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Texas Instruments TL430ILP
- Part No.:
- TL430ILP
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
TL430ILP.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:5,562
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Product details
Overview
TL430ILP from Texas Instruments is a 3-terminal adjustable shunt voltage regulator with programmable output (3 V to 30 V), 2.5 V reference input, ±120 ppm/°C temperature coefficient, 1.5 Ω differential resistance, and 100 mA sink capability - used in precision feedback loops for linear regulators, SMPS, and overvoltage protection circuits.
For engineers reviewing the TL430ILP datasheet, TL430ILP pinout, TL430ILP application, or TL430ILP equivalent, key selection criteria include reference voltage accuracy, thermal stability across 0°C–70°C, low-noise operation (200 µV RMS, 0.1–10 Hz), and TO-92 (LP) package compatibility with legacy through-hole power supply designs.
Technical Context
The TL430ILP operates as a precision shunt regulator where cathode current is controlled by an internal bandgap reference (2.5 V) and high-gain transconductance amplifier. Output voltage is set externally via two resistors forming a voltage divider from cathode to anode.
It functions in both shunt and series configurations - enabling current limiting, crowbar protection, and output control of fixed LDOs - with regulation maintained down to 0.5 mA cathode current and up to 100 mA continuous sink, while maintaining <3 Ω dynamic impedance across its operating range.
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 ≤0.2% output drift over 0°C to 70°C ambient |
| Differential Resistance | 1.5 Ω (typ), 3 Ω (max) - determines load regulation error and ripple rejection |
| Sink Current Range | 0.5 mA to 100 mA - supports stable regulation from light-load biasing to high-current clamping |
| Noise Voltage | 200 µV RMS (0.1–10 Hz, VZ = 12 V) - critical for low-noise feedback paths in precision supplies |
| Max Regulator Voltage | 30 V - sets upper limit for programmable output and safe operating voltage headroom |
Pinout & Package
TL430ILP uses the TO-92 (LP) package - 3-pin, straight or formed leads, 5.34 mm max height, lead pitch 2.54 mm, RoHS-compliant tin (Sn) finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Reference ground node | Return path for reference current (II(ref)); tied to system ground in most shunt configurations |
| Pin 2 (Cathode) | Output/sink terminal | Delivers regulated voltage; sinks current into external load or feedback network |
| Pin 3 (Ref) | Reference input | High-impedance (≤10 µA) node sensing divided output; sets regulation point via resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | Programmable from 3 V to 30 V using only two external resistors - eliminates need for multiple Zener diodes |
| Low output noise | 200 µV RMS (0.1–10 Hz) enables stable feedback in low-noise LDOs and analog power rails |
| Wide cathode current range | Operates reliably from 0.5 mA to 100 mA - supports both biasing and active clamping roles |
| Low temperature drift | ±120 ppm/°C tempco ensures <0.15% output variation across full 0°C–70°C industrial range |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Closed-loop voltage regulation in isolated flyback or forward converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Shunt regulator providing precise reference to optocoupler LED drive circuit - sets secondary-side output voltage. Use Value: Replaces discrete Zener + transistor with ±1% initial accuracy and tighter thermal drift, improving cross-regulation and transient response. | Use Scenario: Monitoring DC bus voltage in motor drives or battery chargers to trigger shutdown before damage occurs. IC Role / Device Role / Timing Role: Precision voltage threshold detector driving SCR gate or comparator input in crowbar topology. Use Value: Enables accurate trip point (e.g., 28.5 V ±0.3 V) with minimal component count and no calibration required. |
| Linear Regulator Output Control | Current Limiting Circuit |
Use Scenario: Adjusting output of fixed-voltage LDOs (e.g., µA7805) to non-standard values like 7.5 V or 12.3 V. IC Role / Device Role / Timing Role: External feedback element replacing internal resistor divider - modifies regulation setpoint without redesigning IC. Use Value: Achieves programmable output with <1% error using standard catalog LDOs, reducing BOM complexity. | Use Scenario: Protecting sensitive loads (e.g., microcontroller I/O) from overcurrent during short-circuit events. IC Role / Device Role / Timing Role: Constant-current sink controlling base drive of series pass transistor in adjustable current limiter. Use Value: Provides smooth, temperature-stable current limit (e.g., 1.2 A ±5%) without sense resistor heating errors. |
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, 2.495 V reference (±0.5% initial tolerance vs. TL430ILP's ±1.2%), lower tempco (±50 ppm/°C) | Better accuracy and stability for high-precision feedback; requires tighter resistor tolerance for same output error | Preferred when reference accuracy <0.5% and tempco <60 ppm/°C are required |
| LM4040CIM3-2.5 | Fixed 2.5 V shunt reference (no adjustability), 100 µA max cathode current, SOT-23 package | Limited to fixed-voltage use; unsuitable for programmable outputs or >100 mA sink | Select only for space-constrained, fixed-reference designs where adjustment is unnecessary |
Compared with TL430ILP, TL431ACLP offers higher reference accuracy and lower drift but demands tighter external resistor matching; LM4040CIM3-2.5 trades adjustability and current capacity for compactness and fixed-voltage simplicity - neither is pin-compatible, but both serve overlapping voltage-reference roles in different design constraints.
Availability
TL430ILP is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection systems, and linear regulator output control requiring stable component supply, long-term obsolescence management, and consistent TO-92 through-hole sourcing.
Supply support for TL430ILP 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, embedded processing, and logic products for industrial, automotive, and consumer applications.
The TL430 product line was designed as a precision, cost-effective replacement for Zener diodes in feedback, protection, and voltage-setting circuits - emphasizing wide current range, low noise, and robust thermal performance in legacy through-hole packages.
FAQ
What is the reference voltage tolerance of TL430ILP at 25°C?
The TL430ILP has a reference input voltage (VI(ref)) of 2.5 V (min), 2.75 V (typ), and 3.0 V (max) at TA = 25°C and IZ = 10 mA. This ±10% initial tolerance reflects the C-grade version; tighter tolerances require TL431 variants. The TL430ILP's specification is optimized for cost-sensitive, general-purpose shunt regulation rather than metrology-grade precision.
Can TL430ILP replace a Zener diode directly in existing designs?
Yes - TL430ILP can directly replace Zener diodes in shunt regulator configurations, provided the anode is grounded, cathode connects to the rail being regulated, and the reference pin is tied to a resistor divider. Its 2.5 V reference and adjustable output (3–30 V) offer superior temperature stability and lower dynamic impedance than typical Zeners. The TL430ILP's TO-92 (LP) footprint matches common Zener packages, enabling drop-in mechanical replacement.
What is the minimum cathode current required for regulation in TL430ILP?
The TL430ILP requires a minimum cathode current (IZK) of 0.5 mA to maintain regulation near the lower knee of its operating range. Below this, output voltage deviates significantly from the programmed value. For stable operation across temperature and load, TI recommends maintaining ≥2 mA cathode current - specified as the lower limit in recommended operating conditions. This ensures reliable startup and regulation for the TL430ILP in all valid configurations.
Does TL430ILP support operation above 70°C ambient?
No - TL430ILP is characterized for operation from 0°C to 70°C only. It is the commercial-grade variant (denoted by "C" suffix); extended temperature versions (e.g., TL430AILP) are rated for –40°C to 85°C. Exceeding 70°C ambient risks parametric shift beyond datasheet limits, including increased reference drift and reduced reliability. For industrial environments, TL430AILP or TL431 variants with wider temp ranges should be selected instead of TL430ILP.
How does TL430ILP achieve low output noise compared to standard Zener diodes?
TL430ILP achieves 200 µV RMS (0.1–10 Hz) noise through an integrated bandgap reference core and low-noise amplifier architecture - unlike Zener diodes that rely on avalanche or tunneling mechanisms generating inherent wideband noise. Its internal compensation and optimized die layout minimize flicker and thermal noise contributions. This makes the TL430ILP especially effective in low-noise feedback paths where Zener noise would degrade PSRR and transient response - a key advantage confirmed in TL430ILP application notes for precision power supplies.
TL430ILP 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
TL430ILP FAQ
1.How can I place an order for TL430ILP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL430ILP 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 TL430ILP reliable?
The price and inventory of TL430ILP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL430ILP is usually 5 days.
3.What payment methods are accepted for TL430ILP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL430ILP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL430ILP?
TL430ILP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL430ILP 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 TL430ILP?
For technical support, including TL430ILP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL430ILP requirements.
6.How does Aetrix verify that TL430ILP is sourced from the original manufacturer or authorized distributors?
All TL430ILP 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 TL430ILP meets industry standards.
7.What is the process for return or replacement of TL430ILP?
All TL430ILP units undergo pre-shipment inspection (PSI). If there is an issue with TL430ILP, 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 TL430ILP part is unused and in its original packaging.
Return procedure for TL430ILP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL430ILP Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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