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NXP Semiconductors TLVH431AQDBVR,125
- Part No.:
- TLVH431AQDBVR,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLVH431AQDBVR,125.pdf
- Description:
- IC VREF SHUNT 18V 1% 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,825
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Product details
Overview
TLVH431AQDBVR,125 from NXP Semiconductors is an A-grade (1 % reference voltage tolerance), automotive-qualified (AEC-Q100 Grade 1), adjustable precision shunt regulator in SOT753 package, with 1.24 V reference voltage, 0.15 Ω typical dynamic cathode-anode impedance, and −40 °C to +125 °C operating range - used for isolated feedback in automotive SMPS designs.
For engineers reviewing the TLVH431AQDBVR,125 datasheet, TLVH431AQDBVR,125 pinout, TLVH431AQDBVR,125 application, or TLVH431AQDBVR,125 equivalent, key selection criteria include reference voltage accuracy at temperature extremes, sink current capability up to 70 mA, low output impedance for stable regulation, and AEC-Q100 qualification for under-hood power supply feedback loops.
Technical Context
The TLVH431AQDBVR,125 implements a precision bandgap-based reference amplifier driving an NPN output stage, enabling sharp turn-on and low-output-impedance shunt regulation. Its internal architecture supports programmable output voltages from 1.24 V to 18 V via two external resistors without requiring external compensation in most configurations.
It operates across −40 °C to +125 °C with 4 mV typical reference voltage drift over that range, maintains 0.19–0.30 µA reference current, and delivers stable performance in isolated feedback topologies where primary-side sensing demands high thermal stability and low noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (Vref) | 1240 mV ±12 mV at 25 °C (A-grade tolerance = ±1 %); enables precise setpoint control in feedback networks |
| Cathode Current Range | 0.08 mA to 70 mA; supports wide load regulation margin in shunt and current-sink applications |
| Dynamic Impedance (ZKA) | 0.15 Ω typical (f < 1 kHz); ensures minimal output voltage deviation under transient load changes |
| Temperature Range | −40 °C to +125 °C; qualified for engine compartment and transmission control unit environments |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C); certified for automotive safety-critical power supply monitoring |
| Output Voltage Range | Programmable from 1.24 V to 18 V using two external resistors; eliminates need for multiple fixed-voltage regulators |
Pinout & Package
SOT753 (SC-74A) 5-pin plastic surface-mounted package with exposed anode pad for enhanced thermal dissipation; pin 1 and 2 are no-connect (n.c.), pin 3 is cathode, pin 4 is reference, pin 5 is anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | n.c. | No electrical connection; mechanical support only |
| 2 | n.c. | No electrical connection; mechanical support only |
| 3 | Cathode (K) | Main current sink path; connects to regulated output node in feedback loop |
| 4 | Reference (REF) | Sense input for internal error amplifier; sets output voltage via resistor divider |
| 5 | Anode (A) | Return path to ground or low-side rail; also serves as thermal pad on PCB |
Key Features
| Feature | Design Value |
|---|---|
| 1 % reference voltage tolerance | Enables tighter output voltage regulation in automotive SMPS vs. standard 1.5 % grade parts |
| 0.15 Ω dynamic cathode-anode impedance | Minimizes output ripple and improves transient response in closed-loop feedback systems |
| AEC-Q100 Grade 1 qualification | Validates reliability for under-hood automotive applications including ADAS power supplies |
| Low 0.19–0.30 µA reference current | Reduces bias network power loss and enables high-resistance divider designs for low-quiescent operation |
Applications
| Automotive Isolated SMPS Feedback | Precision Current Sink |
|---|---|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters powering infotainment ECUs. IC Role / Device Role / Timing Role: Shunt regulator providing optocoupler bias current and precise voltage reference for isolation barrier feedback. Use Value: Maintains ±1 % output regulation across −40 °C to +125 °C, reducing need for secondary-side post-regulation. | Use Scenario: Constant-current LED driver for adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Precision current sink controlling LED string current independent of supply variations. Use Value: Delivers stable 50–70 mA sink current with <4 mV reference drift, ensuring consistent lumen output over temperature. |
| On-Board Voltage Regulation | Precision Current Limiter |
Use Scenario: Local 3.3 V or 5 V regulation for microcontroller I/O rails in body control modules. IC Role / Device Role / Timing Role: Adjustable shunt regulator replacing Zener diodes in low-power auxiliary supplies. Use Value: Achieves lower output impedance (0.15 Ω) than discrete Zeners, improving line/load regulation by >3×. | Use Scenario: Overcurrent protection for CAN transceiver power rails in gateway ECUs. IC Role / Device Role / Timing Role: Programmable current limiter clamping supply current before fault propagation. Use Value: Sets accurate trip threshold (e.g., 120 mA) using external resistors, with <0.1 % drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431DQDBVR | 0.75 % reference tolerance; otherwise identical pinout, package, and temperature range | Better reference accuracy for high-precision feedback; higher cost and longer lead time | Select when ±0.75 % Vref stability is required over full temperature range |
| TLVH431AQDBZR | SOT23-3 package (3-pin); same A-grade tolerance and −40 °C to +125 °C rating | Lower thermal resistance but reduced current handling (max 60 mA vs. 70 mA); no dedicated thermal pad | Choose for space-constrained layouts where 70 mA sink current is not required |
Compared with TLVH431DQDBVR, the TLVH431AQDBVR,125 trades 0.25 % reference accuracy for broader availability and lower cost; versus TLVH431AQDBZR, it provides superior thermal performance and 10 mA higher sink current capacity due to SOT753's anode pad and 5-pin layout.
Availability
TLVH431AQDBVR,125 is available at Aetrix Electronics and suitable for automotive power management, isolated DC-DC converter feedback, and precision current sink applications requiring stable component supply across extended temperature ranges.
Supply support for TLVH431AQDBVR,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 applications, with leadership in automotive-grade analog and power management ICs.
The TLVH431 family was designed specifically for high-reliability, temperature-stable shunt regulation in automotive power supplies - emphasizing AEC-Q100 compliance, low drift, and robustness in noisy, thermally aggressive environments.
FAQ
What is the reference voltage tolerance of TLVH431AQDBVR,125?
The TLVH431AQDBVR,125 has a reference voltage tolerance of ±1 % (A-grade), meaning its 1.24 V nominal reference voltage falls between 1.228 V and 1.252 V at 25 °C. This tolerance holds across the full −40 °C to +125 °C operating range, with total variation limited to ±4 mV typical, making TLVH431AQDBVR,125 suitable for automotive feedback circuits demanding tight regulation.
Does TLVH431AQDBVR,125 require external compensation in SMPS feedback designs?
TLVH431AQDBVR,125 does not require external compensation in most isolated SMPS feedback configurations when used with standard optocoupler CTR and recommended load capacitance (1–10 nF). Stability boundaries are defined in Figures 21–23 of the datasheet, and TLVH431AQDBVR,125 maintains phase margin >45° across −40 °C to +125 °C with proper capacitor ESR selection - eliminating need for additional RC networks in typical automotive flyback designs.
What is the maximum cathode current supported by TLVH431AQDBVR,125?
The TLVH431AQDBVR,125 supports a maximum cathode current of 70 mA under recommended operating conditions. At ambient temperatures up to +125 °C, derating applies per Figure 3 (SOT753 power derating curve), limiting continuous current to ~55 mA at +125 °C on FR4 PCB. The device remains functional up to 80 mA absolute maximum (per Table 6), but sustained operation above 70 mA risks thermal shutdown or accelerated aging - TLVH431AQDBVR,125 is rated for reliable 70 mA operation within its specified thermal envelope.
How does the SOT753 package of TLVH431AQDBVR,125 improve thermal performance over SOT23?
The SOT753 package of TLVH431AQDBVR,125 features a dedicated anode pad (pin 5) that serves as both electrical terminal and thermal conduction path to the PCB. With Rth(j-a) = 180 K/W (ceramic PCB) vs. 155 K/W for SOT23, the SOT753 enables higher power dissipation - TLVH431AQDBVR,125 sustains 70 mA at +125 °C where equivalent SOT23 variants derate to ~60 mA, directly extending usable current range in high-temperature automotive applications.
Is TLVH431AQDBVR,125 compatible with standard SOT753 footprint and reflow profiles?
Yes, TLVH431AQDBVR,125 uses the standard SC-74A (SOT753) outline per Figure 31 and reflow soldering footprint in Figure 34. It complies with JEDEC J-STD-020 moisture sensitivity level 1 and supports standard lead-free reflow profiles (peak 260 °C, 30 s max). The marking "AB6" (per Table 4) confirms correct orientation and package identity - TLVH431AQDBVR,125 integrates seamlessly into automated SMT lines using industry-standard SOT753 tooling and stencil designs.
TLVH431AQDBVR,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%
- 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
TLVH431AQDBVR,125 FAQ
1.How can I place an order for TLVH431AQDBVR,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431AQDBVR,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 TLVH431AQDBVR,125 reliable?
The price and inventory of TLVH431AQDBVR,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431AQDBVR,125 is usually 5 days.
3.What payment methods are accepted for TLVH431AQDBVR,125?
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4.How is shipping managed for TLVH431AQDBVR,125?
TLVH431AQDBVR,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431AQDBVR,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 TLVH431AQDBVR,125?
For technical support, including TLVH431AQDBVR,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431AQDBVR,125 requirements.
6.How does Aetrix verify that TLVH431AQDBVR,125 is sourced from the original manufacturer or authorized distributors?
All TLVH431AQDBVR,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 TLVH431AQDBVR,125 meets industry standards.
7.What is the process for return or replacement of TLVH431AQDBVR,125?
All TLVH431AQDBVR,125 units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431AQDBVR,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 TLVH431AQDBVR,125 part is unused and in its original packaging.
Return procedure for TLVH431AQDBVR,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431AQDBVR,125 Tags
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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