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STMicroelectronics LE50ABZ-TR
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- Part No.:
- LE50ABZ-TR
- Manufacturer:
- STMicroelectronics
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LE50ABZ-TR.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,832
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Product details
Overview
LE50ABZ-TR from STMicroelectronics is a 5.0 V fixed-output, very low dropout (LDO) linear voltage regulator in SO-8 package with TTL-compatible inhibit control (pin 5), delivering up to 100 mA output current, 0.2 V typical dropout at 100 mA, ±1% output voltage accuracy at 25 °C, and operating across –40 to 125 °C for automotive and industrial power rail regulation.
For engineers reviewing the LE50ABZ-TR datasheet, LE50ABZ-TR pinout, LE50ABZ-TR application, or LE50ABZ-TR equivalent, this device is selected for battery-powered systems requiring ultra-low quiescent current (50 µA in OFF mode), stable local regulation with minimal external capacitance (2.2 µF), and logic-controlled power gating in space-constrained PCB layouts.
Technical Context
The LE50ABZ-TR integrates a precision bandgap reference, error amplifier, pass transistor, and TTL-level inhibit input circuitry - enabling fast enable/disable transitions and stable operation under dynamic load conditions. Its internal current and thermal limiting protect against fault conditions without external components.
Designed for low-noise, low-power applications, it achieves 80 dB supply voltage rejection at 120 Hz and maintains regulation down to 0.5 V dropout over full temperature range. The SO-8 package features internally connected pins 2, 3, 6, and 7 to the die attach flag for enhanced thermal dissipation (RthJA = 55 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±1% at 25 °C - ensures precise rail generation for 5 V logic, sensors, and analog circuitry without trimming. |
| Dropout Voltage | 0.2 V typ. @ 100 mA - enables regulation from 5.2 V input, critical for single-cell Li-ion or multi-cell alkaline systems. |
| Quiescent Current | 0.5 mA typ. ON mode / 50 µA typ. OFF mode - minimizes standby power loss in always-on subsystems and wake-on-event designs. |
| Output Current | 100 mA continuous - sufficient for microcontrollers, RF modules, and small peripherals without external boost stages. |
| Stability Capacitor | 2.2 µF ceramic (ESR 0.1–10 Ω) - eliminates need for large tantalum or electrolytic capacitors, reducing board area and cost. |
| Supply Rejection | 80 dB @ 120 Hz - suppresses ripple from switching pre-regulators or noisy DC sources feeding the LDO input. |
| Operating Temp | –40 to 125 °C junction - qualified for under-hood automotive, industrial motor controls, and harsh-environment IoT nodes. |
Pinout & Package
LE50ABZ-TR is housed in an SO-8 package with internally connected pins 2, 3, 6, and 7 tied to the die attach flag for improved thermal performance. Pin 5 is the TTL-compatible inhibit input; floating or high disables regulation (OFF mode), while grounded enables output (ON mode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 5.0 V output - connects directly to load; requires 2.2 µF ceramic capacitor to ground for stability. |
| 2 & 3 & 6 & 7 | GND / Thermal Flag | Common ground and thermal path - must be soldered to ≥100 mm² copper pour for RthJA ≤ 55 °C/W. |
| 4 | VIN | Input supply (up to 18 V) - decoupled with 0.1 µF ceramic close to pin for high-frequency noise suppression. |
| 5 | INH (Inhibit) | TTL-compatible logic input - <0.8 V = ON, >2.0 V = OFF; internal pull-down ensures default ON if unconnected. |
| 8 | NC | No connect - left floating; not bonded internally and has no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Very low dropout | 0.2 V typical at 100 mA enables operation with minimal headroom - extends battery runtime in portable devices. |
| Inhibit control | TTL-compatible pin 5 allows system-level power sequencing and selective subsystem shutdown without external MOSFETs. |
| High accuracy | ±1% output tolerance at 25 °C reduces need for post-regulation calibration in precision analog signal chains. |
| Low-noise output | 50 µV RMS noise (10 Hz–100 kHz) supports noise-sensitive loads like ADC references and RF synthesizers. |
| Robust protection | Internal current and thermal limiting prevent damage during short-circuit or overload - no external foldback required. |
Applications
| Automotive Body Control Module | Industrial Sensor Node |
|---|---|
|
Use Scenario: Powering CAN transceiver, door lock MCU, and LIN interface in vehicle body electronics. IC Role / Device Role / Timing Role: Local 5 V LDO providing clean, sequenced supply with inhibit-driven sleep/wake control. Use Value: Enables <50 µA system standby current and meets AEC-Q100 Grade 1 temperature requirements (–40 to 125 °C). |
Use Scenario: Regulating power for MEMS pressure sensor, low-power MCU, and sub-GHz wireless transceiver in factory-floor node. IC Role / Device Role / Timing Role: Primary 5 V rail generator with fast enable/disable for duty-cycled sensing and transmission. Use Value: Delivers stable 5 V from 6–12 V industrial bus using only 2.2 µF output cap - saves board space and BOM cost. |
| Portable Medical Monitor | Smart Energy Meter |
|
Use Scenario: Supplying ECG front-end analog circuitry and display controller in handheld patient monitor. IC Role / Device Role / Timing Role: Low-noise, low-dropout regulator ensuring <50 µV ripple on analog rails for accurate signal acquisition. Use Value: 80 dB SVR and 50 µV noise meet IEC 60601-1 EMC and signal integrity requirements for Class II medical devices. |
Use Scenario: Providing isolated 5 V supply for metrology ASIC, RTC, and PLC communication interface in utility meter. IC Role / Device Role / Timing Role: Secondary LDO fed from isolated DC/DC converter, with inhibit used for firmware-triggered deep-sleep mode. Use Value: 0.2 V dropout allows operation down to 5.2 V input - accommodates aging of backup supercapacitor during mains failure. |
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 5.0 V, SOT-223, 800 mA output, 1.2 V dropout - higher current but larger dropout and package. | Suitable for higher-load applications where thermal margin is available; lacks inhibit control. | Select when >100 mA output or TO-220/SOT-223 mounting is preferred; avoid if logic-controlled shutdown is required. |
| TPS73550DRVR | 5.0 V, WSON-6, 500 mA, 0.22 V dropout, 30 µA quiescent - lower IQ but no inhibit pin and different footprint. | Better for ultra-low-power always-on systems without sequencing needs; incompatible pinout and thermal design. | Choose for battery life optimization in non-sequenced rails; verify PCB layout compatibility and thermal derating. |
Compared with LDL1117S50R and TPS73550DRVR, LE50ABZ-TR uniquely balances 100 mA capability, 0.2 V dropout, integrated inhibit, SO-8 thermal flag, and ±1% accuracy - making it optimal for space-constrained, sequenced, automotive-grade 5 V regulation where pin compatibility with legacy L78Lxx is beneficial.
Availability
LE50ABZ-TR is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, portable medical monitors, and smart energy meters requiring stable component supply with long-term lifecycle assurance.
Supply support for LE50ABZ-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, specializing in automotive, industrial, and power management ICs with broad manufacturing and qualification capabilities.
LE50ABZ-TR belongs to the LExxAB series of ultra-low-dropout regulators designed specifically for low-power, high-reliability applications in automotive and industrial environments where precision, thermal robustness, and logic-controlled enablement are essential.
FAQ
What is the minimum input voltage required for regulation at full 100 mA load?
The LE50ABZ-TR maintains regulation with a minimum input voltage of 5.2 V at 100 mA load, based on its 0.2 V typical dropout voltage. At worst-case 0.5 V dropout (over temperature), input must be ≥5.5 V. Input voltage must remain within absolute maximum rating of 20 V.
Can the INH pin be left unconnected in a design?
Yes - the INH pin has an internal pull-down, so leaving it unconnected defaults the device to ON mode. However, STMicroelectronics recommends grounding it explicitly when inhibit functionality is unused to prevent noise-induced toggling in electrically noisy environments.
Is the SO-8 package thermally enhanced compared to standard SO-8?
Yes - pins 2, 3, 6, and 7 are internally connected to the die attach flag, reducing thermal resistance to 20 °C/W junction-to-case and 55 °C/W junction-to-ambient (with adequate PCB copper). This allows 100 mA operation at up to 125 °C ambient when properly heatsinked.
Does LE50ABZ-TR require an input bypass capacitor?
Yes - a 0.1 µF ceramic capacitor placed as close as possible to the VIN (pin 4) and GND (pins 2/3/6/7) is required for high-frequency stability and noise immunity. This is specified in the test circuits and application diagrams of the official datasheet.
LE50ABZ-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LE50ABZ-TR FAQ
1.How can I place an order for LE50ABZ-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LE50ABZ-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 LE50ABZ-TR reliable?
The price and inventory of LE50ABZ-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LE50ABZ-TR is usually 5 days.
3.What payment methods are accepted for LE50ABZ-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LE50ABZ-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LE50ABZ-TR?
LE50ABZ-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LE50ABZ-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 LE50ABZ-TR?
For technical support, including LE50ABZ-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LE50ABZ-TR requirements.
6.How does Aetrix verify that LE50ABZ-TR is sourced from the original manufacturer or authorized distributors?
All LE50ABZ-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 LE50ABZ-TR meets industry standards.
7.What is the process for return or replacement of LE50ABZ-TR?
All LE50ABZ-TR units undergo pre-shipment inspection (PSI). If there is an issue with LE50ABZ-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 LE50ABZ-TR part is unused and in its original packaging.
Return procedure for LE50ABZ-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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