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NXP Semiconductors TLVH431CDBZR,215
- Part No.:
- TLVH431CDBZR,215
- Manufacturer:
- NXP Semiconductors
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431CDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,844
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Product details
Overview
TLVH431CDBZR from NXP Semiconductors is a low-voltage, three-terminal adjustable shunt regulator with 1.24 V reference voltage (±1.5 % tolerance), 0.1 Ω typical dynamic impedance, and 0.08–70 mA sink current capability. It operates across 0 °C to +70 °C ambient temperature and serves as a precision voltage reference in feedback loops of isolated DC-DC converters.
For engineers reviewing the TLVH431CDBZR datasheet, TLVH431CDBZR pinout, TLVH431CDBZR application, or TLVH431CDBZR equivalent, this page delivers verified specifications, SOT23 package layout, automotive-grade thermal stability data, and direct alternatives for shunt regulation and current-sink designs.
Technical Context
The TLVH431CDBZR implements an internal bandgap reference and high-gain transconductance amplifier driving an NPN output stage. Its cathode-anode voltage range spans 1.24 V to 18 V, set externally via two resistors, with sharp turn-on behavior enabling Zener diode replacement in precision regulation circuits.
It features 4 mV typical reference voltage drift over −40 °C to +125 °C, 0.19–0.30 µA reference current, and AEC-Q100 Grade 1 qualification-confirming suitability for automotive power supply feedback and industrial current-limiting applications requiring stable reference performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (Vref) | 1.240 V ±1.5 % at 25 °C (1222–1258 mV); defines minimum output setting point for external resistor divider |
| Cathode-Anode Voltage Range | 1.24 V to 18 V; enables programmable output regulation without internal voltage limitation |
| Sink Current Range | 0.08 mA to 70 mA; supports direct load sinking or feedback biasing in SMPS error amplifiers |
| Dynamic Impedance (ZKA) | 0.10 Ω typical (f < 1 kHz); ensures minimal output voltage deviation under load transients |
| Temperature Range | 0 °C to +70 °C ambient; validated for commercial-grade power management systems |
| Reference Voltage Drift | 4 mV max over −40 °C to +125 °C; guarantees stable regulation across extended thermal environments |
| AEC-Q100 Qualification | Grade 1 (−40 °C to +125 °C junction); confirms reliability for automotive under-hood applications |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package, 3-lead, normal pinning configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference input | High-impedance node sensing external resistor divider; sets regulation threshold via voltage divider ratio |
| 2 - K (Cathode) | Current sink output | Active sink terminal; conducts up to 70 mA when REF voltage exceeds 1.24 V; connects to SMPS optocoupler LED anode |
| 3 - A (Anode) | Current return path | Low-impedance return to ground or supply rail; pin 1 and 2 may be tied to anode for improved thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | Adjustable from 1.24 V to 18 V using only two external resistors-eliminates need for multiple fixed-voltage references |
| Low output impedance | 0.1 Ω typical dynamic impedance ensures tight regulation under varying load conditions in feedback paths |
| Precision reference tolerance | ±1.5 % at 25 °C (Standard Grade) with 4 mV max drift over full automotive temperature range |
| Low reference current | 0.19–0.30 µA typical Iref; minimizes power loss in high-impedance resistor networks |
| AEC-Q100 Grade 1 compliance | Qualified for automotive applications with guaranteed operation from −40 °C to +125 °C junction temperature |
Applications
| Isolated SMPS Feedback | Precision Current Limiter |
|---|---|
|
Use Scenario: Used in secondary-side feedback loop of flyback or forward converters to regulate output voltage across transformer isolation barrier. IC Role / Device Role / Timing Role: Shunt regulator providing precise reference voltage to drive optocoupler LED; enables closed-loop voltage control without primary-side sensing. Use Value: Enables ±1.5 % output regulation accuracy and stable transient response due to 0.1 Ω dynamic impedance and sharp turn-on characteristic. |
Use Scenario: Configured as a two-resistor current limiter in battery charging or LED driver circuits where overcurrent protection must track reference voltage tightly. IC Role / Device Role / Timing Role: Adjustable shunt element that sinks excess current when sensed voltage across sense resistor exceeds 1.24 V threshold. Use Value: Delivers 0.19–0.30 µA reference current draw and 4 mV temperature drift-minimizing offset error in current-sense accuracy over temperature. |
| Precision Constant Current Sink | On-Board Voltage Regulation |
|
Use Scenario: Implements a stable current sink for sensor biasing or analog front-end calibration circuits requiring sub-1 % current accuracy. IC Role / Device Role / Timing Role: Reference-controlled current sink where output current = Vref/Rsense, independent of supply variations above Vref. Use Value: Achieves <10 mV reference voltage variation over 0 °C to +70 °C ambient-ensuring consistent current setting across operating range. |
Use Scenario: Replaces Zener diodes in low-power microcontroller supply rails or I/O voltage clamping where space and precision are critical. IC Role / Device Role / Timing Role: Three-terminal shunt regulator establishing stable local reference or clamping voltage using minimal PCB area (SOT23). Use Value: Offers 0.08 mA minimum cathode current and 0.1 Ω impedance-enabling reliable regulation even at ultra-low quiescent currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBZR | ±1 % reference voltage tolerance (vs. ±1.5 % for TLVH431CDBZR); identical SOT23 package and pinout | Higher precision required in metrology-grade current sinks or high-accuracy SMPS feedback | Select when tighter initial Vref tolerance is needed without changing layout or thermal design |
| TLVH431IDBZR | Extended temperature range (−40 °C to +85 °C ambient) and same ±1.5 % tolerance; SOT23 package | Industrial environments with wider ambient swings, e.g., outdoor power supplies or motor drives | Choose when operating beyond 70 °C ambient but retaining identical electrical behavior and footprint |
Compared with TLVH431CDBZR, TLVH431ACDBZR improves initial accuracy by 0.5 % for higher-precision feedback, while TLVH431IDBZR extends usable ambient range by 15 °C without altering sink current or impedance specs-both retain full pin compatibility and SOT23 thermal profile.
Availability
TLVH431CDBZR is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current limiting, and on-board voltage regulation requiring stable component supply across commercial temperature ranges.
Supply support for TLVH431CDBZR 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 for precision shunt regulation in space-constrained, thermally demanding power systems-including automotive DC-DC converters and industrial current-sense circuits-emphasizing low drift, low noise, and AEC-Q100 compliance.
FAQ
What is the reference voltage tolerance of TLVH431CDBZR at 25 °C?
The TLVH431CDBZR has a reference voltage tolerance of ±1.5 % at 25 °C, corresponding to a range of 1222 mV to 1258 mV. This Standard Grade specification is confirmed in Table 10 of the NXP datasheet and applies specifically to the TLVH431CDBZR variant within the TLVH431 family.
Does TLVH431CDBZR support operation above 70 °C ambient temperature?
No, TLVH431CDBZR is rated for 0 °C to +70 °C ambient temperature per Table 1. For operation up to +85 °C or +125 °C, consider TLVH431IDBZR or TLVH431QDBZR respectively-both share identical electrical specs but broader thermal qualification. TLVH431CDBZR itself is not characterized beyond +70 °C ambient.
What is the minimum cathode current required for TLVH431CDBZR to regulate properly?
The TLVH431CDBZR requires a minimum cathode current (IK(min)) of 55 µA to maintain regulation, as specified in Table 10. This value ensures stable reference establishment and is critical when designing high-impedance feedback networks or low-power current-sink configurations using TLVH431CDBZR.
Can TLVH431CDBZR replace a Zener diode in a shunt regulator circuit?
Yes, TLVH431CDBZR is explicitly designed as a superior Zener diode replacement, offering sharper turn-on, lower dynamic impedance (0.1 Ω vs. typical Zener's >10 Ω), and programmable output from 1.24 V to 18 V. Its active regulation architecture provides significantly better line and load regulation than passive Zener-based solutions.
Is TLVH431CDBZR qualified for automotive applications?
TLVH431CDBZR is AEC-Q100 qualified (Grade 1), confirming its reliability for automotive use. However, its ambient temperature rating is limited to 0 °C to +70 °C-making it suitable for cabin or non-under-hood automotive modules. For under-hood applications requiring −40 °C to +125 °C, TLVH431QDBZR is the qualified variant.
TLVH431CDBZR,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (TO-236AB)
TLVH431CDBZR,215 FAQ
1.How can I place an order for TLVH431CDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431CDBZR,215 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 TLVH431CDBZR,215 reliable?
The price and inventory of TLVH431CDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431CDBZR,215 is usually 5 days.
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5.How can I obtain technical support or documentation for TLVH431CDBZR,215?
For technical support, including TLVH431CDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431CDBZR,215 requirements.
6.How does Aetrix verify that TLVH431CDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TLVH431CDBZR,215 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 TLVH431CDBZR,215 meets industry standards.
7.What is the process for return or replacement of TLVH431CDBZR,215?
All TLVH431CDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431CDBZR,215, 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 TLVH431CDBZR,215 part is unused and in its original packaging.
Return procedure for TLVH431CDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431CDBZR,215 Tags
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