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STMicroelectronics LE80ABZ
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- Part No.:
- LE80ABZ
- Manufacturer:
- STMicroelectronics
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LE80ABZ.pdf
- Description:
- IC REG LINEAR 8V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,214
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Product details
Overview
LE80ABZ from STMicroelectronics is a very low dropout (LDO) linear voltage regulator delivering 8.0 V ±1% output at up to 100 mA, featuring 0.2 V typical dropout at full load, 50 µA quiescent current in OFF mode, and TTL-compatible inhibit control (pin 5) in SO-8 package for battery-powered systems requiring precise local regulation with standby capability.
For engineers reviewing the LE80ABZ datasheet, LE80ABZ pinout, LE80ABZ application, or LE80ABZ equivalent, this device supports low-noise, low-power embedded power rails where thermal efficiency, supply rejection (80 dB typ.), and minimal external capacitance (2.2 µF) are critical selection criteria.
Technical Context
The LE80ABZ integrates an internal current and thermal limit, operates across –40 °C to +125 °C junction temperature, and maintains stable regulation with only 2.2 µF output capacitance (ESR 0.1–10 Ω). Its inhibit function enables system-level power sequencing via TTL-level logic control.
It is pin-to-pin compatible with legacy L78Lxx regulators but adds active shutdown capability in SO-8 configuration-unlike TO-92 variants, which remain permanently enabled. Input voltage range extends to 18 V DC with internally limited power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.0 V ±1% at 25 °C; ensures precision rail for analog sensors or MCU I/O domains without external trimming. |
| Dropout Voltage | 0.2 V typ. @ 100 mA; enables operation from 8.2 V input, maximizing battery runtime in single-cell Li-ion or multi-cell alkaline systems. |
| Quiescent Current | 50 µA in OFF mode; reduces standby power loss by >90% vs. standard LDOs, critical for always-on IoT nodes. |
| Supply Rejection | 80 dB typ. @ 120 Hz; suppresses ripple from noisy switchers or shared DC bus, preserving ADC reference stability. |
| Output Capacitance | 2.2 µF ceramic (ESR 0.1–10 Ω); eliminates need for bulky electrolytics, saving PCB area and cost in space-constrained designs. |
| Operating Temp | –40 °C to +125 °C junction; qualified for under-hood automotive modules and industrial motor controllers. |
| Inhibit Logic | TTL-compatible (VIL ≤ 0.8 V, VIH ≥ 2.0 V); allows direct interfacing with microcontroller GPIO without level-shifting. |
Pinout & Package
LE80ABZ is packaged in SO-8 with exposed die attach flag (pins 2, 3, 6, 7 internally connected to thermal pad), enabling enhanced heatsinking when mounted on ≥1 cm² copper pour. Pin 5 is Inhibit (active-low enable); floating defaults to ON.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 8.0 V output; requires 2.2 µF ceramic capacitor to ground for stability. |
| 2 & 3 & 6 & 7 | Thermal Flag / GND | Internally tied to die attach flag; must be soldered to large PCB copper area for thermal performance (RthJA = 55 °C/W). |
| 4 | GND | Analog ground reference; separate low-impedance return path improves PSRR and noise immunity. |
| 5 | Inhibit (INH) | Active-low TTL control: <0.8 V disables regulator (50 µA IQ), ≥2.0 V enables (0.5 mA IQ). |
| 8 | VIN | Input supply (up to 18 V); bypass with 0.1 µF ceramic near pin for high-frequency noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 0.2 V typical @ 100 mA enables use with marginal input margins (e.g., 8.2 V → 8.0 V rail). |
| Low-quiescent-current shutdown | 50 µA OFF-mode current extends battery life in sleep-state applications like remote sensors. |
| Stable with small ceramic cap | 2.2 µF output capacitance eliminates ESR requirements and simplifies BOM vs. older LDOs needing 10–22 µF. |
| Wide input voltage range | 2.5–18 V operation supports diverse sources: USB, boost converters, or unregulated wall adapters. |
| Integrated protection | Current limiting and thermal shutdown prevent damage during overload or poor heatsinking conditions. |
Applications
| Automotive Body Control Module | Industrial Sensor Node |
|---|---|
|
Use Scenario: Powering CAN transceiver and microcontroller I/O in door module with 12 V battery supply subject to load dump transients. IC Role / Device Role / Timing Role: Local 8.0 V LDO providing clean, regulated rail independent of main 5 V domain; inhibit pin synchronized with MCU sleep mode. Use Value: 0.2 V dropout preserves regulation during cold-crank (6.5 V battery), while 80 dB SVR rejects alternator ripple. |
Use Scenario: Battery-powered vibration sensor node transmitting data over LoRaWAN with 10-year target lifetime. IC Role / Device Role / Timing Role: Primary power regulator for ultra-low-power MCU and MEMS accelerometer; inhibited between measurements. Use Value: 50 µA OFF-mode current reduces average system sleep current to <1 µA, directly extending battery life. |
| Medical Wearable Monitor | Point-of-Sale Terminal |
|
Use Scenario: Compact ECG front-end requiring low-noise 8.0 V bias for op-amp signal conditioning. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling analog section from digital power domain. Use Value: 50 µV RMS output noise (10 Hz–100 kHz) prevents interference in sub-mV biopotential measurements. |
Use Scenario: Embedded thermal printer subsystem powered from shared 12 V rail with variable load profiles. IC Role / Device Role / Timing Role: Dedicated 8.0 V supply for print head driver IC, sequenced ON/OFF with print cycles. Use Value: TTL inhibit allows precise timing control of print head power, reducing thermal stress and improving print consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LE80C | ±2% output tolerance (vs. ±1% for LE80ABZ); identical dropout, quiescent current, and pinout. | Suitable for non-critical digital rails where tighter regulation is unnecessary. | Select LE80C for cost-sensitive designs where 8.0 V ±0.16 V meets system margin. |
| LDL1117S80R | Fixed 8.0 V SOT-223 LDO; 1.2 V dropout (vs. 0.2 V), 1.5 mA quiescent current (ON), no inhibit pin. | Lacks shutdown control and has higher dropout-unsuitable for low-input-margin or ultra-low-power use cases. | Choose only if board space permits larger package and system does not require standby current reduction. |
Compared with LE80C, LE80ABZ provides tighter initial accuracy for analog-sensing applications; compared with LDL1117S80R, it delivers superior dropout and shutdown capability essential for battery longevity and dynamic power management.
Availability
LE80ABZ is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, medical wearables, and point-of-sale terminals requiring stable component supply with long lifecycle support.
Supply support for LE80ABZ 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The LExxAB series targets ultra-low-power, high-accuracy local regulation in space- and energy-constrained systems-emphasizing dropout minimization, thermal robustness, and seamless integration with digital control logic.
FAQ
What is the minimum input voltage required for stable 8.0 V output at 100 mA?
The LE80ABZ requires a minimum input voltage of 8.2 V to maintain regulation at 100 mA load, based on its 0.2 V typical dropout voltage. At elevated temperatures or worst-case tolerance, design margin should include up to 0.5 V dropout, recommending ≥8.5 V nominal input for robust operation.
Can the inhibit pin be left unconnected, and what happens if it is?
Yes, the inhibit pin may be left floating, resulting in default ON operation per datasheet note. However, STMicroelectronics recommends grounding the pin when unused to prevent noise-induced toggling; floating pins risk unintended shutdown due to EMI coupling in high-noise environments.
Is an input bypass capacitor required, and what value is recommended?
A 0.1 µF ceramic capacitor is required between VIN and GND, placed as close as possible to pins 8 and 4. This suppresses high-frequency noise and stabilizes the regulator under transient load conditions; omitting it may cause oscillation or degraded PSRR above 100 kHz.
How does thermal performance differ between SO-8 and TO-92 packages for this part?
The SO-8 package (used for LE80ABZ) features an internal thermal flag (RthJA = 55 °C/W with PCB copper) versus TO-92's 200 °C/W. This 3.6× better thermal resistance allows ≥2× higher continuous output current in thermally constrained layouts when the flag is properly heatsunk.
LE80ABZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 1.6 mA
- Current - Supply (Max):
- 3.6 mA
- PSRR:
- 72dB ~ 57dB (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
LE80ABZ FAQ
1.How can I place an order for LE80ABZ through Aetrix?
Please submit a Request for Quotation (RFQ) for LE80ABZ 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 LE80ABZ reliable?
The price and inventory of LE80ABZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LE80ABZ is usually 5 days.
3.What payment methods are accepted for LE80ABZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LE80ABZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LE80ABZ?
LE80ABZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LE80ABZ 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 LE80ABZ?
For technical support, including LE80ABZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LE80ABZ requirements.
6.How does Aetrix verify that LE80ABZ is sourced from the original manufacturer or authorized distributors?
All LE80ABZ 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 LE80ABZ meets industry standards.
7.What is the process for return or replacement of LE80ABZ?
All LE80ABZ units undergo pre-shipment inspection (PSI). If there is an issue with LE80ABZ, 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 LE80ABZ part is unused and in its original packaging.
Return procedure for LE80ABZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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