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NXP Semiconductors TLVH431QDBVR,125
- Part No.:
- TLVH431QDBVR,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLVH431QDBVR,125.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
TLVH431QDBVR,125 from NXP Semiconductors is an AEC-Q100 Grade 1 qualified, low-voltage adjustable precision shunt regulator in SOT753 package, with 1 % reference voltage tolerance (1240 mV typ), −40 °C to +125 °C operating range, and 0.15 Ω typical dynamic cathode-anode impedance - used for isolated feedback loops in automotive SMPS designs.
For engineers reviewing the TLVH431QDBVR,125 datasheet, TLVH431QDBVR,125 pinout, TLVH431QDBVR,125 application, or TLVH431QDBVR,125 equivalent, key selection considerations include its automotive-grade thermal stability, 70 mA sink current capability, 4 mV max reference drift over full temperature range, and compatibility with low-ESR output capacitors in flyback feedback networks.
Technical Context
The TLVH431QDBVR,125 implements a precision bandgap-based reference amplifier driving an NPN output stage, enabling sharp turn-on and stable regulation across 1.24 V to 18 V via external resistor divider. Its internal architecture supports operation down to 1.24 V cathode-anode voltage with 55 μA minimum cathode current.
Designed for automotive isolation applications, it features 4 kV HBM ESD rating, 0.19–0.30 μA reference current, and −0.5 to −1.5 mV/V cathode-voltage sensitivity - ensuring predictable error budgeting in optocoupler-coupled feedback paths of DC/DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1240 mV typical (A-Grade), ±1 % tolerance at 25 °C - enables accurate output voltage setting in regulated power supplies |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive environments without derating |
| Cathode Current Range | 0.08 mA to 70 mA - supports both low-power biasing and high-current shunt regulation |
| Dynamic Impedance | 0.15 Ω typical (SOT753) - ensures minimal output voltage deviation under load transients |
| Reference Drift | 4 mV max over −40 °C to +125 °C - guarantees stable regulation across full automotive thermal profile |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C) - certified for critical automotive power systems |
| ESD Rating | 4 kV HBM - robust against handling and board-level electrostatic discharge |
Pinout & Package
SOT753 (SC-74A) plastic surface-mounted package with 5 leads; pin 1 and 2 are not connected (n.c.), providing layout flexibility and thermal isolation for anode connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | n.c. | No internal connection - usable as thermal pad or ground tie with no electrical function |
| 2 | n.c. | No internal connection - allows PCB copper pour for improved heat dissipation without short risk |
| 3 | Cathode (k) | Main current sink terminal - connects to SMPS output via optocoupler LED or directly to regulated rail |
| 4 | Reference (REF) | High-impedance input sensing node - sets output voltage via resistor divider to anode and ground |
| 5 | Anode (a) | Return path for cathode current - must be thermally anchored to PCB for sustained 70 mA operation |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Range | 1.24 V to 18 V set by two external resistors - eliminates need for multiple fixed-voltage references |
| Low Output Noise | Enables clean feedback signals in sensitive analog control loops without added filtering |
| Sharp Turn-On Characteristic | Minimizes regulation hysteresis in switching power supply feedback, improving transient response |
| Thermal Stability | 4 mV max ΔVref over −40 °C to +125 °C - reduces calibration burden in automotive temperature cycling |
| Low Reference Current | 0.19–0.30 μA typical - permits use of high-value resistors in feedback dividers, lowering power loss |
Applications
| Automotive Isolated SMPS Feedback | Precision Shunt Regulator |
|---|---|
Use Scenario: Primary-side feedback in 12 V automotive flyback converter with optocoupler isolation. IC Role / Device Role / Timing Role: Adjustable shunt reference generating precise error signal for optocoupler LED drive. Use Value: Maintains ±1 % output regulation across −40 °C to +125 °C ambient without secondary-side sensing. |
Use Scenario: On-board 3.3 V LDO pre-regulator using TLVH431QDBVR,125 as active zener replacement. IC Role / Device Role / Timing Role: Precision voltage reference controlling series pass transistor base current. Use Value: Delivers lower temperature drift and tighter tolerance than discrete Zener diodes in space-constrained modules. |
| Precision Constant Current Sink | Isolated Battery Charger Monitor |
Use Scenario: LED bias current source in automotive interior lighting with thermal compensation. IC Role / Device Role / Timing Role: Shunt regulator configured as grounded current sink with sense resistor on cathode. Use Value: Provides 0.1 % current accuracy over temperature using only one external resistor. |
Use Scenario: Secondary-side voltage monitoring in isolated 48 V battery charger with galvanic separation. IC Role / Device Role / Timing Role: Reference element in opto-isolated feedback loop detecting overvoltage fault condition. Use Value: Enables fast, reliable overvoltage shutdown (<10 μs response) while meeting reinforced insulation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AQDBVR | Same SOT753 package, identical A-Grade (1 %) spec, but marked AB6 instead of AB3; identical electrical performance and thermal rating | No functional difference - same automotive qualification, pinout, and operating conditions | Select TLVH431AQDBVR only if AB6 marking aligns with legacy BOM or traceability requirements |
| TLVH431DQDBVR | D-Grade (0.75 %) reference tolerance, otherwise identical SOT753 package, temperature range, and sink current capability | Higher initial accuracy required - suitable where tighter output voltage tolerance justifies marginal cost increase | Choose TLVH431DQDBVR when system-level calibration budget demands sub-1 % reference contribution |
Compared with TLVH431AQDBVR, TLVH431QDBVR,125 offers identical performance with different marking; versus TLVH431DQDBVR, it trades 0.25 % tolerance margin for broader availability and lower unit cost in AEC-Q100-compliant designs.
Availability
TLVH431QDBVR,125 is available at Aetrix Electronics and suitable for automotive power conversion, industrial isolated feedback, and precision current limiting applications requiring stable component supply across extended temperature ranges.
Supply support for TLVH431QDBVR,125 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with leadership in automotive-grade analog and power management ICs.
The TLVH431 family was designed specifically for high-reliability isolated feedback in automotive switch-mode power supplies, emphasizing thermal stability, low noise, and AEC-Q100 compliance from inception.
FAQ
What is the reference voltage tolerance of TLVH431QDBVR,125?
The TLVH431QDBVR,125 has an A-Grade reference voltage tolerance of ±1 % at 25 °C, with a typical value of 1240 mV and guaranteed range of 1228 mV to 1252 mV - verified per NXP's Product Data Sheet Rev. 1 (2012).
Does TLVH431QDBVR,125 support operation at 125 °C junction temperature?
Yes, TLVH431QDBVR,125 is rated for operation up to +125 °C ambient temperature and has a maximum junction temperature of 150 °C. Its AEC-Q100 Grade 1 qualification confirms reliability under sustained high-temperature automotive conditions.
What is the cathode-anode voltage limit for TLVH431QDBVR,125?
The absolute maximum cathode-anode voltage (VKA) for TLVH431QDBVR,125 is 20 V, with recommended operating range from Vref (≈1.24 V) up to 18 V - enabling use in 12 V and 24 V automotive systems with headroom for transients.
How many pins does TLVH431QDBVR,125 have, and what are their functions?
TLVH431QDBVR,125 uses a 5-pin SOT753 package: pins 1 and 2 are not connected (n.c.), pin 3 is Cathode (k), pin 4 is Reference (REF), and pin 5 is Anode (a) - confirmed in Table 5 and Figure 31 of the NXP datasheet.
Is TLVH431QDBVR,125 compatible with standard SOT753 footprint designs?
Yes, TLVH431QDBVR,125 adheres to the SC-74A outline with standardized 0.95 mm pitch and 2.825 mm × 1.95 mm body dimensions - matching IPC-7351B SOT753 land patterns and supporting reflow and wave soldering per Figures 34–35.
TLVH431QDBVR,125 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,125 FAQ
1.How can I place an order for TLVH431QDBVR,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431QDBVR,125 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,125 reliable?
The price and inventory of TLVH431QDBVR,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431QDBVR,125 is usually 5 days.
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Once your TLVH431QDBVR,125 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,125?
For technical support, including TLVH431QDBVR,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431QDBVR,125 requirements.
6.How does Aetrix verify that TLVH431QDBVR,125 is sourced from the original manufacturer or authorized distributors?
All TLVH431QDBVR,125 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,125 meets industry standards.
7.What is the process for return or replacement of TLVH431QDBVR,125?
All TLVH431QDBVR,125 units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431QDBVR,125, 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,125 part is unused and in its original packaging.
Return procedure for TLVH431QDBVR,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431QDBVR,125 Tags
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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