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onsemi MC78LC15NTRG
- Part No.:
- MC78LC15NTRG
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MC78LC15NTRG.pdf
- Description:
- IC REG LINEAR 1.5V 50MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,618
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Product details
Overview
MC78LC15NTRG from onsemi is a fixed-output, micropower low-dropout linear voltage regulator delivering 1.5 V at up to 50 mA with 1.1 µA typical quiescent current, 35 mV dropout (at 1 mA), and ±2.5% output voltage accuracy over −40°C to +85°C - designed for battery-powered handheld instruments and portable electronics requiring ultra-low standby power.
For engineers reviewing the MC78LC15NTRG datasheet, pinout, applications, or equivalent options, key selection criteria include its SOT-23-5 package, ceramic-capacitor compatibility (min. 0.1 µF), 12 V max input, and industrial temperature range - critical for space-constrained, long-life portable designs.
Technical Context
The MC78LC15NTRG integrates a PMOS pass transistor, precision voltage reference, error amplifier, and internal resistor network to deliver stable 1.5 V regulation. Its ultra-low IQ enables multi-year operation from coin cells or primary batteries in always-on sensing nodes.
Dropout voltage remains ≤35 mV at 1 mA load and rises to ≤70 mV at full rated output, while line regulation holds to 0.05%/V and load regulation to 40 mV across 1–10 mA - enabling robust performance under varying source and load conditions in compact battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5 V ±2.5% (1.455–1.545 V at 25°C; maintains regulation across −40°C to +85°C) |
| Quiescent Current | 1.1 µA typical (enables >10-year battery life in 10 µA standby systems) |
| Dropout Voltage | 35 mV at 1 mA (supports regulation down to Vin = 1.535 V; critical for single-cell Li-ion or alkaline operation) |
| Max Input Voltage | 12 V (allows direct connection to unregulated 9 V batteries or noisy DC rails) |
| Output Current | 50 mA (sufficient for microcontrollers, sensors, and RF transceivers in portable devices) |
| Thermal Resistance | 280 °C/W (Junction-to-Ambient, SOT-23-5 package; requires minimal PCB copper for thermal management) |
| Operating Temp | −40°C to +85°C (industrial-grade reliability for outdoor or automotive-accessory environments) |
Pinout & Package
Housed in a Pb-free Thin SOT-23-5 (Case 483) surface-mount package measuring 3.0 mm × 1.5 mm × 0.95 mm, with exposed thermal pad connected to Pin 2 (Vin).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power supply ground reference; must be low-impedance connection to minimize noise and regulation error |
| 2 | Vin | Positive input voltage; also connected to thermal pad - requires adequate copper pour for heat dissipation |
| 3 | Vout | Regulated 1.5 V output; connects directly to load and output capacitor (min. 0.1 µF ceramic) |
| 4 | N/C | No internal connection; electrically isolated - may be left floating or tied to GND for mechanical stability |
| 5 | N/C | No internal connection; electrically isolated - no routing or biasing required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.1 µA typical - extends shelf life and runtime in battery-critical applications like smoke detectors and IoT sensors |
| Ceramic capacitor compatible | Stable with ≥0.1 µF X5R/X7R ceramic output cap - eliminates need for costly tantalum or electrolytic capacitors |
| High accuracy output | ±2.5% tolerance over full temperature and load range - ensures reliable logic-level compliance for 1.5 V I/O domains |
| Low dropout architecture | 35 mV dropout at 1 mA - enables regulation from near-dead 1.5 V alkaline cells or partially discharged LiFePO₄ sources |
| Industrial temperature range | −40°C to +85°C operation - validated for use in automotive cabins, industrial handhelds, and outdoor instrumentation |
Applications
| Battery-Powered Medical Sensors | Portable Barcode Scanners |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) node powered by CR2032 coin cell, operating 24/7 with periodic BLE transmission. IC Role / Device Role / Timing Role: Primary 1.5 V supply for ultra-low-power ADC, op-amp front-end, and BLE SoC I/O domain. Use Value: 1.1 µA quiescent current enables >5-year battery life; 35 mV dropout sustains regulation as cell voltage drops to 1.535 V. | Use Scenario: Handheld laser scanner used in retail warehouses, powered by rechargeable NiMH pack with variable voltage (1.2–1.4 V/cell). IC Role / Device Role / Timing Role: Stable 1.5 V rail for CMOS image sensor interface and laser driver logic. Use Value: ±2.5% output accuracy prevents sensor timing skew; ceramic-capacitor compatibility reduces BOM cost and board area. |
| Wireless Remote Controls | Industrial Data Loggers |
Use Scenario: Sub-GHz remote control for HVAC systems, operating on two AA alkaline cells with 10+ year shelf life requirement. IC Role / Device Role / Timing Role: Always-on 1.5 V supply for RF transceiver wake-up circuitry and microcontroller RTC domain. Use Value: Ultra-low IQ minimizes self-discharge; 12 V max input tolerates transient spikes during battery insertion or ESD events. | Use Scenario: Ruggedized environmental logger deployed in field enclosures, powered by primary lithium thionyl chloride (LiSOCl₂) battery. IC Role / Device Role / Timing Role: Precision 1.5 V reference and supply for 16-bit sigma-delta ADC and real-time clock. Use Value: −40°C to +85°C rating ensures operation in desert or arctic conditions; 280 °C/W θJA allows passive thermal design without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/TT | 1.5 V, 250 mA output, 1.6 µA IQ, SOT-23-3 package (3-pin, no N/C pins) | Higher output current but larger dropout (178 mV @ 250 mA); lacks dual N/C pins for layout flexibility | Select when >50 mA load or simplified 3-pin layout is required; verify thermal derating at full load |
| TPS70615DRVR | 1.5 V, 150 mA, 1.7 µA IQ, 75 mV dropout @ 150 mA, WSON-6 package | Higher current and smaller footprint, but higher minimum output capacitance (1 µF) and tighter ESR requirements | Choose for higher-current mixed-signal systems where board space is constrained and ceramic cap ESR is controlled |
Compared with MCP1700T-1502E/TT and TPS70615DRVR, the MC78LC15NTRG offers the lowest quiescent current (1.1 µA) and smallest dropout (35 mV) at light loads - making it optimal for multi-year battery life in sub-50 mA portable instrumentation, despite its lower max current and SOT-23-5 pin count.
Availability
MC78LC15NTRG is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable barcode scanners, wireless remote controls, and industrial data loggers requiring stable component supply with long-term lifecycle assurance.
Supply support for MC78LC15NTRG 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The MC78LC00 series was developed specifically for micropower, low-dropout regulation in space- and battery-constrained portable electronics - emphasizing ultra-low IQ, ceramic-capacitor stability, and industrial temperature resilience.
FAQ
What is the maximum input voltage rating for the MC78LC15NTRG?
The MC78LC15NTRG has a maximum input voltage rating of 12 V, as specified in the Absolute Maximum Ratings table. This allows safe operation from common unregulated sources such as 9 V batteries or noisy DC rails, provided power dissipation limits (140 mW at TA = 85°C) are respected. Exceeding 12 V risks permanent device damage.
Does the MC78LC15NTRG require an external output capacitor, and what type is recommended?
Yes, the MC78LC15NTRG requires a minimum 0.1 µF output capacitor, and ceramic (X5R/X7R) types are explicitly recommended in the datasheet. Unlike many LDOs, it does not require specific ESR or minimum current, enabling stable operation with low-cost, small-footprint MLCCs - simplifying design and reducing BOM cost versus tantalum alternatives.
What is the dropout voltage of the MC78LC15NTRG at 10 mA output current?
The dropout voltage of the MC78LC15NTRG at 10 mA output current is 70 mV, per the Electrical Characteristics table (measured at Vout −3.0%). This means the device maintains regulation as long as Vin ≥ 1.57 V, supporting extended runtime from aging alkaline or LiFePO₄ cells where headroom is minimal.
Can the MC78LC15NTRG be used in automotive cabin applications?
Yes, the MC78LC15NTRG is qualified for industrial temperature operation (−40°C to +85°C), which covers most non-under-hood automotive cabin environments such as infotainment accessories, remote keyless entry modules, or dashboard sensors. It is not AEC-Q100 qualified, so mission-critical power domains require additional validation per system-level requirements.
How does the quiescent current of the MC78LC15NTRG vary with input voltage?
The quiescent current of the MC78LC15NTRG remains stable at ~1.1 µA typical across its full 1.535 V to 12 V input range, as confirmed by Figure 10 in the datasheet. This flat IQ profile ensures predictable battery life regardless of source voltage sag or surge - a key advantage over regulators whose ground current rises significantly with Vin.
MC78LC15NTRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.07V @ 1mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 3.6 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
MC78LC15NTRG FAQ
1.How can I place an order for MC78LC15NTRG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78LC15NTRG 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 MC78LC15NTRG reliable?
The price and inventory of MC78LC15NTRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78LC15NTRG is usually 5 days.
3.What payment methods are accepted for MC78LC15NTRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78LC15NTRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78LC15NTRG?
MC78LC15NTRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78LC15NTRG 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 MC78LC15NTRG?
For technical support, including MC78LC15NTRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78LC15NTRG requirements.
6.How does Aetrix verify that MC78LC15NTRG is sourced from the original manufacturer or authorized distributors?
All MC78LC15NTRG 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 MC78LC15NTRG meets industry standards.
7.What is the process for return or replacement of MC78LC15NTRG?
All MC78LC15NTRG units undergo pre-shipment inspection (PSI). If there is an issue with MC78LC15NTRG, 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 MC78LC15NTRG part is unused and in its original packaging.
Return procedure for MC78LC15NTRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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