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NXP Semiconductors TLVH431DQDBVR,125
- Part No.:
- TLVH431DQDBVR,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLVH431DQDBVR,125.pdf
- Description:
- IC VREF SHUNT ADJ 0.75% 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,577
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Product details
Overview
TLVH431DQDBVR,125 from NXP Semiconductors is a low-voltage, three-terminal adjustable shunt regulator with 0.75 % reference voltage tolerance (1231–1249 mV at 25 °C), −40 °C to +125 °C operating range, 0.1 Ω typical dynamic cathode-anode impedance, and AEC-Q100 Grade 1 qualification for automotive feedback loops.
For engineers reviewing the TLVH431DQDBVR,125 datasheet, TLVH431DQDBVR,125 pinout, TLVH431DQDBVR,125 application, or TLVH431DQDBVR,125 equivalent, this page delivers verified specifications, SOT753 package details, thermal resistance data, stability guidance for isolated SMPS feedback, and precise D-grade tolerance implications for precision current sink design.
Technical Context
The TLVH431DQDBVR,125 implements an internal bandgap reference and high-gain transconductance amplifier driving an NPN output stage, enabling sharp turn-on and stable regulation across 1.24 V to 18 V via external resistor dividers. Its mirrored pinning (Pin 1 = cathode, Pin 2 = REF, Pin 3 = anode, Pins 4–5 = n.c.) supports layout optimization in space-constrained automotive modules.
Designed for operation up to 125 °C ambient, it maintains ≤4 mV reference drift over −40 °C to +125 °C and exhibits low 0.01–0.05 µA off-state current at 18 V, critical for battery-backed systems. The 0.15–0.20 Ω dynamic impedance (SOT753) ensures minimal output voltage variation under load transients in precision current-limiting applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage Tolerance | 0.75 % (1231–1249 mV @ 25 °C); enables ±0.93 mV absolute error in 1.24 V reference setting for high-accuracy current sinks. |
| Operating Temperature Range | −40 °C to +125 °C; qualified for under-hood automotive environments and industrial power supply feedback paths. |
| Cathode Current Range | 0.08 mA to 70 mA; supports direct sinking of control signals or biasing of optocouplers without external amplification. |
| Dynamic Cathode-Anode Impedance | 0.15–0.20 Ω (f < 1 kHz); minimizes output voltage deviation during fast load steps in isolated SMPS feedback networks. |
| Reference Voltage Drift | ≤4 mV over −40 °C to +125 °C; ensures stable setpoint accuracy across full automotive thermal profile without calibration. |
| AEC-Q100 Qualification | Grade 1 (−40 °C to +125 °C); certifies reliability for safety-critical automotive subsystems including body control modules and ADAS power rails. |
Pinout & Package
SOT753 (SC-74A) plastic surface-mounted package with 5 leads; pins 1 and 2 are not connected; pin 3 = cathode, pin 4 = reference, pin 5 = anode. Thermal pad on anode improves power dissipation capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | n.c. | No connection; electrically isolated; must remain unconnected per datasheet. |
| 2 | n.c. | No connection; electrically isolated; must remain unconnected per datasheet. |
| 3 | Cathode (k) | Main current sink path; connects to regulated output node or optocoupler anode in isolated feedback designs. |
| 4 | Reference (REF) | Sense input for voltage divider; sets output voltage via R1/R2 ratio; draws only 0.19–0.30 µA typical. |
| 5 | Anode (a) | Return path to ground or low-side rail; large copper pad recommended for thermal management up to 700 mW. |
Key Features
| Feature | Design Value |
|---|---|
| 0.75 % reference voltage tolerance | Reduces output voltage error budget by 50 % vs. standard-grade variants, enabling tighter current regulation in battery protection circuits. |
| Low 0.15–0.20 Ω dynamic impedance | Maintains <±1 mV output variation under 10 mA load steps, critical for stable optocoupler biasing in flyback converters. |
| AEC-Q100 Grade 1 qualification | Validates long-term reliability in automotive ambient conditions without derating, supporting 15-year vehicle lifecycle requirements. |
| −40 °C to +125 °C operation | Eliminates need for external temperature compensation in engine control units and DC-DC converter feedback loops. |
| Low 0.01–0.05 µA off-state current | Minimizes quiescent drain in always-on battery monitoring systems, extending shelf life in parked vehicles. |
Applications
| Automotive Isolated Feedback Loop | Precision Constant Current Sink |
|---|---|
|
Use Scenario: Secondary-side voltage regulation in 12 V automotive flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Shunt regulator providing precise 2.5 V reference to optocoupler LED, enabling accurate primary-side duty cycle adjustment. Use Value: 0.75 % tolerance and 4 mV drift ensure ±0.5 % output voltage regulation across temperature, meeting OEM power supply specs. |
Use Scenario: Battery charge current limiting in 48 V mild-hybrid systems with microcontroller-controlled setpoint. IC Role / Device Role / Timing Role: Adjustable current sink where REF pin voltage is controlled by DAC, setting IOUT = VREF/RS. Use Value: Low 0.19–0.30 µA reference current enables direct DAC drive without buffer, reducing BOM count and PCB area. |
| On-Board Precision Shunt Regulator | Industrial SMPS Voltage Monitor |
|
Use Scenario: Local 3.3 V regulation for MCU peripherals in space-constrained infotainment head units. IC Role / Device Role / Timing Role: Three-terminal shunt regulator replacing Zener diodes, configured with R1/R2 to set 3.3 V output. Use Value: Sharp turn-on characteristic and 0.20 Ω impedance prevent output sag during digital load transients, improving signal integrity. |
Use Scenario: Overvoltage protection trigger in programmable lab power supplies with user-adjustable limits. IC Role / Device Role / Timing Role: Precision voltage comparator reference feeding into external comparator; trip point set by resistor divider. Use Value: 0.75 % tolerance ensures ±25 mV accuracy on 3.3 V trip threshold, meeting Class II safety margin 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 | 1 % reference tolerance (1228–1252 mV), same SOT753 package and −40 °C to +125 °C range. | Lower accuracy requirement; acceptable for non-safety-critical feedback where ±10 mV error is tolerable. | Select when cost sensitivity outweighs need for sub-1 mV reference error in production volume automotive modules. |
| TLVH431QDBVR | 1.5 % reference tolerance (1222–1258 mV), same SOT753 package and −40 °C to +125 °C range. | General-purpose regulation where thermal drift dominates error budget more than initial tolerance. | Choose for cost-optimized industrial power supplies where AEC-Q100 compliance is retained but tighter tolerance is unnecessary. |
Compared with TLVH431AQDBVR and TLVH431QDBVR, the TLVH431DQDBVR,125 delivers the highest initial accuracy (0.75 %) and lowest drift (≤4 mV) in the family-critical when system-level error budgets demand <±1 mV contribution from the reference element in safety-critical automotive feedback paths.
Availability
TLVH431DQDBVR,125 is available at Aetrix Electronics and suitable for automotive power supply feedback, precision current limiting, and industrial SMPS voltage monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TLVH431DQDBVR,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 precision voltage reference and current regulation in automotive power systems, emphasizing AEC-Q100 compliance, wide temperature operation, and low-drift performance in isolated feedback architectures.
FAQ
What is the reference voltage tolerance of TLVH431DQDBVR,125 and how does it impact precision design?
The TLVH431DQDBVR,125 has a 0.75 % reference voltage tolerance (1231–1249 mV at 25 °C), the tightest in the TLVH431 family. This reduces absolute error in resistor-divider-based output voltage or current settings-e.g., enabling ±0.93 mV accuracy at 1.24 V reference-making TLVH431DQDBVR,125 ideal for automotive battery monitors and high-accuracy SMPS feedback where tighter error budgets are mandatory.
Does TLVH431DQDBVR,125 support operation at 125 °C ambient temperature?
Yes, TLVH431DQDBVR,125 is rated for −40 °C to +125 °C ambient operation and is AEC-Q100 Grade 1 qualified. Its reference voltage variation remains ≤4 mV across this full range, and its thermal resistance (Rth(j-a) = 180 K/W on ceramic PCB) ensures reliable junction temperature control in under-hood automotive modules-confirming TLVH431DQDBVR,125 suitability for engine control unit power rails.
What is the pin configuration of TLVH431DQDBVR,125 and why does it matter for layout?
TLVH431DQDBVR,125 uses SOT753 with mirrored pinning: Pin 1 = n.c., Pin 2 = n.c., Pin 3 = cathode, Pin 4 = REF, Pin 5 = anode. Unlike normal-pinning SOT23 variants, this layout isolates REF from cathode noise and allows direct anode grounding to large copper areas-critical for thermal management and noise immunity in high-density automotive PCBs where TLVH431DQDBVR,125 is deployed.
How does the dynamic cathode-anode impedance of TLVH431DQDBVR,125 affect SMPS feedback stability?
TLVH431DQDBVR,125 exhibits 0.15–0.20 Ω dynamic cathode-anode impedance (f < 1 kHz), ensuring minimal output voltage perturbation during fast optocoupler LED current changes in isolated flyback converters. This low impedance directly improves phase margin and suppresses ringing in TLVH431DQDBVR,125-based feedback loops-verified in NXP's stability boundary analysis (Fig 21–23) for CL ≥ 1 nF.
Is TLVH431DQDBVR,125 pin-compatible with other TLVH431 variants in SOT753?
No-TLVH431DQDBVR,125 uses mirrored pinning (cathode on Pin 3, REF on Pin 4), while TLVH431QDBVR and TLVH431AQDBVR also use mirrored pinning per Table 5, making them mechanically compatible but requiring verification of marking codes and tolerance grade. TLVH431DQDBVR,125 is not pin-compatible with normal-pinning SOT23 variants like TLVH431DQDBZR, and PCB layout must match SOT753 footprint dimensions (3.1 × 1.7 mm).
TLVH431DQDBVR,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:
- ±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,125 FAQ
1.How can I place an order for TLVH431DQDBVR,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431DQDBVR,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 TLVH431DQDBVR,125 reliable?
The price and inventory of TLVH431DQDBVR,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431DQDBVR,125 is usually 5 days.
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TLVH431DQDBVR,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431DQDBVR,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 TLVH431DQDBVR,125?
For technical support, including TLVH431DQDBVR,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431DQDBVR,125 requirements.
6.How does Aetrix verify that TLVH431DQDBVR,125 is sourced from the original manufacturer or authorized distributors?
All TLVH431DQDBVR,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 TLVH431DQDBVR,125 meets industry standards.
7.What is the process for return or replacement of TLVH431DQDBVR,125?
All TLVH431DQDBVR,125 units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431DQDBVR,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 TLVH431DQDBVR,125 part is unused and in its original packaging.
Return procedure for TLVH431DQDBVR,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431DQDBVR,125 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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