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Renesas HA178L12UA-TL-E
- Part No.:
- HA178L12UA-TL-E
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
HA178L12UA-TL-E.pdf
- Description:
- IC REG LINEAR FIXED STNDRD REG
- Quantity:
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Inventory:13,105
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Product details
Overview
HA178L12UA-TL-E from Renesas is a three-terminal fixed-output linear voltage regulator delivering 12 V ±5% at up to 150 mA, featuring internal overcurrent and thermal protection, 800 mW power dissipation capability, and UPAK (SC-62) surface-mount package. It serves as a stable local power source for low-power analog and digital circuitry in industrial control modules and sensor interfaces.
For engineers reviewing the HA178L12UA-TL-E datasheet, HA178L12UA-TL-E pinout, HA178L12UA-TL-E application, or HA178L12UA-TL-E equivalent, key selection criteria include dropout voltage (1.7 V), ripple rejection (52 dB at 120 Hz), load regulation (≤50 mV), and operating ambient temperature range (–40°C to +85°C).
Technical Context
The HA178L12UA-TL-E implements a classic series-pass regulator architecture with an internal 2.5 V reference, error amplifier, and protection circuitry. Its thermal shutdown activates when junction temperature exceeds safe limits, and current limiting engages during output overload - both functions are fully integrated and require no external components.
Designed for simplicity and reliability, it operates without external compensation and supports standard input bypass (0.33 μF) and output decoupling (0.1 μF). Input voltage range spans 14.5 V to 27 V under specified load conditions, with dropout defined at 1.7 V at Tj = 25°C and IOUT = 40 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12 V ±5% - ensures stable rail for logic-level peripherals and op-amp biasing within commercial-grade tolerance. |
| Max Output Current | 150 mA - sufficient to power small microcontrollers, sensors, or interface ICs without external pass devices. |
| Dropout Voltage | 1.7 V - enables operation from 13.7 V minimum input in full-load condition, supporting 15 V bus-derived supplies. |
| Ripple Rejection | 52 dB at 120 Hz - suppresses rectified AC noise in offline power supplies feeding downstream analog stages. |
| Load Regulation | ≤50 mV (1–40 mA) - maintains voltage stability across varying load currents typical of intermittent-sensing circuits. |
| Quiescent Current | 3.1–6.5 mA - low enough for battery-backed subsystems while enabling fast startup and regulation response. |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient environments without derating below 85°C. |
Pinout & Package
HA178L12UA-TL-E uses the UPAK (SC-62) surface-mount package: 4.5 mm × 2.5 mm × 0.75 mm body, 3-pin configuration with gull-wing leads, 0.65 mm pitch, and 0.050 g typical mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated Output | Delivers stabilized 12 V; requires 0.1 μF ceramic capacitor to ground for stability and transient response. |
| 2 (GND) | Ground Reference | Common return path for internal error amp and protection circuits; must be low-impedance connection. |
| 3 (IN) | Unregulated Input | Accepts 14.5–27 V DC; requires 0.33 μF ceramic capacitor to ground near pin for high-frequency noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Thermal Protection | Automatic shutdown above safe junction temperature prevents permanent damage during sustained overload or poor heatsinking. |
| Overcurrent Limiting | Current foldback reduces output current during short-circuit events, limiting power dissipation and enabling safe recovery. |
| Low Quiescent Current Drift | ΔIQ ≤ 0.2 mA over 1–40 mA load range ensures predictable standby power in always-on monitoring nodes. |
| Stable with Ceramic Capacitors | No ESR requirements on COUT - compatible with low-ESR MLCCs, reducing board space and cost vs. tantalum alternatives. |
| Input Voltage Range Margin | Supports 27 V max input - accommodates transient surges on 24 V industrial buses without external clamping. |
Applications
| Industrial Sensor Interface | Microcontroller Power Rail |
|---|---|
Use Scenario: Powering analog-output temperature/humidity sensors and signal-conditioning amplifiers in factory-floor PLC I/O modules. IC Role / Device Role / Timing Role: Local 12 V regulator supplying clean, stable bias to precision op-amps and ADC drivers. Use Value: Maintains <±50 mV load regulation across sensor self-heating cycles, ensuring measurement repeatability within 0.1% FS. | Use Scenario: Providing regulated 12 V to legacy 8-bit MCUs (e.g., RL78/G10) in HVAC control panels with limited PCB area. IC Role / Device Role / Timing Role: Primary voltage source for MCU core and peripheral domains where switching noise must be avoided. Use Value: 52 dB ripple rejection eliminates 120 Hz hum coupling into reset and clock circuits, preventing spurious resets. |
| Programmable Logic Controller (PLC) Auxiliary Supply | Industrial Display Backlight Driver Bias |
Use Scenario: Generating isolated 12 V rail for optocoupler input stages and relay driver ICs in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Secondary regulator fed from main 24 V bus, delivering fault-isolated power to interface circuitry. Use Value: Integrated overcurrent and thermal protection eliminate need for discrete fuses or thermal cutoffs, simplifying BOM and certification. | Use Scenario: Biasing constant-current LED driver ICs (e.g., AL8861) in operator panel displays exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Stable 12 V supply enabling precise current setting in analog dimming paths. Use Value: –0.3 mV/°C temperature coefficient minimizes LED brightness drift over –40°C to +85°C operating range. |
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 |
|---|---|---|---|
| TL78L12ACZ | TO-92 through-hole package; 100 mA max output; ±4% tolerance; 700 mW PD; no thermal shutdown. | Suitable only for low-power, non-critical, manually assembled prototypes - lacks protection and SMT compatibility. | Select TL78L12ACZ only if through-hole assembly and lower cost outweigh need for reliability and modern packaging. |
| MC78L12CP | TO-92 package; 100 mA max output; ±5% tolerance; 600 mW PD; includes thermal shutdown but no current limiting. | Acceptable for low-current, thermally well-managed designs where short-circuit exposure is negligible. | Choose MC78L12CP only when legacy TO-92 footprint is mandatory and 150 mA capability is not required. |
Compared with TL78L12ACZ and MC78L12CP, HA178L12UA-TL-E provides higher output current (150 mA), greater power dissipation (800 mW), SMT-ready UPAK packaging, and dual overcurrent + thermal protection - making it the only option qualified for automated industrial production with robust fault handling.
Availability
HA178L12UA-TL-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC auxiliary supplies, microcontroller power rails, and display backlight biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for HA178L12UA-TL-E 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
Renesas Electronics Corporation is a global semiconductor manufacturer specializing in microcontrollers, analog and power devices, and SoC solutions for automotive, industrial, and infrastructure markets.
The HA178L00 Series was developed as a family of cost-effective, protected 3-terminal linear regulators targeting commercial and industrial applications where simplicity, reliability, and SMT compatibility are essential.
FAQ
What is the maximum input voltage rating for HA178L12UA-TL-E?
The absolute maximum input voltage for HA178L12UA-TL-E is 35 V, as specified in the Absolute Maximum Ratings table. However, for reliable continuous operation under full load (150 mA), the recommended maximum input is 27 V per the Electrical Characteristics test conditions - exceeding this risks thermal overload due to power dissipation limits in the UPAK package.
Does HA178L12UA-TL-E require external capacitors, and what values are recommended?
Yes, HA178L12UA-TL-E requires two external capacitors: a 0.33 μF ceramic capacitor between IN and GND, and a 0.1 μF ceramic capacitor between OUT and GND. These values are validated in the Standard Circuit diagram and Electrical Characteristics test setup; using them ensures stability, transient response, and ripple rejection performance as specified in the datasheet for HA178L12UA-TL-E.
Is HA178L12UA-TL-E pin-compatible with other HA178LxxUA variants?
Yes, all HA178LxxUA variants (e.g., HA178L05UA-TL-E, HA178L08UA-TL-E, HA178L12UA-TL-E, HA178L15UA-TL-E) share identical UPAK package dimensions, pinout (OUT-GND-IN), and thermal pad layout. This allows direct substitution across output voltages without PCB redesign, provided input voltage and load requirements remain within each variant's specified operating range.
What protection features are built into HA178L12UA-TL-E?
HA178L12UA-TL-E integrates two independent protection circuits: overcurrent protection that limits output current during shorts or excessive loads, and a temperature protection circuit that disables the output when junction temperature exceeds safe thresholds. Both functions are fully internal - no external components or configuration are needed to enable these protections in HA178L12UA-TL-E.
Can HA178L12UA-TL-E be used in automotive applications?
No, HA178L12UA-TL-E is not qualified for automotive applications. The datasheet specifies its use for commercial and industrial applications only, with operating ambient temperature rated from –40°C to +85°C - below the AEC-Q100 Grade 2 (–40°C to +105°C) requirement. Renesas explicitly states that HA178L00 Series devices are not designed for safety-critical or automotive systems, and HA178L12UA-TL-E falls under this classification.
HA178L12UA-TL-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HA178L12UA-TL-E FAQ
1.How can I place an order for HA178L12UA-TL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HA178L12UA-TL-E 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 HA178L12UA-TL-E reliable?
The price and inventory of HA178L12UA-TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HA178L12UA-TL-E is usually 5 days.
3.What payment methods are accepted for HA178L12UA-TL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HA178L12UA-TL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HA178L12UA-TL-E?
HA178L12UA-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HA178L12UA-TL-E 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 HA178L12UA-TL-E?
For technical support, including HA178L12UA-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HA178L12UA-TL-E requirements.
6.How does Aetrix verify that HA178L12UA-TL-E is sourced from the original manufacturer or authorized distributors?
All HA178L12UA-TL-E 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 HA178L12UA-TL-E meets industry standards.
7.What is the process for return or replacement of HA178L12UA-TL-E?
All HA178L12UA-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with HA178L12UA-TL-E, 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 HA178L12UA-TL-E part is unused and in its original packaging.
Return procedure for HA178L12UA-TL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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