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

STMicroelectronics L78L06ACZ-TR

Name: L78L06ACZ-TR
Brand: STMicroelectronics
SKU: L78L06ACZ-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L78L06ACZ-TR

Manufacturer:: STMicroelectronics

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

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

Datasheet:: L78L06ACZ-TR.pdf

Description:: IC REG LINEAR 6V 100MA TO92-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,805

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Product details

Overview

L78L06ACZ-TR from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 6 V output at up to 100 mA, featuring internal current limiting, thermal overload protection, and short-circuit protection. It requires no external components, operates over 0 to 125 °C junction temperature, 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 L78L06ACZ-TR datasheet, L78L06ACZ-TR pinout, L78L06ACZ-TR application, or L78L06ACZ-TR equivalent, this device is selected for cost-sensitive, space-constrained 6 V biasing where dropout voltage (1.7 V), quiescent current (6 mA at 25 °C), noise performance (50 µV RMS), and ±4% output tolerance are critical design parameters.

Technical Context

The L78L06ACZ-TR implements a monolithic silicon voltage regulator with built-in thermal shutdown and foldback current limiting. Its architecture eliminates need for external compensation or support capacitors beyond minimum 0.33 µF input and 0.1 µF output ceramic capacitors.

It maintains regulation across input voltages from 8.5 V to 20 V, delivers stable 6 V output under load currents from 1 mA to 100 mA, and achieves supply voltage rejection of 39–46 dB at 120 Hz - enabling robust operation in noisy DC-DC post-regulation and battery-powered subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	6.0 V ±4% (5.76–6.24 V at 25 °C); ensures compatibility with 6 V logic and analog circuitry requiring tight DC accuracy
Max Output Current	100 mA; sufficient for powering small MCUs, op-amps, and digital sensors without external pass devices
Dropout Voltage	1.7 V at 40 mA; enables operation from 8.5 V input while maintaining regulation - critical for single-cell LiFePO₄ or dual-cell alkaline systems
Quiescent Current	6 mA at 25 °C; low enough for always-on monitoring circuits yet higher than ultra-low-I_Q regulators - reflects trade-off for robustness
Output Noise	50 µV RMS (10 Hz–100 kHz); suitable for noise-sensitive analog front-ends like ADC references and precision comparators
Supply Rejection	39–46 dB at 120 Hz; suppresses ripple from upstream switching converters, reducing need for additional LC filtering
Thermal Protection	Internal thermal shutdown; prevents damage during sustained overload or inadequate PCB copper area - no external thermal sensor required

Pinout & Package

Package: TO-92 (Z suffix), through-hole, 3-pin plastic package with standard lead spacing and JEDEC TO-92 outline dimensions.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	VOUT	Regulated 6 V output; connects directly to load and local bypass capacitor - must be decoupled with ≥0.1 µF ceramic
Pin 2	GND	Ground reference for both input and output; shared return path - requires low-impedance PCB trace to minimize noise coupling
Pin 3	VIN	Unregulated input (8.5–20 V); must be filtered with ≥0.33 µF ceramic before regulator input to ensure stability

Key Features

Feature	Design Value
No external components required	Enables minimal BOM count and PCB footprint - only two ceramic capacitors needed for stable operation
±4% output voltage tolerance (A grade)	Meets tighter accuracy requirements than ±8% C-grade variants, reducing need for downstream trimming in 6 V analog signal chains
Thermal overload and short-circuit protection	Allows safe operation under fault conditions without external current-sense or shutdown circuitry - improves system reliability
Low output noise (50 µV RMS)	Supports high-resolution 12-bit+ ADCs and low-noise instrumentation amplifiers without additional LDO filtering stages
Fixed 6 V output	Eliminates resistor divider setup errors and drift; simplifies layout and validation versus adjustable regulators

Applications

Industrial Sensor Node

Microcontroller Power Rail

Use Scenario: Low-power wireless sensor node powered by two AA batteries or energy harvesting, requiring clean 6 V supply for signal conditioning and RF transceiver bias.

IC Role / Device Role / Timing Role: Primary local regulator converting 3–9 V source to stable 6 V for op-amp buffers, ADC reference, and sub-GHz transceiver VDD.

Use Value: 1.7 V dropout enables >30% longer runtime from declining battery voltage; 50 µV noise avoids SNR degradation in 16-bit delta-sigma ADC measurements.

Use Scenario: Embedded control board using STM32F0 or similar MCU with 6 V peripheral interface (e.g., RS-485 transceivers, optocoupler drivers).

IC Role / Device Role / Timing Role: Dedicated 6 V rail generator for isolated communication interfaces, decoupled from main 3.3 V core domain.

Use Value: ±4% tolerance ensures RS-485 driver compliance across temperature; thermal protection prevents latch-up during bus fault events.

Legacy Equipment Retrofit

Portable Test Instrument

Use Scenario: Replacement of aging 6 V Zener/resistor regulator in legacy industrial panel meters or analog controllers.

IC Role / Device Role / Timing Role: Drop-in upgrade providing regulated 6 V with lower quiescent current and improved line/load regulation vs. discrete solution.

Use Value: 6 mA I_Q reduces total standby power by >50% vs. typical 15 mA Zener bias; 30 mV load regulation minimizes display flicker under varying backlight load.

Use Scenario: Handheld multimeter or portable oscilloscope requiring ultra-stable 6 V reference for analog front-end scaling and DAC calibration.

IC Role / Device Role / Timing Role: Precision voltage source feeding 12-bit DAC and analog multiplexer - not for main system power.

Use Value: 50 µV broadband noise and 39 dB SVR prevent measurement offset drift; TO-92 package allows direct socket replacement of legacy regulators.

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
LM78L06ACZ	Same 6 V output, ±4% tolerance, but higher quiescent current (5.5–8 mA) and lower SVR (35–42 dB); TO-92 package identical	Marginally higher noise (65 µV) and weaker ripple rejection - less suitable for precision analog sensing	Select if LM78L family qualification is mandated; verify thermal margin due to higher I_Q dissipation
MC78L06ACP	Identical electrical specs and TO-92-3 package; manufactured by ON Semiconductor with same pinout and thermal characteristics	No functional difference; qualified for automotive AEC-Q100 Grade 3 (−40 to 125 °C) where ST part is industrial grade	Choose for automotive-qualified designs requiring extended temperature validation; otherwise functionally interchangeable

Compared with LM78L06ACZ and MC78L06ACP, the L78L06ACZ-TR offers superior supply rejection (39–46 dB vs. ≤42 dB) and lower output noise (50 µV vs. ≥65 µV), making it preferred for high-fidelity analog subsystems - while MC78L06ACP adds AEC-Q100 qualification for harsh-environment deployment.

Availability

L78L06ACZ-TR is available at Aetrix Electronics and suitable for industrial sensor nodes, microcontroller peripheral rails, legacy equipment retrofits, and portable test instruments requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for L78L06ACZ-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 analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The L78L series belongs to ST's legacy linear regulator product line, engineered specifically for cost-effective, robust local regulation in space-constrained PCBs where simplicity, reliability, and wide operating temperature range are prioritized over ultra-low quiescent current.

FAQ

What is the minimum input voltage required for regulation at full 100 mA load?

The L78L06ACZ-TR requires a minimum input voltage of 7.7 V to maintain 6 V output at 100 mA, calculated from its 1.7 V dropout voltage specification. Below this threshold, output voltage drops linearly with input; operation below 7.7 V is not guaranteed to regulate.

Can this regulator be used with ceramic output capacitors only?

Yes - the L78L06ACZ-TR is stable with ceramic output capacitors ≥0.1 µF, as confirmed in ST's datasheet Figure 27 (stability vs. ESR). Unlike older 78xx regulators, it does not require tantalum or aluminum electrolytic capacitors for phase margin.

Is the TO-92 package thermally adequate for continuous 100 mA operation?

At 100 mA and 12 V input, power dissipation is ~600 mW. With TO-92 R_thJA = 200 °C/W, junction temperature rise exceeds safe limits without PCB copper heatsinking. ST recommends ≥6 cm² of 2-oz copper connected to Pin 2 (GND) for full-load operation.

Does the 'Z' in L78L06ACZ-TR indicate RoHS compliance?

Yes - the 'Z' suffix per STMicroelectronics ordering nomenclature denotes RoHS-compliant, halogen-free packaging. The '-TR' suffix indicates tape-and-reel packaging (3,000 units per reel), suitable for automated SMT assembly despite the TO-92 through-hole form factor.

L78L06ACZ-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):: 6V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 100mA

Current - Quiescent (Iq):: 5.5 mA

Current - Supply (Max):: 6 mA

PSRR:: 46dB (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

L78L06ACZ-TR FAQ

1.How can I place an order for L78L06ACZ-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L78L06ACZ-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 L78L06ACZ-TR reliable?

The price and inventory of L78L06ACZ-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L78L06ACZ-TR is usually 5 days.

3.What payment methods are accepted for L78L06ACZ-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L78L06ACZ-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L78L06ACZ-TR?

L78L06ACZ-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L78L06ACZ-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 L78L06ACZ-TR?

For technical support, including L78L06ACZ-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L78L06ACZ-TR requirements.

6.How does Aetrix verify that L78L06ACZ-TR is sourced from the original manufacturer or authorized distributors?

All L78L06ACZ-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 L78L06ACZ-TR meets industry standards.

7.What is the process for return or replacement of L78L06ACZ-TR?

All L78L06ACZ-TR units undergo pre-shipment inspection (PSI). If there is an issue with L78L06ACZ-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 L78L06ACZ-TR part is unused and in its original packaging.

Return procedure for L78L06ACZ-TR:

1.Submit a request within 90 days.

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

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