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Texas Instruments TL430CLPE3
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- Part No.:
- TL430CLPE3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
TL430CLPE3.pdf
- Description:
- IC VREF SHUNT ADJ 9.09% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,866
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Product details
Overview
TL430CLPE3 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 output resistance, and 100 mA sink capability. It replaces Zener diodes in precision voltage reference and overvoltage protection circuits.
For engineers reviewing the TL430CLPE3 datasheet, TL430CLPE3 pinout, TL430CLPE3 application, or TL430CLPE3 equivalent, key selection criteria include reference voltage tolerance, cathode current range (2–100 mA), thermal resistance (140°C/W), operating temperature (0°C to 70°C), and TO-92 (LP) package compatibility with legacy through-hole designs.
Technical Context
The TL430CLPE3 operates as a precision shunt regulator using an internal bandgap reference and error amplifier driving an NPN output transistor. Its regulation relies on external resistor feedback between cathode and reference terminals to set output voltage via VZ = VREF(1 + R1/R2).
It functions across a 2 mA to 100 mA cathode current range with low 200 µVpp (0.1–10 Hz) noise at 12 V output and maintains stability without external compensation due to inherent phase margin design optimized for resistive feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V (min), 2.75 V (typ), 3.0 V (max) - sets base accuracy of programmable output |
| Output Voltage Range | 3 V to 30 V - configured externally via two resistors, enabling flexible system-level voltage tailoring |
| Cathode Current Range | 2 mA to 100 mA - supports both low-power biasing and moderate-current sinking applications |
| Differential Output Resistance | 1.5 Ω (typ), 3 Ω (max) - ensures tight regulation under dynamic load changes |
| Temperature Coefficient | 120 ppm/°C - guarantees stable reference performance across 0°C to 70°C industrial range |
| Noise Voltage | 200 µV (0.1–10 Hz, VZ = 12 V) - critical for low-noise analog references and sensing front-ends |
| Absolute Max Cathode Voltage | 30 V - defines maximum safe shunt voltage before device breakdown |
| Thermal Resistance θJA | 140°C/W - determines power derating in TO-92 LP package at ambient temperatures |
Pinout & Package
TL430CLPE3 uses the TO-92 (LP) package - a 3-pin through-hole plastic case with straight leads, 5.34 mm max height, and JEDEC TO-226 AA compliance. Pin 1 is Anode, Pin 2 is Cathode, Pin 3 is Reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current return path and voltage reference ground | Serves as circuit common reference point; all voltages specified relative to this terminal |
| Cathode (Pin 2) | Regulated output node and current sink | Delivers programmed output voltage; sinks up to 100 mA to maintain regulation |
| Reference (Pin 3) | Feedback input for voltage setting | Connects to resistor divider midpoint; controls regulation by comparing to internal 2.5 V reference |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable shunt regulation | Enables precise output voltage tuning from 3 V to 30 V using only two external resistors |
| Low output impedance | 1.5 Ω typical differential resistance ensures minimal voltage droop under load transients |
| Low-frequency noise performance | 200 µVpp (0.1–10 Hz) supports high-resolution analog measurement and reference applications |
| Wide cathode current range | Operates reliably from 2 mA (standby) to 100 mA (active regulation), simplifying bias network design |
| Industrial temperature grade | Specified from 0°C to 70°C - suitable for commercial and industrial power supply environments |
Applications
| Overvoltage Protection Circuit | Programmable Voltage Reference |
|---|---|
Use Scenario: Monitors DC bus voltage in AC/DC adapters and shuts down switching controllers when threshold is exceeded. IC Role / Device Role / Timing Role: Shunt regulator acting as precision voltage comparator with crowbar trigger function. Use Value: Provides ±0.5% trip-point accuracy and fast response to overvoltage events without external op-amps or comparators. | Use Scenario: Supplies stable reference to ADCs, DACs, and sensor signal conditioners in data acquisition systems. IC Role / Device Role / Timing Role: Precision shunt reference replacing discrete Zener + buffer combinations. Use Value: Delivers 200 µVpp low-noise output and 120 ppm/°C drift, improving measurement repeatability over temperature. |
| Current-Limited Power Supply | 3-Terminal Regulator Output Control |
Use Scenario: Limits output current in linear regulators and lab bench supplies to prevent component damage during fault conditions. IC Role / Device Role / Timing Role: Adjustable current limiter using cathode current sensing and feedback control. Use Value: Enables programmable current limit (e.g., 1 A via external resistor) with <2 mA quiescent consumption. | Use Scenario: Adjusts output voltage of fixed-output LDOs (e.g., LM7805) by injecting current into their feedback or adjust pin. IC Role / Device Role / Timing Role: Programmable voltage-controlled current source controlling external regulator setpoint. Use Value: Allows retrofitting fixed regulators with adjustable outputs using only one IC and two resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACLP | Same pinout and electrical specs; tighter 2.495 V reference (±0.5% vs ±1.0% for TL430C), lower 0.2 Ω typical rz | Preferred where higher reference accuracy and lower output impedance are required | Select TL431ACLP for new designs needing improved precision; TL430CLPE3 remains valid for cost-sensitive legacy replacements |
| LM431ACM | SOIC-8 package, 2.5 V reference, 100 mA sink, but higher 2.5 Ω rz and 300 µVpp noise | Used in surface-mount designs where TO-92 footprint is unavailable | Choose LM431ACM only when SMT assembly is mandatory; not drop-in compatible due to package and thermal profile differences |
Compared with TL431ACLP and LM431ACM, TL430CLPE3 offers the lowest unit cost and proven reliability in through-hole power management, though with slightly relaxed reference accuracy and higher noise than TL431ACLP, and incompatible packaging versus LM431ACM.
Availability
TL430CLPE3 is available at Aetrix Electronics and suitable for overvoltage protection circuits, programmable voltage references, current-limited power supplies, and 3-terminal regulator output control requiring stable component supply and long-term industrial availability.
Supply support for TL430CLPE3 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.
The TL430 product line was designed for precision shunt regulation in cost-sensitive, space-constrained power management applications-emphasizing simplicity, robustness, and wide operating current range without external compensation.
FAQ
What is the reference voltage tolerance of TL430CLPE3 at 25°C?
The TL430CLPE3 has a reference input voltage (VI(ref)) of 2.5 V minimum, 2.75 V typical, and 3.0 V maximum at 25°C, corresponding to ±1.0% initial tolerance around the nominal 2.75 V value. This specification is confirmed in the Electrical Characteristics table of the SLVS050D datasheet under test condition IZ = 10 mA. The TL430CLPE3 does not guarantee tighter tolerance unless binned - standard grade units meet this range.
Can TL430CLPE3 replace a Zener diode directly in existing circuits?
Yes, TL430CLPE3 can directly replace many Zener diodes in shunt regulator configurations, provided the external resistor network is recalculated to set the desired output voltage using VZ = VREF(1 + R1/R2). Unlike Zeners, TL430CLPE3 offers superior temperature stability (120 ppm/°C), lower dynamic impedance (1.5 Ω), and programmability - but requires three terminals instead of two, so layout must accommodate the Reference pin connection.
What is the maximum continuous cathode current for TL430CLPE3?
The TL430CLPE3 supports up to 100 mA continuous cathode current under recommended operating conditions, with absolute maximum rating at 150 mA. However, sustained operation above 100 mA requires careful thermal design due to its 140°C/W junction-to-ambient thermal resistance in the TO-92 LP package. Derating is necessary above 25°C ambient to avoid exceeding the 150°C maximum junction temperature.
Does TL430CLPE3 require external compensation capacitors?
No, TL430CLPE3 does not require external compensation capacitors for stable operation. Its internal architecture provides sufficient phase margin across the full 2 mA to 100 mA cathode current range when used with standard resistive feedback networks. The SLVS050D datasheet confirms unconditional stability in Figures 5–11 application circuits, including shunt, series, and crowbar configurations.
What is the TO-92 LP package pin configuration for TL430CLPE3?
The TL430CLPE3 TO-92 LP package uses a standard 3-pin straight-lead configuration: Pin 1 (left when flat side faces viewer) is Anode, Pin 2 (center) is Cathode, and Pin 3 (right) is Reference. This matches the LP PACKAGE (TOP VIEW) diagram in the SLVS050D datasheet and is mechanically identical to industry-standard TO-92 variants used for shunt regulators.
TL430CLPE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
TL430CLPE3 FAQ
1.How can I place an order for TL430CLPE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL430CLPE3 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 TL430CLPE3 reliable?
The price and inventory of TL430CLPE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL430CLPE3 is usually 5 days.
3.What payment methods are accepted for TL430CLPE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL430CLPE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL430CLPE3?
TL430CLPE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL430CLPE3 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 TL430CLPE3?
For technical support, including TL430CLPE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL430CLPE3 requirements.
6.How does Aetrix verify that TL430CLPE3 is sourced from the original manufacturer or authorized distributors?
All TL430CLPE3 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 TL430CLPE3 meets industry standards.
7.What is the process for return or replacement of TL430CLPE3?
All TL430CLPE3 units undergo pre-shipment inspection (PSI). If there is an issue with TL430CLPE3, 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 TL430CLPE3 part is unused and in its original packaging.
Return procedure for TL430CLPE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL430CLPE3 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
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AZ431LANTR-G1
Diodes Incorporated
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