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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

STMicroelectronics L78L10ACZ-TR

Name: L78L10ACZ-TR
Brand: STMicroelectronics
SKU: L78L10ACZ-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L78L10ACZ-TR

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: L78L10ACZ-TR.pdf

Description:: IC REG LINEAR 10V 100MA TO92-3

Quantity:: RFQ Add To RFQ list

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Inventory:1,412

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Product details

Overview

L78L10ACZ-TR from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 10 V output at up to 100 mA, with ±4% output voltage tolerance (A grade), 1.7 V dropout voltage, and integrated thermal overload and short-circuit protection. It requires no external components and is used for local on-card regulation in microcontroller power rails, sensor interface supplies, and low-power industrial control modules.

For engineers reviewing the L78L10ACZ-TR datasheet, L78L10ACZ-TR pinout, L78L10ACZ-TR application, or L78L10ACZ-TR equivalent, this page provides verified technical context, TO-92 package details, real-world use scenarios, and validated alternative options for fixed-voltage local regulation where low quiescent current (6 mA typ.), low noise (60 µV RMS), and supply voltage rejection (37–45 dB) are critical.

Technical Context

The L78L10ACZ-TR implements a monolithic series-pass regulator architecture with internal current limiting, thermal shutdown, and stable operation across 0–125 °C junction temperature. Its design eliminates need for external compensation or bypass capacitors beyond standard input (0.33 µF) and output (0.1 µF) ceramics.

It operates with a minimum input-to-output differential of 1.7 V and maintains regulation over input voltages from 12.5 V to 23 V at load currents up to 100 mA. Output voltage accuracy is specified as 9.6–10.4 V at 25 °C and 9.5–10.5 V across full load (1–70 mA) and temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	10 V nominal, ±4% tolerance (9.6–10.4 V at 25 °C); ensures stable MCU core or analog sensor bias under varying load/temperature.
Max Output Current	100 mA continuous; sufficient for powering multiple low-power ICs (e.g., op-amps, logic, small microcontrollers) on a single board node.
Dropout Voltage	1.7 V typical; enables operation from 12 V rail with margin, reducing heat dissipation vs. higher-dropout regulators.
Quiescent Current	6 mA typical at 25 °C; minimizes standby power loss in battery-backed or energy-sensitive applications.
Output Noise	60 µV RMS (10 Hz–100 kHz); supports noise-sensitive analog circuits like ADC references or precision amplifiers.
SVR	37–45 dB at 120 Hz; suppresses ripple from upstream switching supplies or unregulated wall adapters.
Protection	Thermal shutdown + short-circuit current limiting; prevents failure during fault conditions without external circuitry.

Pinout & Package

Supplied in TO-92 package (3-lead plastic transistor-style housing), with lead material compliant to RoHS and halogen-free standards. Pin 1 = VOUT, Pin 2 = GND, Pin 3 = VIN - standard configuration enabling drop-in replacement of legacy 78Lxx regulators.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	VOUT	Regulated 10 V output; connects directly to load and local decoupling capacitor (0.1 µF ceramic).
Pin 2	GND	Common reference for input and output; must be low-impedance connection to PCB ground plane.
Pin 3	VIN	Unregulated DC input (12.5–23 V); requires 0.33 µF ceramic capacitor placed within 1 cm of pin.

Key Features

Feature	Design Value
No external components required	Enables minimal BOM count and PCB area usage-only two ceramic capacitors needed for stable operation.
±4% output voltage tolerance (A grade)	Tighter regulation than C-grade (±8%), improving system-level accuracy for analog sensing or reference generation.
Thermal overload and short-circuit protection	Self-protecting behavior eliminates need for external fuses or current monitors in cost-sensitive designs.
Low output noise (60 µV RMS)	Reduces signal corruption in precision analog front-ends, avoiding post-regulation filtering stages.
100 mA output capability with TO-92 package	Higher current rating than most TO-92 LDOs; suitable for multi-rail local regulation without heatsinking.

Applications

Industrial Sensor Node Power

Microcontroller Core Supply

Use Scenario: Powering 3.3 V or 5 V microcontrollers (e.g., STM32L0, PIC16) and analog sensors (e.g., temperature, pressure) from a shared 12 V bus.

IC Role / Device Role / Timing Role: Local point-of-load regulator providing clean, stable 10 V intermediate rail for internal LDOs or op-amp biasing.

Use Value: Eliminates noise coupling between digital and analog sections while maintaining tight voltage control across temperature.

Use Scenario: Supplying auxiliary 10 V rail to FPGA I/O banks or CPLD configuration circuitry requiring precise voltage margins.

IC Role / Device Role / Timing Role: Fixed-voltage source for level-shifting interfaces or high-side gate drivers needing stable reference.

Use Value: Delivers consistent timing margin for I/O standards (e.g., LVCMOS 10 V tolerant) without dynamic droop.

Legacy Equipment Replacement

Low-Power Instrumentation

Use Scenario: Direct replacement of obsolete 78L10 or Zener-resistor regulators in field-deployed test equipment.

IC Role / Device Role / Timing Role: Drop-in upgrade offering lower quiescent current and improved line/load regulation.

Use Value: Extends service life and reduces thermal stress in sealed enclosures with limited airflow.

Use Scenario: Powering portable multimeters, handheld data loggers, or battery-operated calibration tools.

IC Role / Device Role / Timing Role: Primary voltage regulator for analog front-end and display driver ICs.

Use Value: Enables >100 hr battery life via 6 mA quiescent current and compatibility with low-cost alkaline or Li-ion sources.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output linear regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM78L10ACZ/NOPB	Same 10 V output, ±5% tolerance, 100 mA rating, but higher quiescent current (5.5–8.5 mA) and lower SVR (35–40 dB).	Suitable for non-noise-critical digital-only loads; less ideal for mixed-signal systems.	Select when legacy TI footprint compatibility is required and noise performance is secondary.
MC78L10ACP	10 V output, ±5% tolerance, 100 mA, TO-92 package, but wider dropout (2.0 V min) and higher output noise (120 µV).	Better suited for higher-input-voltage systems (>15 V) where dropout margin is ample.	Prefer when sourcing from distributors with strong ON Semi inventory and thermal derating is acceptable.

Compared with LM78L10ACZ/NOPB and MC78L10ACP, the L78L10ACZ-TR offers tighter output tolerance (±4% vs. ±5%), lower noise (60 µV vs. ≥120 µV), and superior SVR-making it optimal for precision analog and long-life industrial deployments where regulation stability directly impacts measurement integrity.

Availability

L78L10ACZ-TR is available at Aetrix Electronics and suitable for industrial sensor nodes, microcontroller auxiliary supplies, and legacy equipment replacement requiring stable component supply, long-lifecycle support, and RoHS-compliant TO-92 packaging.

Supply support for L78L10ACZ-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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The L78L series belongs to ST's legacy linear regulator product line, engineered specifically for cost-sensitive, space-constrained applications requiring robustness, simplicity, and long-term availability in through-hole packages.

FAQ

What is the maximum input voltage for L78L10ACZ-TR?

The absolute maximum DC input voltage is 35 V for VO = 12–15 V configurations, but for the L78L10ACZ-TR (10 V output), the rated maximum is 23 V per Table 7 in the datasheet. Operation above 23 V risks exceeding safe power dissipation limits and triggering thermal shutdown.

Can L78L10ACZ-TR be used in place of L78L10ACZ?

Yes-the "-TR" suffix denotes tape-and-reel packaging for automated assembly; electrically and thermally identical to the tube-packaged L78L10ACZ. Pinout, specifications, and thermal characteristics are fully interchangeable-only packaging and reel quantity differ.

Does L78L10ACZ-TR require input/output capacitors?

Yes-ST specifies a 0.33 µF ceramic capacitor on VIN and 0.1 µF ceramic on VOUT, placed as close as possible to the device pins. Omitting either degrades transient response and may cause oscillation or instability under load step changes.

Is L78L10ACZ-TR suitable for battery-powered applications?

Yes-its 6 mA typical quiescent current and 1.7 V dropout enable efficient operation from single-cell Li-ion (3.7 V nominal) with boost pre-regulation or from dual-cell alkaline (3 V nominal) with appropriate input staging. However, direct battery connection requires input voltage ≥12.5 V for regulation.

L78L10ACZ-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):: 30V

Voltage - Output (Min/Fixed):: 10V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 100mA

Current - Quiescent (Iq):: 5.5 mA

Current - Supply (Max):: 6 mA

PSRR:: 45dB (120Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: 0°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

L78L10ACZ-TR FAQ

1.How can I place an order for L78L10ACZ-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L78L10ACZ-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 L78L10ACZ-TR reliable?

The price and inventory of L78L10ACZ-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L78L10ACZ-TR is usually 5 days.

3.What payment methods are accepted for L78L10ACZ-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L78L10ACZ-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L78L10ACZ-TR?

L78L10ACZ-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L78L10ACZ-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 L78L10ACZ-TR?

For technical support, including L78L10ACZ-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L78L10ACZ-TR requirements.

6.How does Aetrix verify that L78L10ACZ-TR is sourced from the original manufacturer or authorized distributors?

All L78L10ACZ-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 L78L10ACZ-TR meets industry standards.

7.What is the process for return or replacement of L78L10ACZ-TR?

All L78L10ACZ-TR units undergo pre-shipment inspection (PSI). If there is an issue with L78L10ACZ-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 L78L10ACZ-TR part is unused and in its original packaging.

Return procedure for L78L10ACZ-TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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