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STMicroelectronics LF80ABDT-TR
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- Part No.:
- LF80ABDT-TR
- Manufacturer:
- STMicroelectronics
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
LF80ABDT-TR.pdf
- Description:
- IC REG LINEAR 8V 500MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:8,643
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Product details
Overview
LF80ABDT-TR from STMicroelectronics is a very low-dropout linear voltage regulator with logic-controlled electronic shutdown, delivering 8.0 V output at up to 500 mA. It features 0.45 V dropout at 200 mA, ±1% output voltage accuracy at 25 °C, and operates across -40 to 125 °C for automotive applications. Its 50 µA quiescent current in OFF mode and 2.2 µF minimum output capacitance support battery-powered infotainment subsystems.
For engineers reviewing the LF80ABDT-TR datasheet, LF80ABDT-TR pinout, LF80ABDT-TR application, or LF80ABDT-TR equivalent, key selection criteria include dropout voltage under load, shutdown logic compatibility (TTL), AEC-Q100 qualification status, thermal resistance in DPAK package, and stability with low-ESR ceramic capacitors.
Technical Context
The LF80ABDT-TR implements a PNP pass transistor architecture enabling ultra-low dropout performance and inherent short-circuit/thermal protection. Its inhibit function accepts TTL-compatible control signals on Pin 2, allowing precise system-level power sequencing in multi-rail automotive ECUs.
It maintains regulation with input voltages as low as 8.45 V at 200 mA load (VOUT + VDROP) and achieves 80 dB supply voltage rejection at 120 Hz-critical for noise-sensitive analog sensor interfaces powered from noisy engine-bay rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.0 V ±1% at 25 °C - ensures stable MCU core or CAN transceiver supply within tight tolerance bands |
| Dropout Voltage | 0.45 V at 200 mA - enables operation from degraded 9 V battery during cold-crank conditions |
| Quiescent Current | 50 µA in OFF mode - minimizes standby drain in always-on vehicle modules |
| Max Output Current | 500 mA - supports multiple downstream ICs including microcontrollers and interface ICs |
| Operating Temp | -40 to 125 °C junction - qualified per AEC-Q100 Grade 1 for under-hood deployment |
| Stability Cap | 2.2 µF ceramic - reduces PCB area vs. traditional 10–22 µF tantalum solutions |
| SVR @ 120 Hz | 80 dB typical - suppresses alternator ripple before sensitive analog circuitry |
Pinout & Package
LF80ABDT-TR is housed in a surface-mount DPAK (TO-252-3) package with exposed thermal pad electrically connected to GND, enabling efficient heat dissipation in compact automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 8.45–40 V DC; internal clamp limits damage during load dump transients |
| 2 (INH) | Inhibit control input | TTL-compatible shutdown pin; <0.8 V = OFF, >2.0 V = ON; draws ≤10 µA |
| 3 (GND) | Ground reference | Common return for IN, INH, and OUT; tied to exposed thermal tab for thermal conduction |
| 4 (OUT) | Regulated output | Delivers 8.0 V ±1% to load; requires ≥2.2 µF ceramic capacitor with ESR 0.1–10 Ω |
Key Features
| Feature | Design Value |
|---|---|
| Logic-controlled shutdown | Enables zero-power standby of sub-systems via microcontroller GPIO without external FET |
| AEC-Q100 qualified | Validated for automotive use with PAT/SYL/SBL statistical testing and -40 to 125 °C operation |
| Low-noise regulation | 50 µV RMS output noise (10 Hz–100 kHz) preserves signal integrity in ADC reference paths |
| Internal protection | Thermal foldback and current limiting prevent latch-up during overload or short-circuit events |
| High PSRR | 80 dB rejection at 120 Hz mitigates alternator-induced ripple in body control modules |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Local 8 V rail generation for display controller and audio codec in head unit. IC Role / Device Role / Timing Role: Primary LDO providing clean, sequenced power to mixed-signal SoC peripherals. Use Value: 50 µA OFF-mode current extends battery life during vehicle sleep; 0.45 V dropout sustains operation during 9 V cold-crank dips. | Use Scenario: Powering image sensor and ISP in rear-view camera module mounted near exhaust. IC Role / Device Role / Timing Role: High-reliability local regulator meeting AEC-Q100 Grade 1 thermal requirements. Use Value: -40 to 125 °C operation and 80 dB PSRR ensure stable imaging under extreme under-bumper temperature swings and EMI. |
| Body Control Unit (BCU) | Telematics Control Unit (TCU) |
Use Scenario: Supplying 8 V to LIN transceivers and door-lock actuators in central gateway. IC Role / Device Role / Timing Role: Shutdown-capable regulator enabling selective subsystem power gating. Use Value: TTL-compatible INH pin allows microcontroller to disable non-critical loads during low-battery conditions. | Use Scenario: Providing regulated 8 V to cellular modem and GNSS receiver in connected vehicle platform. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO isolating RF section from noisy main power rail. Use Value: 50 µV output noise prevents degradation of GNSS sensitivity; 2.2 µF stability cap saves board space in dense TCU layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LDL112M80R | Lower IQ (3 µA OFF), but only 200 mA output; no inhibit pin; SOT-23-5 package | Suitable for ultra-low-power always-on nodes, not high-current or shutdown-controlled systems | Select when standby current dominates design priority and load current ≤200 mA |
| TLV73380PDBVR | Higher dropout (0.22 V @ 300 mA), 300 mA max, no AEC-Q100 rating, SOT-23-5 | Targeted at consumer portables-not qualified for automotive temperature or reliability stress | Choose only for cost-sensitive non-automotive designs requiring minimal footprint |
Compared with LDL112M80R and TLV73380PDBVR, LF80ABDT-TR uniquely combines AEC-Q100 qualification, 500 mA drive, TTL inhibit, and 0.45 V dropout-making it the sole option for automotive 8 V subsystems demanding robustness, controllability, and thermal resilience.
Availability
LF80ABDT-TR is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, body control units, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LF80ABDT-TR 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 microcontrollers, power management ICs, sensors, and automotive-grade components.
LFXX regulators belong to ST's automotive-qualified linear regulator product line, engineered specifically for robust, low-noise local power delivery in harsh-temperature vehicle subsystems where reliability and functional safety are critical.
FAQ
What is the minimum input voltage required for regulation at full 500 mA load?
At 500 mA output, the LF80ABDT-TR requires a minimum input voltage of 8.45 V (8.0 V + 0.45 V dropout). This ensures regulation during cold-crank battery dips down to 9 V, with margin for trace resistance and transient droop.
Is the INH pin compatible with 3.3 V microcontroller GPIO without level shifting?
Yes-the INH pin accepts TTL logic levels: VIH ≥ 2.0 V and VIL ≤ 0.8 V over -40 to 125 °C. A 3.3 V MCU GPIO directly drives INH high (ON) or low (OFF) with no external components required.
Does LF80ABDT-TR require an input bypass capacitor?
Yes-a 0.1 µF ceramic capacitor placed close to the IN pin is specified in the datasheet for high-frequency stability and transient response. Omitting it may cause oscillation or poor load-step recovery.
How does the thermal performance compare between DPAK and TO-220 packages?
In DPAK (LF80ABDT-TR), RthJA is 100 °C/W versus 50 °C/W for TO-220. The DPAK relies on PCB copper area for heatsinking; achieving comparable junction temperature requires ≥250 mm² of 2-oz copper connected to the exposed tab.
LF80ABDT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 1.5 mA
- Current - Supply (Max):
- 12 mA
- PSRR:
- 72dB ~ 57dB (120Hz ~ 10kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
LF80ABDT-TR FAQ
1.How can I place an order for LF80ABDT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LF80ABDT-TR 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 LF80ABDT-TR reliable?
The price and inventory of LF80ABDT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF80ABDT-TR is usually 5 days.
3.What payment methods are accepted for LF80ABDT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF80ABDT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF80ABDT-TR?
LF80ABDT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF80ABDT-TR 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 LF80ABDT-TR?
For technical support, including LF80ABDT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF80ABDT-TR requirements.
6.How does Aetrix verify that LF80ABDT-TR is sourced from the original manufacturer or authorized distributors?
All LF80ABDT-TR 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 LF80ABDT-TR meets industry standards.
7.What is the process for return or replacement of LF80ABDT-TR?
All LF80ABDT-TR units undergo pre-shipment inspection (PSI). If there is an issue with LF80ABDT-TR, 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 LF80ABDT-TR part is unused and in its original packaging.
Return procedure for LF80ABDT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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