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STMicroelectronics LE50ABD-TR
- Part No.:
- LE50ABD-TR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LE50ABD-TR.pdf
- Description:
- IC REG LINEAR 5V 100MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:16,168
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Product details
Overview
LE50ABD-TR from STMicroelectronics is a very low-dropout (LDO) linear voltage regulator with inhibit function, delivering 5 V ±1% output at up to 100 mA load current in SO-8 package. It features 0.2 V typical dropout voltage, 50 µA typical quiescent current in OFF mode, and operates across –40 °C to 125 °C junction temperature. It serves as a local power supply for microcontroller peripherals in automotive body control modules.
For engineers reviewing the LE50ABD-TR datasheet, LE50ABD-TR pinout, LE50ABD-TR application, or LE50ABD-TR equivalent, key selection criteria include dropout performance under 100 mA load, TTL-compatible shutdown logic, ±1% output accuracy at 25 °C, and thermal robustness in constrained PCB layouts.
Technical Context
The LE50ABD-TR implements a PNP-based LDO architecture with internal current and thermal limiting, enabling stable regulation even with minimal 2.2 µF output capacitance (ESR 0.1–10 Ω). Its inhibit pin (Pin 5) accepts TTL-level logic control, allowing precise system-level power sequencing and standby mode activation.
Designed for high-reliability embedded systems, it maintains 76 dB supply voltage rejection at 120 Hz and delivers 50 µV RMS output noise over 10 Hz–100 kHz bandwidth. The SO-8 package integrates pins 2, 3, 6, and 7 to the die attach pad, reducing thermal resistance to 20 °C/W (junction-to-case) when mounted on adequate copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 5.0 V ±1% at 25 °C - ensures tight rail tolerance for 5 V logic interfaces and analog sensors |
| Dropout voltage | 0.2 V typ. @ 100 mA - enables operation down to 5.2 V input, critical for battery-powered systems near EOL |
| Quiescent current | 50 µA typ. in OFF mode - minimizes standby leakage in always-on subsystems |
| Supply voltage rejection | 76 dB @ 120 Hz - suppresses ripple from upstream switching regulators feeding the LDO |
| Operating temperature | –40 °C to +125 °C - supports under-hood automotive and industrial control environments |
| Output capacitance | 2.2 µF ceramic (ESR 0.1–10 Ω) - eliminates need for bulk electrolytic, saving board space and cost |
| Shutdown logic | TTL-compatible INHIBIT (Pin 5) - allows direct interfacing with MCU GPIO without level-shifting |
Pinout & Package
LE50ABD-TR is supplied in an SO-8 surface-mount package (ECOPACK® compliant), with pins 2, 3, 6, and 7 internally fused to the exposed die attach pad for enhanced thermal dissipation. The package footprint matches standard SO-8 dimensions (4.9 mm × 6.0 mm), and requires no heatsink for ≤100 mA loads with ≥1 cm² of 2-oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 6–18 V DC; must be decoupled with ≥0.1 µF ceramic close to pin |
| 2 (GND) | Ground reference | Connected internally to die attach pad; primary return path for load and bias currents |
| 3 (OUT) | Regulated output | Delivers 5 V ±1%; requires 2.2 µF ceramic capacitor with ESR 0.1–10 Ω |
| 4 (GND) | Ground reference | Second ground terminal; improves noise immunity and current sharing with Pin 2 |
| 5 (INH) | Inhibit control input | TTL-compatible shutdown: <0.8 V = OFF (50 µA IQ), >2 V = ON (0.5 mA IQ) |
| 6 (GND) | Ground reference | Internally fused to die attach pad; enhances thermal conduction to PCB copper |
| 7 (GND) | Ground reference | Internally fused to die attach pad; reduces thermal resistance to 20 °C/W (junction-to-case) |
| 8 (NC) | No connect | Not bonded; left unconnected per design - no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| Very low dropout | 0.2 V typical @ 100 mA enables use with weak or aging input sources (e.g., 3S Li-ion at 11.1 V nominal → 9.5 V min) |
| TTL-compatible inhibit | Direct GPIO control without external level shifters - simplifies MCU interface and reduces BOM count |
| ±1% output accuracy | Guaranteed at 25 °C and full load range - eliminates need for post-regulation trimming in precision analog circuits |
| Low-noise regulation | 50 µV RMS output noise (10 Hz–100 kHz) - suitable for powering ADC references and RF front-end bias rails |
| Robust thermal design | SO-8 package with fused GND pins achieves 20 °C/W RthJC - supports continuous 100 mA operation with minimal copper area |
Applications
| Automotive Body Control Module | Industrial PLC I/O Subsystem |
|---|---|
|
Use Scenario: Powering CAN transceiver, EEPROM, and wake-up comparator in door module. IC Role / Device Role / Timing Role: Local 5 V LDO with controlled enable/disable for sleep/wake transitions. Use Value: 50 µA OFF-mode current extends battery life during vehicle sleep; 0.2 V dropout preserves regulation during cold-crank (6.5 V battery). |
Use Scenario: Supplying isolated digital input conditioning circuitry in modular I/O base unit. IC Role / Device Role / Timing Role: Dedicated 5 V rail generator with shutdown capability for field-side isolation barriers. Use Value: ±1% output accuracy ensures reliable logic-level detection across temperature; 76 dB SVR rejects noise from adjacent 24 V DC-DC converters. |
| Medical Patient Monitor Sensor Hub | Smart Energy Meter MCU Core Rail |
|
Use Scenario: Biasing low-power analog front-end (AFE) for ECG/SpO₂ sensor signal chain. IC Role / Device Role / Timing Role: Ultra-low-noise 5 V supply for precision op-amps and ADC reference buffers. Use Value: 50 µV RMS noise prevents degradation of 16-bit ADC ENOB; 2.2 µF stability capacitor avoids large tantalum parts in space-constrained housing. |
Use Scenario: Providing regulated 5 V to metrology SoC and real-time clock during mains failure (backup battery mode). IC Role / Device Role / Timing Role: Low-quiescent LDO enabling extended battery backup runtime without compromising accuracy. Use Value: 0.2 V dropout allows operation down to 5.2 V input - maximizes usable capacity of 3.6 V Li-SOCl₂ battery with boost converter output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LDL1117S50R | Fixed 5 V output, no inhibit pin, SOT-223 package, 1.2 V dropout @ 800 mA | Lacks shutdown control; higher dropout limits use in low-input-voltage battery systems | Select when board space permits larger SOT-223 and inhibit function is unnecessary |
| TLV70550YFPR | 5 V fixed, 150 mA rated, 0.22 V dropout @ 100 mA, 25 µA IQ in ON mode, X2SON-4 package | Smaller footprint but no dedicated inhibit pin - requires external logic for shutdown | Prefer for ultra-compact designs where GPIO-controlled shutdown can be implemented externally |
Compared with LDL1117S50R and TLV70550YFPR, LE50ABD-TR uniquely combines TTL-compatible inhibit, SO-8 thermal performance, and ±1% accuracy in a production-proven automotive-grade LDO - making it optimal for systems requiring coordinated power sequencing and high-temperature reliability.
Availability
LE50ABD-TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, medical sensor hubs, and smart energy metering systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LE50ABD-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 analog components for automotive, industrial, and consumer markets.
LE50ABD-TR belongs to the LEXX family of very low-dropout regulators engineered specifically for battery-powered and thermally constrained embedded systems where precision, low IQ, and robust shutdown control are mandatory.
FAQ
What is the recommended input bypass capacitor for LE50ABD-TR?
A minimum 0.1 µF X7R ceramic capacitor placed within 2 mm of Pin 1 (IN) and Pin 2 (GND) is required to suppress high-frequency noise and ensure stability. This capacitor must have low ESL and be rated for ≥25 V DC to handle transient spikes up to 20 V absolute maximum input.
Can LE50ABD-TR be used without connecting the INHIBIT pin?
Yes, but not recommended: leaving Pin 5 floating places the device in permanent ON mode, eliminating shutdown capability. If inhibit is unused, ST specifies grounding Pin 5 to prevent noise-induced false triggering and ensure predictable quiescent current behavior.
Does LE50ABD-TR require a minimum load current to maintain regulation?
No - the regulator maintains specified output voltage accuracy and stability with zero load current. Quiescent current remains at 0.5 mA in ON mode regardless of load, and output voltage deviation stays within ±1% across 0–100 mA due to internal error amplifier design.
How does the SO-8 thermal design differ from standard SO-8 packages?
LE50ABD-TR's SO-8 uses an internal frame that electrically fuses Pins 2, 3, 6, and 7 to the die attach pad, reducing junction-to-case thermal resistance to 20 °C/W. This allows 100 mA continuous operation with only 1 cm² of 2-oz copper, unlike standard SO-8 regulators requiring external heatsinks above 50 mA.
LE50ABD-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 1 mA
- Current - Supply (Max):
- 3 mA
- PSRR:
- 76dB ~ 60dB (120Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LE50ABD-TR FAQ
1.How can I place an order for LE50ABD-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LE50ABD-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 LE50ABD-TR reliable?
The price and inventory of LE50ABD-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LE50ABD-TR is usually 5 days.
3.What payment methods are accepted for LE50ABD-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LE50ABD-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LE50ABD-TR?
LE50ABD-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LE50ABD-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 LE50ABD-TR?
For technical support, including LE50ABD-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LE50ABD-TR requirements.
6.How does Aetrix verify that LE50ABD-TR is sourced from the original manufacturer or authorized distributors?
All LE50ABD-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 LE50ABD-TR meets industry standards.
7.What is the process for return or replacement of LE50ABD-TR?
All LE50ABD-TR units undergo pre-shipment inspection (PSI). If there is an issue with LE50ABD-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 LE50ABD-TR part is unused and in its original packaging.
Return procedure for LE50ABD-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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