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Texas Instruments TL430CLP
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- Part No.:
- TL430CLP
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
TL430CLP.pdf
- Description:
- IC VREF SHUNT ADJ 9.09% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,328
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Product details
Overview
TL430CLP from Texas Instruments is a 3-terminal adjustable shunt voltage regulator with programmable output (3 V to 30 V), 2.5 V reference input voltage, ±0.5% initial accuracy at 25°C, 1.5 Ω typical differential resistance, and 100 mA sink capability. It replaces discrete Zener diodes in precision feedback loops for linear regulators, SMPS, and voltage monitors.
For engineers reviewing the TL430CLP datasheet, TL430CLP pinout, TL430CLP application, or TL430CLP equivalent, key selection criteria include reference voltage stability over temperature (120 ppm/°C), low noise (200 µV RMS, 0.1–10 Hz), and TO-92 (LP) package compatibility with legacy through-hole power supply designs.
Technical Context
The TL430CLP operates as a precision shunt regulator where cathode current is controlled by an internal bandgap reference (2.5 V) and transconductance amplifier. Output voltage is set externally via two resistors forming a divider from cathode to anode, enabling stable regulation across 3 V–30 V without external compensation.
It features low dynamic impedance (1.5 Ω typ.) and low output noise (200 µV RMS), making it suitable for closed-loop feedback in switching converters and precision voltage references. Its 0°C to 70°C operating range and 150 mA absolute maximum cathode current support industrial-grade power management applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V (min), 2.75 V (typ), 3.0 V (max) - defines base accuracy of programmable output setting |
| Tempco | 120 ppm/°C - ensures ≤±1.2% output drift over full 0°C–70°C range |
| Differential Resistance | 1.5 Ω (typ), 3 Ω (max) - enables tight load regulation and fast transient response |
| Sink Current Range | 2 mA (min), 100 mA (max) - supports wide-range feedback biasing and crowbar protection |
| Noise Voltage | 200 µV RMS (0.1–10 Hz, VZ = 12 V) - critical for low-noise analog references and sensor excitation |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade embedded power systems |
| Package | TO-92 (LP), 3-pin through-hole - compatible with legacy PCB layouts and manual assembly |
Pinout & Package
TL430CLP uses a TO-92 (LP) plastic package with straight leads, 5.34 mm max height, and JEDEC TO-226 compliant outline. Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Reference (REF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current return path and voltage reference ground | Reference node for all internal measurements; tied to system ground or regulator output common |
| Cathode (Pin 2) | Regulated output terminal and current sink | Delivers precise sink current to maintain programmed VZ; connects to feedback node of DC-DC converter |
| Reference (Pin 3) | Internal bandgap reference input | Connects to resistor divider midpoint; sets VZ = VREF × (1 + R1/R2); high-impedance (≤10 µA input current) |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | Programmable from 3 V to 30 V using two external resistors - eliminates need for multiple fixed-voltage Zeners |
| Low output noise | 200 µV RMS (0.1–10 Hz) - preserves signal integrity in precision analog feedback paths |
| High sink current | Up to 100 mA continuous - enables direct drive of optocoupler LEDs or crowbar trigger circuits |
| Stable temperature performance | 120 ppm/°C tempco and guaranteed operation from 0°C to 70°C - reduces calibration burden in ambient-variable environments |
| Low differential resistance | 1.5 Ω typical - maintains <±1% load regulation across full current range |
Applications
| SMPS Feedback Loop | Overvoltage Protection |
|---|---|
|
Use Scenario: Primary-side feedback in isolated flyback converters using optocoupler coupling. IC Role / Device Role / Timing Role: Shunt regulator providing precise reference voltage to optocoupler LED anode, enabling accurate secondary-side voltage sensing. Use Value: Replaces Zener diode with tighter initial tolerance (±0.5%) and lower tempco, improving output voltage accuracy across line/load/temperature. |
Use Scenario: Crowbar circuit triggering thyristor when regulated rail exceeds safe threshold. IC Role / Device Role / Timing Role: Precision voltage comparator and current sink - REF pin senses rail voltage; cathode sinks gate current to fire SCR. Use Value: Enables 3 V–30 V programmable trip point with 120 ppm/°C stability, reducing false triggers vs. discrete Zener-based solutions. |
| Voltage Monitor | Series Regulator Control |
|
Use Scenario: Monitoring microcontroller VCC for brownout detection in industrial control modules. IC Role / Device Role / Timing Role: Adjustable threshold detector - REF pin connected to resistor divider from VCC, cathode pulls reset line low on fault. Use Value: Programmable trip point (e.g., 4.75 V) with 200 µV noise floor prevents chatter during marginal supply conditions. |
Use Scenario: Improving line/load regulation of fixed-output LDOs like µA7805 via external feedback. IC Role / Device Role / Timing Role: Precision error amplifier replacing internal bandgap - REF pin compares output to 2.5 V reference, cathode adjusts pass transistor bias. Use Value: Achieves <±0.5% output accuracy vs. ±2% typical for standalone 78xx regulators, without redesigning core topology. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACLP | Higher initial accuracy (±0.5% vs. ±1.0% for TL430C), same pinout and TO-92 package | Preferred for high-precision feedback where tighter reference tolerance is required | Select TL431ACLP when ±0.5% reference accuracy is mandatory; otherwise TL430CLP offers cost-effective performance for general-purpose regulation |
| LM431ACM | Same 2.5 V reference and 3-terminal architecture, but SOIC-8 package (surface-mount), higher tempco (200 ppm/°C) | Used where board space is constrained and reflow assembly is preferred over through-hole | Choose LM431ACM for SMT production; TL430CLP remains optimal for legacy through-hole designs requiring TO-92 footprint compatibility |
Compared with TL431ACLP and LM431ACM, the TL430CLP delivers proven commercial-grade stability in TO-92 packaging at lower unit cost, while maintaining sufficient accuracy (±1.0%) and noise performance for non-critical power supply feedback and monitoring tasks.
Availability
TL430CLP is available at Aetrix Electronics and suitable for SMPS feedback loops, overvoltage protection circuits, voltage monitors, and series regulator control requiring stable component supply and long-term obsolescence resilience.
Supply support for TL430CLP 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with over 50 years of innovation in precision analog ICs.
The TL430CLP belongs to TI's precision shunt regulator product line, designed specifically for cost-sensitive, through-hole power supply feedback, voltage monitoring, and protection applications in commercial-grade equipment.
FAQ
What is the reference voltage tolerance of TL430CLP at 25°C?
The TL430CLP has a reference input voltage (VI(ref)) of 2.5 V minimum, 2.75 V typical, and 3.0 V maximum at 25°C and IZ = 10 mA. This corresponds to ±1.0% initial accuracy relative to the nominal 2.5 V reference, confirmed in the electrical characteristics table of SLVS050D.
Can TL430CLP replace a standard Zener diode in a voltage reference circuit?
Yes, the TL430CLP can directly replace Zener diodes in most shunt reference applications. Unlike Zeners, it provides programmable output (3 V–30 V), lower dynamic impedance (1.5 Ω vs. >10 Ω for typical Zeners), and superior temperature stability (120 ppm/°C). The TL430CLP requires only two external resistors and operates with as little as 2 mA cathode current.
What is the maximum continuous cathode current rating for TL430CLP?
The TL430CLP supports up to 100 mA continuous cathode current under recommended operating conditions (IZ = 2–100 mA). Its absolute maximum rating is 150 mA, but sustained operation above 100 mA requires thermal derating based on ambient temperature and PCB copper area, per the θJA = 140°C/W specification.
Is TL430CLP RoHS compliant and what is its lead finish?
Yes, TL430CLP is RoHS compliant (lead-free) with Sn (tin) lead finish. Per TI's Packaging Information Addendum, the part marking "TL430C" appears on the TO-92 (LP) body, and the device meets JEDEC standards for commercial temperature range (0°C to 70°C) and moisture sensitivity level (N/A for through-hole packages).
How does TL430CLP achieve low output noise compared to discrete Zener solutions?
The TL430CLP achieves 200 µV RMS (0.1–10 Hz) noise through an integrated bandgap reference and optimized internal amplifier design, eliminating the high flicker noise inherent in Zener breakdown. Its noise performance is specified at VZ = 12 V and is significantly lower than typical 5.1 V Zeners (≥600 µV RMS), making it suitable for precision analog feedback paths in the TL430CLP application context.
TL430CLP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.75V
- Voltage - Output (Max):
- 30 V
- Current - Output:
- 100 mA
- Tolerance:
- ±9.09%
- Temperature Coefficient:
- 120ppm/°C
- Noise - 0.1Hz to 10Hz:
- 650µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 2 mA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
TL430CLP FAQ
1.How can I place an order for TL430CLP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL430CLP 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 TL430CLP reliable?
The price and inventory of TL430CLP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL430CLP is usually 5 days.
3.What payment methods are accepted for TL430CLP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL430CLP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL430CLP?
TL430CLP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL430CLP 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 TL430CLP?
For technical support, including TL430CLP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL430CLP requirements.
6.How does Aetrix verify that TL430CLP is sourced from the original manufacturer or authorized distributors?
All TL430CLP 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 TL430CLP meets industry standards.
7.What is the process for return or replacement of TL430CLP?
All TL430CLP units undergo pre-shipment inspection (PSI). If there is an issue with TL430CLP, 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 TL430CLP part is unused and in its original packaging.
Return procedure for TL430CLP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL430CLP Tags
-
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
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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