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onsemi MC78FC30HT1
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- Part No.:
- MC78FC30HT1
- Manufacturer:
- onsemi
- Package:
- TO-243AA
- Datasheet:
-
MC78FC30HT1.pdf
- Description:
- IC REG LINEAR 3V 50MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
MC78FC30HT1 from onsemi is a micropower, ultra-low dropout linear voltage regulator delivering 3.0 V ±2.5% output with 1.1 µA typical quiescent current and 100 mV dropout at 10 mA, designed for battery-powered video instruments and handheld communication equipment.
For engineers reviewing the MC78FC30HT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its SOT−89 package, −30°C to +80°C operating ambient range, 120 mA max output current, and compatibility with low-ESR ceramic or tantalum output capacitors.
Technical Context
The MC78FC30HT1 integrates a precision voltage reference, error amplifier, driver transistor, feedback resistors, and current-limit protection in a monolithic IC. It operates across 2.0 V to 10 V input while maintaining regulation down to 100 mV input-output differential at light load.
Its internal architecture enables stable operation with only 0.1 µF output capacitance, supports line regulation of 0.1% over full input range, and exhibits ±100 ppm/°C output voltage temperature coefficient - critical for portable systems experiencing thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±2.5% (measured at Vin = 5.0 V, IO = 10 mA; ensures tight regulation for 3.3 V logic rail tolerance) |
| Quiescent Current | 1.1 µA typical (enables multi-year battery life in always-on sensor nodes or remote controls) |
| Dropout Voltage | 100 mV at 10 mA (allows operation down to 3.1 V input when powering 3.0 V circuitry from single Li-ion cell) |
| Max Output Current | 120 mA (supports moderate-power peripherals like OLED displays or RF transceivers) |
| Line Regulation | 0.1% (maintains <±3 mV output shift over 3.1–10 V input range; reduces need for post-regulation filtering) |
| Operating Ambient Temp | −30°C to +80°C (validated for outdoor handheld devices and automotive cabin electronics) |
| Package | SOT−89 (3-pin surface-mount; tab-connected to GND for thermal and EMI performance) |
Pinout & Package
SOT−89 package (Case 1213, H suffix) with exposed thermal tab electrically connected to Pin 2 (GND). Compact 4.5 × 2.5 mm footprint optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (Vin) | Accepts unregulated DC input (2.0–10 V); requires local 0.1 µF bypass capacitor |
| 2 | Ground (GND) | Reference node and thermal path; tab is internally bonded to this pin |
| 3 | Output (VO) | Regulated 3.0 V supply; requires 0.1 µF low-ESR capacitor to ground for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.1 µA typical enables >10-year shelf life in coin-cell–powered IoT sensors |
| Low dropout voltage | 100 mV at 10 mA allows efficient use of aging or partially discharged batteries |
| High accuracy output | ±2.5% tolerance meets requirements for analog front-ends and ADC reference rails |
| Integrated current limit | Protects against short-circuit faults without external components |
| Pb-free construction | Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles |
Applications
| Portable Medical Monitors | Handheld Barcode Scanners |
|---|---|
Use Scenario: Battery-powered ECG or pulse oximeter units requiring continuous 3.0 V supply during field use. IC Role / Device Role / Timing Role: Primary voltage regulator for analog signal chain and microcontroller core rail. Use Value: 1.1 µA quiescent current extends single CR2032 battery life beyond 2 years in standby mode. |
Use Scenario: Ruggedized industrial barcode readers powered by rechargeable Li-ion packs. IC Role / Device Role / Timing Role: Stable 3.0 V source for CMOS image sensor and laser driver circuitry. Use Value: 100 mV dropout enables reliable operation down to 3.1 V battery voltage, maximizing usable cell capacity. |
| Wireless Sensor Nodes | Video Endoscopes |
Use Scenario: Low-power Zigbee/Bluetooth LE sensor nodes deployed in remote infrastructure monitoring. IC Role / Device Role / Timing Role: Power management IC for ultra-low-duty-cycle wake-up and transmission cycles. Use Value: ±2.5% output accuracy ensures consistent ADC reference voltage across temperature, improving measurement repeatability. |
Use Scenario: Miniaturized medical video endoscopes using flexible printed circuits and miniature optics. IC Role / Device Role / Timing Role: Local regulation for CMOS image sensor and LED illumination drivers. Use Value: SOT−89 thermal tab connection to PCB ground plane maintains junction temperature below 125°C under 80 mA load at 80°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/MB | 1.6 µA quiescent current; 175 mV dropout at 250 mA; SOT-23-3 package | Higher IQ and larger dropout reduce battery runtime and minimum input headroom | Prefer MC78FC30HT1 where sub-2 µA IQ and <150 mV dropout are required |
| TPS78030QDSERQ1 | 500 nA IQ; 200 mV dropout at 150 mA; AEC-Q100 qualified; 2.2 V min input | Automotive-grade qualification adds cost and complexity not needed for consumer portables | Choose MC78FC30HT1 for cost-sensitive industrial handhelds without automotive certification needs |
Compared with MCP1700T-3002E/MB and TPS78030QDSERQ1, the MC78FC30HT1 delivers the lowest combination of quiescent current (1.1 µA) and dropout voltage (100 mV at 10 mA) in a thermally enhanced SOT−89 package - making it optimal for space- and energy-constrained battery-powered instrumentation.
Availability
MC78FC30HT1 is available at Aetrix Electronics and suitable for portable medical monitors, wireless sensor nodes, handheld barcode scanners, and video endoscopes requiring stable component supply with guaranteed long-term sourcing.
Supply support for MC78FC30HT1 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 MC78FC00 series was developed specifically for micropower, ultra-low-dropout regulation in battery-powered video and communications equipment - prioritizing quiescent current, thermal efficiency, and compact packaging.
FAQ
What is the maximum input voltage rating for the MC78FC30HT1?
The MC78FC30HT1 has an absolute maximum input voltage of 10 V DC, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable long-term function, the recommended operating input range is 2.0 V to 10 V, with optimal performance observed between 3.1 V and 8.0 V when regulating 3.0 V output.
Does the MC78FC30HT1 require an output capacitor, and what type is recommended?
Yes, the MC78FC30HT1 requires a minimum 0.1 µF output capacitor connected between VO and GND for stability. The datasheet explicitly recommends aluminum, tantalum, or multilayer ceramic capacitors - with solid tantalum preferred for operation below −25°C. ESR must remain ≤3.0 Ω across temperature to prevent oscillation.
Is the thermal tab of the MC78FC30HT1 electrically connected, and to which pin?
Yes, the exposed thermal tab on the MC78FC30HT1 SOT−89 package is electrically connected to Pin 2 (GND), as confirmed in the Pin Connections diagram and Marking Diagram section. This connection provides both thermal dissipation and a low-inductance ground return path critical for noise-sensitive analog applications.
What is the load regulation specification for the MC78FC30HT1, and how does it impact system design?
The MC78FC30HT1 exhibits 40 mV typical load regulation (up to 80 mV max) over 1.0–10 mA output current change. This means output voltage shifts no more than ±40 mV as load varies - enabling direct powering of 3.0 V microcontrollers without additional buffering, provided system voltage margins accommodate this variation.
Can the MC78FC30HT1 be used in automotive cabin applications?
Yes, the MC78FC30HT1 is rated for −30°C to +80°C operating ambient temperature, covering standard automotive cabin environments. While not AEC-Q100 qualified, its thermal performance, low dropout, and stability with ceramic capacitors make it suitable for non-safety-critical infotainment or telematics modules where qualification is not mandated.
MC78FC30HT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 40mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 3.3 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -30°C ~ 80°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
MC78FC30HT1 FAQ
1.How can I place an order for MC78FC30HT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78FC30HT1 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 MC78FC30HT1 reliable?
The price and inventory of MC78FC30HT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78FC30HT1 is usually 5 days.
3.What payment methods are accepted for MC78FC30HT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78FC30HT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78FC30HT1?
MC78FC30HT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78FC30HT1 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 MC78FC30HT1?
For technical support, including MC78FC30HT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78FC30HT1 requirements.
6.How does Aetrix verify that MC78FC30HT1 is sourced from the original manufacturer or authorized distributors?
All MC78FC30HT1 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 MC78FC30HT1 meets industry standards.
7.What is the process for return or replacement of MC78FC30HT1?
All MC78FC30HT1 units undergo pre-shipment inspection (PSI). If there is an issue with MC78FC30HT1, 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 MC78FC30HT1 part is unused and in its original packaging.
Return procedure for MC78FC30HT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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