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STMicroelectronics TDA8133
- Part No.:
- TDA8133
- Manufacturer:
- STMicroelectronics
- Package:
- 9-SIP
- Datasheet:
-
TDA8133.pdf
- Description:
- IC REG LINEAR 5.1V/8V 9SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,824
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Product details
Overview
TDA8133 from STMicroelectronics is a monolithic dual positive voltage regulator IC providing fixed +5.1 V and +8.0 V outputs with integrated reset (on Output 1) and TTL-disable (on Output 2), supporting up to 750 mA per channel, ±2% output accuracy, and thermal/short-circuit protection. It serves as a power management solution in legacy industrial control and analog video systems requiring dual-rail biasing with supervisory functions.
For engineers reviewing the TDA8133 datasheet, TDA8133 pinout, TDA8133 application, or TDA8133 equivalent, key selection considerations include its dual-output dropout behavior (1.4 V at 750 mA), reset threshold hysteresis (20–75 mV), disable input logic levels (VIH = 2 V, VIL = 0.8 V), and SIP9/DIP16 package thermal resistance (RthJA = 50–56 °C/W).
Technical Context
The TDA8133 integrates two independent linear regulators sharing a single trimmed zener reference, with Output 1 feeding the internal reset comparator and Output 2 controlled by a TTL-compatible disable input. Its Darlington output stage delivers low dropout (1.4 V max at full load) while maintaining stability with 10 µF ceramic or electrolytic output capacitors.
Reset functionality operates via external capacitor Ce (e.g., 100 nF), generating a 25 ms delay pulse when Output 1 falls below VO1 − 0.25 V (typ. 4.85 V); the reset output exhibits 20–75 mV hysteresis to prevent chatter during brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output 1 Voltage | 5.1 V ±2% - precision rail for microcontroller I/O or analog circuitry requiring stable 5 V supply |
| Output 2 Voltage | 8.0 V ±2% - dedicated bias for CRT deflection circuits or op-amp rails needing higher voltage |
| Max Output Current | 750 mA per channel - supports moderate-power analog subsystems without external pass transistors |
| Dropout Voltage | 1.4 V at 750 mA - enables operation from 7 V input while sustaining both regulated outputs |
| Reset Threshold | VO1 − 0.25 V (typ.) - triggers clean system reset before Output 1 collapses below functional minimum |
| Disable Input Logic | VIL ≤ 0.8 V / VIH ≥ 2 V - direct TTL-level control of Output 2 without level-shifting circuitry |
| Thermal Shutdown | 145 °C junction - protects against sustained overload or poor heatsinking in confined enclosures |
Pinout & Package
Available in SIP9 (plastic single in-line, 9-pin) and DIP16 (dual in-line, 16-pin) packages. Tab connected to GROUND in SIP9 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INPUT1 | Main regulator input supply | Primary DC input (7–18 V); powers internal reference and Output 1 stage |
| INPUT2 | Secondary regulator input | Independent input (7–18 V) for Output 2; does not power reference or Output 1 |
| OUTPUT1 | +5.1 V regulated output | Supplies critical logic/analog loads; feeds reset comparator |
| OUTPUT2 | +8.0 V regulated output | Provides auxiliary rail; disabled via TTL-level signal on DISABLE pin |
| RESET | Open-collector reset output | Active-low reset pulse (25 ms delay) triggered by Output 1 undervoltage |
| DISABLE | TTL-compatible enable/disable input | Low = Output 2 off; high = Output 2 active; no pull-up required |
| DELAY CAPACITOR | Reset timing node | Connects external capacitor (e.g., 100 nF) to set reset pulse delay duration |
| NTBC | No-connection terminal | Must remain unconnected; electrically isolated from internal circuitry |
| GROUND | Common return path | All grounds tied internally; tab in SIP9 is GROUND |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulation | Simultaneous +5.1 V/750 mA and +8.0 V/750 mA from separate inputs, enabling flexible power tree design |
| Integrated reset generator | Monitors Output 1 voltage directly and asserts open-drain RESET with user-adjustable delay via external capacitor |
| TTL-compatible disable | Direct interface to microcontroller GPIO without level shifters; low-power disable state (<2 µA bias) |
| Robust protection suite | Thermal shutdown (145 °C), short-circuit limiting (1.0–1.6 A), and internal current limiting per output |
| Low-quiescent operation | 2 mA total quiescent current with Output 2 disabled - suitable for standby-aware systems |
Applications
| Industrial Control Panel Power | Analog Video Signal Chain Bias |
|---|---|
Use Scenario: Powering PLC I/O modules and front-panel displays requiring stable dual-rail supplies under variable line conditions. IC Role / Device Role / Timing Role: Dual-voltage regulator with reset supervision ensures deterministic startup and brownout recovery for embedded controllers. Use Value: Eliminates need for discrete reset IC and second LDO; ±2% output tolerance maintains ADC reference integrity and display driver timing. | Use Scenario: Supplying horizontal/vertical deflection amplifiers and sync processing circuitry in CRT-based test equipment. IC Role / Device Role / Timing Role: Provides +5.1 V for logic and +8.0 V for deflection coil drivers, with Output 2 disable enabling power-down of high-current stages. Use Value: 750 mA Output 2 capacity meets peak deflection demand; TTL disable allows microcontroller-controlled power gating to reduce idle dissipation. |
| Legacy Set-Top Box AV Processing | Embedded Instrumentation Front-End |
Use Scenario: Powering composite video DACs, audio op-amps, and IR receiver circuitry in discontinued digital TV receivers. IC Role / Device Role / Timing Role: Regulator with integrated reset ensures synchronized boot of video decoder and audio processor after AC power restoration. Use Value: Reset pulse delay (25 ms with 100 nF) matches typical power-rail stabilization time, preventing spurious resets during turn-on. | Use Scenario: Biasing precision op-amps, multiplexed sensor interfaces, and analog-to-digital conversion circuitry in portable test gear. IC Role / Device Role / Timing Role: Delivers low-noise, thermally stable dual rails while enabling selective shutdown of unused analog channels. Use Value: 100 ppm/°C thermal drift preserves gain accuracy across operating temperature range; ground-referenced tab aids thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2587T-5.0/LM2587T-8.0 | Switching regulator pair; higher efficiency but requires external inductors and generates EMI | Suitable for battery-powered or thermally constrained designs where >85% efficiency is mandatory | Select only if input voltage exceeds 18 V or thermal budget prohibits linear regulation |
| TPS7A4700RGWR + TPS7A3301RGWR | Two separate ultra-low-noise LDOs; adjustable outputs, lower dropout (0.3 V), no integrated reset/disable | Preferred for high-precision analog signal chains requiring <4 µVrms noise and independent output control | Choose when reset and disable must be implemented externally using supervisors like TLV803 or GPIO-driven FETs |
Compared with LM2587T-5.0/8.0 and TPS7A4700+TPS7A3301, the TDA8133 offers integrated dual-rail regulation with supervisory logic in a single SIP9 package-reducing BOM count and PCB area-but trades off efficiency and noise performance for simplicity and cost in legacy 7–18 V industrial systems.
Availability
TDA8133 is available at Aetrix Electronics and suitable for industrial control panel power, analog video signal chain bias, and legacy set-top box AV processing requiring stable component supply and long-term obsolescence support.
Supply support for TDA8133 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
The TDA8133 belongs to ST's legacy analog power management product line, developed specifically for cost-sensitive, medium-power industrial and video applications requiring integrated dual-rail regulation with basic supervisory functions.
FAQ
What is the function of the NTBC pin on the TDA8133?
The NTBC (Not To Be Connected) pin is an unconnected terminal with no internal electrical connection. It must remain floating and unattached in the PCB layout to avoid unintended coupling or mechanical stress. This pin exists solely for mechanical symmetry in the SIP9 package and carries no circuit function.
Can the TDA8133 operate with only INPUT1 powered?
Yes - INPUT1 powers the internal voltage reference and Output 1 regulator. Output 2 will remain inactive unless INPUT2 is also supplied, because Output 2's pass transistor is biased separately and cannot function without its dedicated input voltage. The device does not backfeed between inputs.
How is the reset delay time determined for the TDA8133?
The reset delay (tRD ≈ 25 ms) is set by the external capacitor Ce connected to the DELAY CAPACITOR pin. The internal 10 µA current source charges Ce toward 2.5 V; tRD = (2.5 V × Ce) / 10 µA. For example, a 100 nF capacitor yields ~25 ms, while 220 nF extends it to ~55 ms - enabling precise brownout recovery timing.
Is the TDA8133 still recommended for new designs?
No - STMicroelectronics has marked the TDA8133 as obsolete. While Aetrix Electronics maintains limited legacy stock and supports repair/replacement programs, new designs should consider modern alternatives such as dual-LDOs with integrated supervisors (e.g., TPS65023) or programmable PMICs offering higher efficiency, smaller footprint, and extended temperature range.
TDA8133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 9-SIP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 5.1V, 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 750mA, 1.4V @ 750mA
- Current - Output:
- 750mA, 750mA
- Current - Quiescent (Iq):
- 2 mA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 9-SIP
TDA8133 FAQ
1.How can I place an order for TDA8133 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA8133 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 TDA8133 reliable?
The price and inventory of TDA8133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA8133 is usually 5 days.
3.What payment methods are accepted for TDA8133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA8133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA8133?
TDA8133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA8133 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 TDA8133?
For technical support, including TDA8133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA8133 requirements.
6.How does Aetrix verify that TDA8133 is sourced from the original manufacturer or authorized distributors?
All TDA8133 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 TDA8133 meets industry standards.
7.What is the process for return or replacement of TDA8133?
All TDA8133 units undergo pre-shipment inspection (PSI). If there is an issue with TDA8133, 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 TDA8133 part is unused and in its original packaging.
Return procedure for TDA8133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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