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onsemi MC78L09ABPRP
- Part No.:
- MC78L09ABPRP
- Manufacturer:
- onsemi
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
MC78L09ABPRP.pdf
- Description:
- IC REG LINEAR 9V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,180
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Product details
Overview
MC78L09ABPRP from onsemi is a 100 mA, fixed +9.0 V positive linear voltage regulator in TO-92 package with internal short-circuit current limiting, thermal shutdown, and no external components required. It delivers stable output under input voltages from 11.5 V to 24 V, supports −40°C to +125°C operation, and is widely used in low-power industrial sensors and automotive body electronics.
For engineers reviewing the MC78L09ABPRP datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (1.7 V typ), load regulation (15 mV max over 1–40 mA), ripple rejection (57 dB typ at 120 Hz), and thermal resistance (200°C/W in TO-92) for reliable low-current biasing in space-constrained designs.
Technical Context
The MC78L09ABPRP employs a monolithic silicon design with built-in thermal overload protection and internal current limiting-no external compensation needed. Its architecture ensures stable regulation across input variations (11.5–24 V) and load currents up to 100 mA while maintaining ±5% output accuracy over temperature.
It operates without external capacitors in most applications but benefits from a 0.33 µF input bypass capacitor when connected via long traces. The device's fixed 9.0 V output is trimmed at +25°C (8.6–9.4 V min/max) and maintains tight line regulation (20 mV max) and load regulation (15 mV max) within its specified operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +9.0 V nominal; 8.6–9.4 V over temperature and load ensures compatibility with 9 V logic rails and analog subsystems |
| Max Output Current | 100 mA continuous; sufficient for powering microcontroller peripherals, op-amps, and small-signal circuitry |
| Dropout Voltage | 1.7 V typical at 25°C; requires minimum 10.7 V input to sustain regulated 9 V output under full load |
| Ripple Rejection | 57 dB typical at 120 Hz; suppresses AC ripple from unregulated DC supplies in battery-backed or rectified systems |
| Operating Temp Range | −40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| Thermal Resistance | 200°C/W (Junction-to-Ambient, TO-92); limits power dissipation to ~625 mW at 25°C ambient |
| Quiescent Current | 3.0–6.0 mA; enables efficient operation in always-on monitoring circuits without excessive standby loss |
Pinout & Package
MC78L09ABPRP uses the TO-92 (Case 029) plastic package with straight leads and Pb-free finish. Pin 1 = Output, Pin 2 = Ground, Pin 3 = Input - standard configuration enabling direct replacement of legacy 78Lxx regulators.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Output) | Regulated +9 V supply rail | Delivers stable voltage to downstream circuitry; must be decoupled locally if driving dynamic loads |
| 2 (Ground) | Common reference node | Shared return path for input and output; critical for stability-must minimize trace inductance |
| 3 (Input) | Unregulated DC input source | Accepts 11.5–24 V DC; requires ≥2 V headroom above output to maintain regulation |
Key Features
| Feature | Design Value |
|---|---|
| Internal short-circuit protection | Limits output current during fault conditions to prevent damage without external foldback circuitry |
| Thermal shutdown | Automatically disables regulator when junction temperature exceeds safe limit (~150°C), enabling self-recovery |
| No external components required | Operates stably with only optional 0.33 µF input capacitor-reduces BOM count and PCB area |
| Pb-free TO-92 package | Complies with RoHS and J-STD-609; compatible with standard through-hole reflow and hand-soldering processes |
| AEC-Q100 stress testing | Qualified per automotive reliability standards (when ordered as NCV variant); supports functional safety-aware designs |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Powering temperature/humidity sensor ICs and signal-conditioning amplifiers in factory-floor monitoring units. IC Role / Device Role / Timing Role: Provides clean, stable +9 V bias for analog front-end circuitry and low-power MCU peripherals. Use Value: Eliminates need for external filtering or LDO sequencing-reduces component count and improves long-term calibration stability. | Use Scenario: Supplying door lock actuators, interior lighting drivers, and window motor controllers in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Regulates battery-derived 12 V down to precise +9 V for logic-level interface circuitry and EEPROM backup rails. Use Value: Withstands load dump transients up to 35 V and operates reliably across −40°C to +125°C ambient extremes. |
| Legacy Equipment Retrofit | Low-Power IoT Edge Node |
Use Scenario: Replacing obsolete 78L09 regulators in aging test equipment and medical auxiliary devices. IC Role / Device Role / Timing Role: Direct drop-in replacement delivering identical pinout, voltage, and thermal behavior. Use Value: Maintains system form factor and qualification status while adding Pb-free compliance and extended temperature support. | Use Scenario: Powering BLE/Wi-Fi SoCs, environmental sensors, and real-time clocks in battery-operated edge gateways. IC Role / Device Role / Timing Role: Supplies regulated +9 V to high-efficiency DC-DC controller bias rails and RF front-end LNA stages. Use Value: Low quiescent current (3.0 mA typ) extends battery life; ripple rejection preserves RF signal integrity in noisy environments. |
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 |
|---|---|---|---|
| MC78L09ACPRAG | Same TO-92 package and 9 V output, but rated for 0°C to +125°C (vs. −40°C to +125°C for AB grade) | Not suitable for automotive cold-cranking or industrial freezer environments requiring sub-zero startup | Select MC78L09ABPRP when guaranteed operation below 0°C is required; otherwise MC78L09ACPRAG offers cost advantage |
| NCV78L09ABDR2G | SOIC-8 package, AEC-Q100 qualified, same −40°C to +125°C range, but surface-mount only | Requires PCB redesign for SMT assembly; not interchangeable in through-hole layouts | Choose NCV78L09ABDR2G for new automotive PCBs needing enhanced vibration resistance and PPAP traceability |
Compared with MC78L09ACPRAG, MC78L09ABPRP adds extended low-temperature capability critical for outdoor or automotive use; compared with NCV78L09ABDR2G, it retains through-hole manufacturability and lower thermal resistance (200°C/W vs. ~120°C/W in SOIC-8 with minimal copper).
Availability
MC78L09ABPRP is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, and legacy equipment retrofits requiring stable component supply and long-term obsolescence management.
Supply support for MC78L09ABPRP 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MC78L00A series was designed to deliver cost-effective, rugged fixed-voltage regulation for low-current applications where simplicity, reliability, and wide temperature operation are essential-especially in automotive and industrial control systems.
FAQ
What is the maximum input voltage rating for MC78L09ABPRP?
The MC78L09ABPRP has an absolute maximum input voltage of 35 V for 12–18 V output variants. For the +9 V version specifically, the datasheet specifies 35 V as the absolute maximum rating under the "Input Voltage (12 V–18 V)" row in Absolute Maximum Ratings. Operation above this level risks permanent damage.
Does MC78L09ABPRP require input and output capacitors for stable operation?
MC78L09ABPRP does not require external capacitors for basic stability, but a 0.33 µF input bypass capacitor is recommended when connected via long traces or high-impedance sources. An output capacitor (0.1 µF) is optional but improves transient response-neither is mandatory for regulation per the datasheet.
What is the thermal resistance (RJA) of MC78L09ABPRP in its TO-92 package?
The MC78L09ABPRP in TO-92 (Case 029) has a thermal resistance of 200°C/W (Junction-to-Ambient) with no heatsink, as specified in the Thermal Characteristics table. This value assumes standard PCB mounting with minimal copper; performance improves with added copper area per Figure 7.
Is MC78L09ABPRP pin-compatible with older 78L09 variants from other manufacturers?
Yes, MC78L09ABPRP uses the industry-standard TO-92 pinout (Pin 1 = Output, Pin 2 = Ground, Pin 3 = Input) and matches electrical behavior of legacy 78L09 regulators. It serves as a direct replacement in existing designs-no PCB changes required-provided the −40°C to +125°C rating meets system requirements.
What is the typical dropout voltage of MC78L09ABPRP at full load and room temperature?
The typical dropout voltage of MC78L09ABPRP is 1.7 V at TJ = +25°C and IO = 40 mA, as confirmed in the Electrical Characteristics table for MC78L09AC/AB. This means the input must remain ≥10.7 V to sustain 9.0 V output under full 40 mA load at room temperature.
MC78L09ABPRP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 57dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
MC78L09ABPRP FAQ
1.How can I place an order for MC78L09ABPRP through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78L09ABPRP 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 MC78L09ABPRP reliable?
The price and inventory of MC78L09ABPRP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78L09ABPRP is usually 5 days.
3.What payment methods are accepted for MC78L09ABPRP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78L09ABPRP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78L09ABPRP?
MC78L09ABPRP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78L09ABPRP 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 MC78L09ABPRP?
For technical support, including MC78L09ABPRP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78L09ABPRP requirements.
6.How does Aetrix verify that MC78L09ABPRP is sourced from the original manufacturer or authorized distributors?
All MC78L09ABPRP 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 MC78L09ABPRP meets industry standards.
7.What is the process for return or replacement of MC78L09ABPRP?
All MC78L09ABPRP units undergo pre-shipment inspection (PSI). If there is an issue with MC78L09ABPRP, 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 MC78L09ABPRP part is unused and in its original packaging.
Return procedure for MC78L09ABPRP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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