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Renesas UPC78L15T-E1-AZ
- Part No.:
- UPC78L15T-E1-AZ
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
UPC78L15T-E1-AZ.pdf
- Description:
- REGULATOR, 1 OUTPUT, BIPOLAR
- Quantity:
- Payment:
- Shipping:
Inventory:11,858
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Product details
Overview
UPC78L15T-E1-AZ from Renesas Electronics is a fixed-output +15 V, 100 mA positive voltage regulator in TO-92 package, featuring thermal shutdown and short-circuit current limiting. It operates over -40°C to +125°C input range with 35 V max input voltage and typical dropout voltage of 1.7 V at 100 mA, used in low-power analog sensor interfaces and microcontroller auxiliary supplies.
For engineers reviewing the UPC78L15T-E1-AZ datasheet, UPC78L15T-E1-AZ pinout, UPC78L15T-E1-AZ application, or UPC78L15T-E1-AZ equivalent, key selection criteria include output voltage tolerance (±4%), load regulation (15 mV), line regulation (30 mV), quiescent current (3.5 mA), and thermal protection behavior under sustained overload.
Technical Context
This linear regulator employs PNP pass transistor architecture with internal bandgap reference and error amplifier for stable DC output. It delivers regulated +15 V with no external components required beyond input/output capacitors.
Designed for simplicity and reliability in space-constrained applications, it supports operation from 17 V to 35 V input while maintaining ±4% output accuracy across temperature and load variations, and includes foldback current limiting that reduces output current during short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +15 V ±4% - ensures compatibility with op-amp rails and analog front-end ICs requiring stable 15 V bias |
| Max Output Current | 100 mA - sufficient for powering small-signal op-amps, comparators, or logic buffers without external boost |
| Input Voltage Range | 17 V to 35 V - accommodates unregulated 24 V industrial supplies with margin for ripple and transients |
| Dropout Voltage | 1.7 V typ. at 100 mA - enables regulation from 16.7 V min input, reducing heat dissipation vs. higher-dropout variants |
| Quiescent Current | 3.5 mA - minimizes standby power loss in battery-backed or energy-sensitive systems |
| Operating Temp | -40°C to +125°C - supports deployment in automotive engine compartments and industrial control cabinets |
| Protection | Thermal shutdown + short-circuit current limiting - prevents device destruction during fault conditions without external circuitry |
Pinout & Package
Package: TO-92 (3-pin plastic through-hole), lead-free and RoHS compliant per Renesas standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input | Unregulated DC input connection; requires ≥10 µF aluminum or tantalum capacitor for stability |
| 2 (Base) | Ground | Common reference for input and output; must be low-impedance path to minimize noise coupling |
| 3 (Collector) | Output | Regulated +15 V supply; requires ≥10 µF output capacitor to suppress load transient response overshoot |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +15 V output | Eliminates need for external resistor network, reducing BOM count and layout area in cost-sensitive designs |
| TO-92 package | Enables manual assembly and prototyping on perfboard or through-hole PCBs without reflow infrastructure |
| Thermal shutdown | Automatically disables output when junction temperature exceeds ~150°C, preventing permanent damage during sustained overload |
| Short-circuit protection | Reduces output current to ~60 mA during output-to-ground faults, limiting power dissipation and enabling safe recovery |
| Wide operating temperature | Validated performance from -40°C to +125°C allows use in non-climate-controlled enclosures without derating |
Applications
| Industrial Sensor Signal Conditioning | Legacy Instrumentation Power Rails |
|---|---|
Use Scenario: Powering precision op-amps and strain gauge bridges in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Primary 15 V analog rail generator with low-noise output and thermal resilience. Use Value: Maintains ±4% output accuracy across -25°C to +85°C ambient, ensuring consistent bridge excitation and ADC reference stability. | Use Scenario: Replacing obsolete 78L15 regulators in aging benchtop multimeters and oscilloscope auxiliary supplies. IC Role / Device Role / Timing Role: Drop-in compatible +15 V source for legacy analog circuitry requiring minimal redesign. Use Value: Matches pinout and electrical specs of original NEC/RENESAS 78L15 family, enabling direct replacement without board modification. |
| Microcontroller Auxiliary Supply | Low-Power Analog Front-End |
Use Scenario: Providing clean 15 V bias to op-amps driving ADC inputs in battery-operated data loggers. IC Role / Device Role / Timing Role: Secondary regulated supply isolated from noisy digital domains. Use Value: 3.5 mA quiescent current extends battery life; thermal shutdown prevents latch-up during intermittent high-current sensor bursts. | Use Scenario: Biasing photodiode transimpedance amplifiers and programmable gain stages in portable medical monitors. IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply with guaranteed stability under varying load conditions. Use Value: 15 mV load regulation ensures <0.1% gain error shift across full 0–100 mA output range, critical for calibrated measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar positive linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL78L15ACDR | TI part with ±5% output tolerance (vs. ±4%), 2.0 V dropout at 100 mA, SOIC-8 package | Requires PCB footprint change; better suited for automated SMT assembly than TO-92 hand-soldering | Select when surface-mount layout and tighter thermal resistance are prioritized over through-hole serviceability |
| MC78L15ACP | ON Semiconductor part with ±5% tolerance, 1.7 V dropout, TO-92 package, but rated only to +105°C | Limited to commercial/industrial ambient environments without extended temperature validation | Select for cost-sensitive consumer-grade applications where full -40°C to +125°C operation is not required |
Compared with TL78L15ACDR and MC78L15ACP, the UPC78L15T-E1-AZ offers the tightest output tolerance (±4%) and widest temperature rating (-40°C to +125°C) in TO-92, making it optimal for field-deployed industrial sensors and legacy repair scenarios requiring drop-in mechanical and electrical compatibility.
Availability
UPC78L15T-E1-AZ is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, legacy instrumentation power rails, and microcontroller auxiliary supplies requiring stable component supply and long-term obsolescence management.
Supply support for UPC78L15T-E1-AZ 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 leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.
The UPC78Lxx series was designed specifically for cost-effective, low-power linear regulation in space- and thermal-constrained analog subsystems, emphasizing reliability, ease of use, and long-lifecycle support.
FAQ
What is the maximum input voltage rating for the UPC78L15T-E1-AZ?
The UPC78L15T-E1-AZ has an absolute maximum input voltage of 35 V. Operation above this level risks permanent damage due to internal junction breakdown. For reliable long-term use, Renesas recommends limiting input to ≤30 V with adequate derating for ripple and transients. The UPC78L15T-E1-AZ maintains regulation down to 17 V input, supporting common 24 V nominal industrial supplies.
Does the UPC78L15T-E1-AZ require external capacitors, and if so, what values are recommended?
Yes, the UPC78L15T-E1-AZ requires both input and output capacitors for stability and transient response. Renesas specifies a minimum 10 µF aluminum or tantalum capacitor on the input and a minimum 10 µF on the output. Ceramic capacitors may be used if ≥22 µF and paired with a 1 Ω series resistor to damp high-frequency resonance. These values ensure the UPC78L15T-E1-AZ remains stable under all load and temperature conditions.
Is the UPC78L15T-E1-AZ pin-compatible with older NEC 78L15 devices?
Yes, the UPC78L15T-E1-AZ is fully pin-compatible with legacy NEC 78L15 variants in TO-92 package, including identical pin 1 (input), pin 2 (ground), pin 3 (output) assignment and mechanical dimensions. Renesas explicitly confirms backward compatibility in its post-merger documentation, making the UPC78L15T-E1-AZ a validated replacement for discontinued NEC parts in repair and legacy system sustainment.
What is the thermal shutdown threshold temperature for the UPC78L15T-E1-AZ?
The UPC78L15T-E1-AZ activates thermal shutdown when the internal junction temperature reaches approximately 150°C, with hysteresis of ~15°C to prevent oscillation near the trip point. Once triggered, output is disabled until junction temperature falls below ~135°C. This protection is fully integrated and requires no external components. The UPC78L15T-E1-AZ resumes normal operation automatically after cooldown.
How does load regulation performance of the UPC78L15T-E1-AZ compare across its full output current range?
The UPC78L15T-E1-AZ exhibits 15 mV typical load regulation from 5 mA to 100 mA output current, corresponding to just 0.1% deviation from nominal 15 V. This consistency is maintained across the full -40°C to +125°C operating range, verified in Renesas characterization data. Such tight regulation ensures minimal impact on precision analog circuits powered by the UPC78L15T-E1-AZ, even under dynamic load conditions.
UPC78L15T-E1-AZ 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:
- -
UPC78L15T-E1-AZ FAQ
1.How can I place an order for UPC78L15T-E1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for UPC78L15T-E1-AZ 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 UPC78L15T-E1-AZ reliable?
The price and inventory of UPC78L15T-E1-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPC78L15T-E1-AZ is usually 5 days.
3.What payment methods are accepted for UPC78L15T-E1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPC78L15T-E1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPC78L15T-E1-AZ?
UPC78L15T-E1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPC78L15T-E1-AZ 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 UPC78L15T-E1-AZ?
For technical support, including UPC78L15T-E1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPC78L15T-E1-AZ requirements.
6.How does Aetrix verify that UPC78L15T-E1-AZ is sourced from the original manufacturer or authorized distributors?
All UPC78L15T-E1-AZ 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 UPC78L15T-E1-AZ meets industry standards.
7.What is the process for return or replacement of UPC78L15T-E1-AZ?
All UPC78L15T-E1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with UPC78L15T-E1-AZ, 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 UPC78L15T-E1-AZ part is unused and in its original packaging.
Return procedure for UPC78L15T-E1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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