation across full 1.24–18 V cathode-anode range-essential for consistent feedback in wide-input SMPS |
Applications
| Automotive On-Board Charger Feedback | Industrial Precision Current Sink |
|---|---|
Use Scenario: Regulating 12 V output in bidirectional EV on-board charger using optocoupler-isolated feedback loop. IC Role / Device Role / Timing Role: Shunt regulator providing precise 2.5 V reference to optocoupler LED anode; sets secondary-side voltage threshold. Use Value: A-grade 1 % Vref tolerance ensures ±120 mV output accuracy at 12 V, meeting ISO 15118 compliance for grid-to-vehicle power transfer. |
Use Scenario: Generating stable 20 mA bias current for MEMS pressure sensor front-end in industrial process monitoring. IC Role / Device Role / Timing Role: Constant-current sink configured with single resistor between REF and cathode; regulates sensor excitation current independent of supply ripple. Use Value: 0.15 Ω dynamic impedance maintains current stability within ±0.3 % over 100 mV line ripple-eliminates need for post-regulation filtering. |
| Isolated DC-DC Converter Reference | Programmable Overvoltage Protection |
Use Scenario: Secondary-side voltage sensing in 48 V–12 V isolated buck converter for server power distribution. IC Role / Device Role / Timing Role: Adjustable shunt reference feeding TLPM optocoupler; enables fast transient response (<1 µs rise time) in feedback path. Use Value: Low 4 mV tempco over −40 °C to +125 °C guarantees <±150 mV reference drift across full operating range-preserves output regulation accuracy in datacenter thermal environments. |
Use Scenario: Monitoring 24 V industrial bus voltage and triggering shutdown when exceeding 25.2 V threshold. IC Role / Device Role / Timing Role: Programmable shunt regulator connected to gate of external MOSFET; clamps bus when voltage exceeds resistor-set threshold. Use Value: 70 mA sink capability drives MOSFET gate directly without buffer, enabling <100 ns overvoltage response-meets IEC 61000-4-5 surge immunity timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AQDBZR | SOT23-3 package (3-pin); same A-grade 1 % Vref, −40 °C to +125 °C, but no NC pins and higher thermal resistance (320 K/W vs. 400 K/W) | Limited to lower-power applications (<300 mW) due to smaller package; unsuitable where board space permits larger SOT753 or where NC pins aid routing | Select TLVH431AQDBZR only when footprint constraints prohibit SOT753 or when thermal dissipation remains below 250 mW. |
| TLVH431DQDBVR | D-grade 0.75 % Vref tolerance (1231–1249 mV); identical SOT753 package, temperature range, and electrical specs otherwise | Higher accuracy required for metrology-grade references or ultra-stable sensor biasing where ±9 mV total error is unacceptable | Choose TLVH431DQDBVR when system-level calibration budget demands sub-1 % absolute reference accuracy at end-of-life. |
Compared with TLVH431AQDBZR, TLVH431QDBVR,115 offers superior thermal margin in high-ambient environments and simplified routing via NC pins; compared with TLVH431DQDBVR, it trades 0.25 % Vref tolerance for broader availability and lower unit cost in AEC-Q100-compliant automotive production.
Availability
TLVH431QDBVR,115 is available at Aetrix Electronics and suitable for automotive power management, industrial current regulation, and isolated DC-DC converter feedback requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLVH431QDBVR,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 to replace Zener diodes in precision shunt regulation tasks, targeting automotive-grade reliability, low-noise operation, and programmable voltage setpoints from 1.24 V to 18 V.
FAQ
What is the reference voltage tolerance of TLVH431QDBVR,115 and how is it verified?
The TLVH431QDBVR,115 has a guaranteed 1 % reference voltage tolerance (1228–1252 mV at 25 °C), specified as A-grade per NXP's TLVH431 family datasheet Rev. 1 (April 2012). This tolerance is validated across −40 °C to +125 °C ambient temperature and confirmed through AEC-Q100 stress testing, including temperature cycling and HTOL. The TLVH431QDBVR,115 achieves this via laser-trimmed bandgap circuitry during final test.
Can TLVH431QDBVR,115 be used in isolated SMPS feedback circuits, and what design considerations apply?
Yes, TLVH431QDBVR,115 is explicitly recommended for isolated feedback loops in Switch Mode Power Supplies (SMPS), as shown in Figure 29 of its datasheet. Key design considerations include selecting an optocoupler with CTR ≥100 % to ensure sufficient drive at minimum IK (0.08 mA), placing the device close to the optocoupler LED to minimize noise pickup, and verifying stability with load capacitance ≥1 nF per Figure 21-especially at high temperatures where oscillation risk increases.
What is the function of pins 1 and 2 on TLVH431QDBVR,115, and can they be grounded?
Pins 1 and 2 of TLVH431QDBVR,115 are no-connect (NC) terminals with no internal connection. They serve only mechanical and thermal roles in the SOT753 package and must remain unconnected electrically. Grounding them is unnecessary and may compromise solder joint integrity or introduce parasitic coupling; NXP's datasheet Figure 31 and Table 5 confirm these pins are isolated and recommend leaving them floating.
How does the dynamic cathode-anode impedance of TLVH431QDBVR,115 affect its performance in precision current sink applications?
The TLVH431QDBVR,115 exhibits 0.15–0.20 Ω typical dynamic cathode-anode impedance (ZKA), measured at f < 1 kHz with IK = 0.1–70 mA. In precision current sink configurations-such as those in Figure 28-the low ZKA ensures minimal deviation (<1 mV) in sink voltage under load transients, preserving current accuracy to within ±0.01 % for 20 mA sinks. This eliminates need for external compensation in most industrial sensor biasing applications.
Is TLVH431QDBVR,115 compatible with lead-free reflow soldering processes, and what profile is recommended?
Yes, TLVH431QDBVR,115 is qualified for lead-free reflow soldering per JEDEC J-STD-020. NXP recommends a peak temperature of 260 °C (≤10 seconds), ramp-up rate ≤3 °C/s, and time above 217 °C of 60–150 seconds. The SOT753 footprint in Figure 34 (page 21) specifies 0.45 mm solder paste stencil openings and 2.825 mm × 3.3 mm land pattern-ensuring reliable wetting without tombstoning or voiding in high-volume manufacturing.
TLVH431QDBVR,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:
- ±1.5%
- 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
TLVH431QDBVR,115 FAQ
1.How can I place an order for TLVH431QDBVR,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431QDBVR,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 TLVH431QDBVR,115 reliable?
The price and inventory of TLVH431QDBVR,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431QDBVR,115 is usually 5 days.
3.What payment methods are accepted for TLVH431QDBVR,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431QDBVR,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431QDBVR,115?
TLVH431QDBVR,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431QDBVR,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 TLVH431QDBVR,115?
For technical support, including TLVH431QDBVR,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431QDBVR,115 requirements.
6.How does Aetrix verify that TLVH431QDBVR,115 is sourced from the original manufacturer or authorized distributors?
All TLVH431QDBVR,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 TLVH431QDBVR,115 meets industry standards.
7.What is the process for return or replacement of TLVH431QDBVR,115?
All TLVH431QDBVR,115 units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431QDBVR,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 TLVH431QDBVR,115 part is unused and in its original packaging.
Return procedure for TLVH431QDBVR,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431QDBVR,115 Tags
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