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STMicroelectronics L78L10CD13TR
- Part No.:
- L78L10CD13TR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
L78L10CD13TR.pdf
- Description:
- IC REG LINEAR 10V 100MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,913
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Product details
Overview
L78L10CD13TR from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 10 V output at up to 100 mA, featuring thermal overload protection, short-circuit protection, and ±4% output voltage tolerance (C grade). It requires no external components and operates with a 1.7 V dropout voltage, making it suitable for local on-card regulation in microcontroller power rails and sensor interface circuits.
For engineers reviewing the L78L10CD13TR datasheet, L78L10CD13TR pinout, L78L10CD13TR application, or L78L10CD13TR equivalent, this device serves as a drop-in replacement for Zener diode/resistor regulators-offering lower quiescent current (6 mA typ.), reduced output noise (60 µV), and improved supply voltage rejection (37–45 dB) in space-constrained industrial and embedded designs.
Technical Context
The L78L10CD13TR implements internal current limiting and thermal shutdown circuitry, enabling robust operation without external protection components. Its architecture is optimized for fixed-voltage local regulation where low noise, stable DC bias, and minimal board footprint are critical.
It functions as a monolithic series pass regulator with a PNP transistor-based control element, supporting input voltages from 12.5 V to 23 V and maintaining regulation across –40 °C to +125 °C junction temperature range. The device exhibits 40 mA load current stability under typical test conditions (VI = 16 V, CI = 0.33 µF, CO = 0.1 µF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10 V ±4% (C grade) - ensures stable logic-level supply for MCU peripherals and analog sensors |
| Max Output Current | 100 mA - sufficient for powering small microcontrollers, op-amps, or digital ICs on local PCB sections |
| Dropout Voltage | 1.7 V - enables operation from 12.5 V input while maintaining regulation down to 10 V output |
| Quiescent Current | 6 mA (typ. at 25 °C) - minimizes standby power loss in battery-backed or energy-sensitive systems |
| Output Noise | 60 µV RMS (10 Hz–100 kHz) - supports noise-sensitive analog front-ends like ADC references or precision amplifiers |
| Supply Rejection | 37–45 dB (120 Hz) - suppresses ripple from unregulated DC/DC or rectified AC sources |
| Thermal Protection | Internal thermal shutdown - prevents damage during sustained overload or poor heatsinking |
Pinout & Package
Package: SOT-89 (3-pin, surface-mount, thermally enhanced plastic package with exposed die attach pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VOUT) | Regulated output terminal | Delivers stable 10 V to load; requires 0.1 µF ceramic capacitor (CO) for stability |
| Pin 2 (GND) | Ground reference | Common return path for input/output currents; must be low-impedance connection to minimize noise |
| Pin 3 (VIN) | Unregulated input terminal | Accepts 12.5–23 V DC input; requires 0.33 µF ceramic capacitor (CI) close to pin for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables single-chip local regulation-reduces BOM count and layout area vs. discrete Zener/resistor solutions |
| Thermal overload protection | Automatically disables output above safe junction temperature, eliminating need for external thermal monitoring |
| Short-circuit protection | Limits output current during fault conditions, preventing damage to regulator or upstream supply |
| Low output noise (60 µV) | Supports clean analog signal chains without requiring additional LC filtering stages |
| ±4% output tolerance (C grade) | Meets tight voltage margin requirements for 10 V analog references and 3.3/5 V logic level shifters |
Applications
| Industrial Sensor Interface | Microcontroller Local Power Rail |
|---|---|
Use Scenario: Powering analog-output temperature/humidity sensors and 10-bit ADCs in factory automation nodes. IC Role / Device Role / Timing Role: Provides low-noise, stable 10 V reference and excitation voltage for ratiometric sensor bridges. Use Value: 60 µV output noise and 37–45 dB SVR ensure <0.05% measurement error drift under varying input ripple. |
Use Scenario: Supplying 10 V to external DACs or op-amp bias networks in STM32-based edge controllers. IC Role / Device Role / Timing Role: Acts as dedicated local regulator for analog subsystems, decoupling them from noisy digital core rails. Use Value: 1.7 V dropout allows use with 12 V intermediate bus, reducing need for multi-stage conversion. |
| IoT Node Battery Backup Circuit | Legacy Equipment Voltage Translation |
Use Scenario: Regulating backup power from LiSOCl₂ cells (3.6 V nominal) boosted to 12 V, then stepped to 10 V for RTC and SRAM retention. IC Role / Device Role / Timing Role: Final-stage linear regulator ensuring precise 10 V for timekeeping accuracy and nonvolatile memory hold. Use Value: 6 mA quiescent current extends battery life beyond 5 years in always-on monitoring applications. |
Use Scenario: Replacing obsolete 10 V Zener/resistor regulators in legacy PLC I/O modules. IC Role / Device Role / Timing Role: Direct functional upgrade with identical pinout and improved thermal reliability. Use Value: Eliminates Zener self-heating drift and resistor tolerance stack-up, improving long-term voltage stability by ±0.5%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM78L10ACZ/NOPB | ±5% output tolerance, TO-92 package, higher RthJA (200 °C/W), 7.5 mA quiescent current | Less suitable for SMT production or high-ambient-temperature environments due to thermal limitations | Select when through-hole assembly or legacy footprint compatibility is required |
| MC78L10CP | ±5% tolerance, TO-92, no guaranteed 100 mA output at 125 °C, 6.5 mA quiescent current | Lower thermal performance limits continuous 100 mA operation in compact enclosures | Prefer for cost-sensitive consumer-grade applications with ambient <70 °C |
Compared with LM78L10ACZ/NOPB and MC78L10CP, the L78L10CD13TR offers tighter tolerance (±4%), superior thermal resistance (55 °C/W vs. 200/150 °C/W), and guaranteed 100 mA delivery across –40 °C to +125 °C-making it optimal for industrial SMT designs demanding long-term stability and high-reliability operation.
Availability
L78L10CD13TR is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller local power rails, and IoT node battery backup circuits requiring stable component supply and long-lifecycle support.
Supply support for L78L10CD13TR 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, specializing in automotive, industrial, and power management ICs.
The L78L series was designed specifically for cost-effective, robust local regulation in space-constrained embedded systems-emphasizing simplicity, reliability, and compatibility with legacy 78xx footprints while integrating modern protection features.
FAQ
What is the minimum input voltage required for stable 10 V output?
The L78L10CD13TR requires a minimum input voltage of 11.7 V to maintain regulation, based on its 1.7 V dropout voltage specification. At full 100 mA load and 125 °C junction temperature, the dropout may increase slightly; design margin recommends ≥12.5 V input for reliable operation across temperature and load extremes.
Can this regulator be used in parallel to increase output current?
No-L78L10CD13TR is not designed for parallel operation. Its internal current-limiting architecture and lack of current-sharing control make paralleling unsafe and unstable. For >100 mA applications, use a higher-current regulator (e.g., L7810CD2T) or add an external pass transistor with proper biasing.
Is a heat sink required for continuous 100 mA operation?
A heat sink is not required for continuous 100 mA operation at ambient temperatures ≤50 °C with standard 1 cm² copper pour on the SOT-89 thermal pad. At 70 °C ambient or higher, a 2–3 cm² copper area is recommended to maintain junction temperature below 125 °C per the datasheet's RthJA = 55 °C/W rating.
Does the device meet RoHS and REACH compliance?
Yes-L78L10CD13TR is RoHS-compliant (Pb-free, halogen-free) and REACH-conformant per STMicroelectronics' official product change notices and material declarations (DocID2145 Rev 25, February 2016). Full compliance documentation is available via ST's Quality & Reliability portal using the device's full order code.
L78L10CD13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
L78L10CD13TR FAQ
1.How can I place an order for L78L10CD13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for L78L10CD13TR 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 L78L10CD13TR reliable?
The price and inventory of L78L10CD13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L78L10CD13TR is usually 5 days.
3.What payment methods are accepted for L78L10CD13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L78L10CD13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L78L10CD13TR?
L78L10CD13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L78L10CD13TR 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 L78L10CD13TR?
For technical support, including L78L10CD13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L78L10CD13TR requirements.
6.How does Aetrix verify that L78L10CD13TR is sourced from the original manufacturer or authorized distributors?
All L78L10CD13TR 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 L78L10CD13TR meets industry standards.
7.What is the process for return or replacement of L78L10CD13TR?
All L78L10CD13TR units undergo pre-shipment inspection (PSI). If there is an issue with L78L10CD13TR, 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 L78L10CD13TR part is unused and in its original packaging.
Return procedure for L78L10CD13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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