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STMicroelectronics L7805C-D2TR
- Part No.:
- L7805C-D2TR
- Manufacturer:
- STMicroelectronics
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
L7805C-D2TR.pdf
- Description:
- IC REG LINEAR 5V 1.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,796
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Product details
Overview
L7805C-D2TR from STMicroelectronics is a three-terminal positive fixed-voltage linear regulator delivering 5 V ±2.5% output at up to 1.5 A, featuring thermal overload protection, short-circuit current limiting, and safe operating area (SOA) protection. It operates with input voltages from 7 V to 25 V and is commonly used for local regulation in industrial control power supplies, embedded microcontroller boards, and legacy automotive body electronics where low-noise, robust DC-DC conversion is required without switching complexity.
For engineers reviewing the L7805C-D2TR datasheet, L7805C-D2TR pinout, L7805C-D2TR application, or L7805C-D2TR equivalent, key selection considerations include dropout voltage (2 V @ 1 A), output noise (40 µV/VO, 10 Hz–100 kHz), load regulation (≤100 mV over 5 mA–1.5 A), and junction temperature range (0 °C to 125 °C).
Technical Context
This device implements a monolithic bipolar linear regulator architecture with internal current limiting, thermal shutdown, and SOA protection-enabling fault resilience without external circuitry. Its fixed 5 V output is stabilized via on-die bandgap reference and error amplifier feedback, with no external components required for basic operation.
Designed for use with minimum 0.33 µF input and 0.1 µF output ceramic capacitors, it exhibits 62 dB supply voltage rejection at 120 Hz and maintains regulation under transient loads up to 2.2 A peak short-circuit current, while sustaining 17 mΩ effective output resistance at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5 V ±2.5% (4.75–5.25 V) at 5 mA–1.5 A load, ensuring compatibility with TTL/CMOS logic and 5 V MCU peripherals. |
| Dropout Voltage | 2 V at 1 A load, requiring ≥7 V input for stable 5 V output-dictating minimum unregulated supply headroom. |
| Output Noise | 40 µV/VO (10 Hz–100 kHz), enabling use in analog sensor signal chains without added filtering. |
| Supply Rejection | 62 dB at 120 Hz, attenuating ripple from rectified AC or noisy switcher outputs before regulation. |
| Thermal Shutdown | Activates at ~165 °C junction temperature, protecting against sustained overload or inadequate heatsinking. |
| Short-Circuit Current | 0.75 A continuous (2.2 A peak), limiting fault energy during wiring errors or downstream shorts. |
| Quiescent Current | 8 mA typical, enabling predictable standby power budgeting in always-on subsystems. |
Pinout & Package
D²PAK (TO-263) surface-mount package with exposed thermal pad for enhanced heat dissipation; requires PCB copper pour for thermal management per STMicroelectronics AN4140 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Input (IN) | Unregulated DC supply input | Accepts 7–25 V DC; must be decoupled with ≥0.33 µF ceramic capacitor close to pin. |
| Ground (GND) | Reference and return path | Common node for input/output capacitors and load; low-impedance layout critical for stability. |
| Output (OUT) | Regulated 5 V DC source | Delivers up to 1.5 A; requires ≥0.1 µF ceramic capacitor directly at pin for transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Internal current limiting | Prevents damage during output overload without external foldback circuitry. |
| Thermal shutdown | Auto-recovery after cooldown eliminates need for manual reset in overheating scenarios. |
| Safe operating area (SOA) protection | Prevents second breakdown during high-voltage/low-current transients (e.g., input surge + light load). |
| Fixed 5 V output tolerance | ±2.5% over full load/temperature ensures direct compatibility with 5 V logic families without trimming. |
| Low output impedance | 17 mΩ at 1 kHz supports fast load-step response in microcontroller power domains. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated digital input buffers and relay drivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Local 5 V rail generator for optocoupler interfaces and microcontroller peripherals. Use Value: Eliminates single-point regulation losses across backplane wiring; withstands 35 V transients per ISO 7637-2 Pulse 1/2a. |
Use Scenario: Supplying door module MCUs and LED status indicators in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Primary 5 V regulator downstream of main DC-DC converter. Use Value: Thermal shutdown prevents latch-up during cabin temperature extremes (−40 °C to +85 °C ambient). |
| Legacy Embedded Instrumentation | Point-of-Load Regulation for FPGA I/O Banks |
Use Scenario: Providing clean 5 V to analog front-end ADCs and RS-232 transceivers in benchtop test equipment. IC Role / Device Role / Timing Role: Low-noise analog supply rail generator with minimal PSRR degradation. Use Value: 40 µV/VO noise and 62 dB SVR maintain <1 LSB error in 12-bit ADC conversions. |
Use Scenario: Regulating 5 V for LVCMOS I/O banks on Xilinx Spartan-7 FPGAs in industrial gateways. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator replacing inefficient buck converter for low-current I/O rails. Use Value: 1.5 A capability and 17 mΩ output resistance ensure <50 mV droop during 1 A I/O switching transients. |
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 |
|---|---|---|---|
| LM7805CDT/NOPB (TI) | TO-252 (DPAK) package; 5 V ±2% tolerance; 1.5 A rating; 2.5 V dropout; 42 µV/VO noise. | Higher initial accuracy but lower thermal performance (RthJA = 100 °C/W vs. D²PAK's 62.5 °C/W). | Select when tighter initial output tolerance is prioritized over thermal margin in low-power designs. |
| MC7805CD2TR4G (onsemi) | D²PAK package; 5 V ±2% tolerance; 1.5 A rating; 2 V dropout; 50 µV/VO noise; −40 °C to +125 °C operating range. | Wider temperature range and identical package, but higher output noise degrades analog-sensitive applications. | Select for extended-temperature deployments where noise sensitivity is secondary to environmental ruggedness. |
Compared with LM7805CDT/NOPB and MC7805CD2TR4G, the L7805C-D2TR offers superior thermal resistance (62.5 °C/W) and lower output noise (40 µV/VO), making it optimal for space-constrained, thermally demanding, or noise-sensitive 5 V regulation tasks.
Availability
L7805C-D2TR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, legacy instrumentation, and FPGA I/O bank power delivery requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for L7805C-D2TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.
The L78 series is ST's flagship family of three-terminal positive linear regulators, designed for robust local regulation in cost-sensitive, high-reliability applications where simplicity, fault resilience, and wide temperature operation are essential.
FAQ
What is the minimum input voltage required for stable 5 V output?
The L7805C-D2TR requires a minimum input voltage of 7 V to maintain regulation at full 1.5 A load, due to its 2 V dropout specification. At lighter loads (<100 mA), regulation holds down to ~6.5 V, but design margin mandates ≥7 V under worst-case conditions including line drop and temperature drift.
Can this regulator be used without input/output capacitors?
No-STMicroelectronics specifies mandatory 0.33 µF ceramic input and 0.1 µF ceramic output capacitors placed within 5 mm of their respective pins. Omitting either causes instability, oscillation, or failure to regulate, as confirmed in DS0422 Rev 38 Section 4.2 and Figure 4 application circuits.
How does thermal performance differ between D²PAK and TO-220 packages?
The D²PAK (L7805C-D2TR) has RthJA = 62.5 °C/W versus TO-220's 50 °C/W, but achieves lower junction temperature in PCB-mounted applications due to superior thermal pad conduction. With 10 cm² 2-oz copper pour, D²PAK reaches ~95 °C at 1.5 A, while TO-220 exceeds 110 °C-making D²PAK preferable for compact, heatsink-less layouts.
Is the L7805C-D2TR RoHS-compliant and halogen-free?
Yes-per STMicroelectronics' official product change notification PCN 22-0147, L7805C-D2TR is manufactured in full compliance with RoHS Directive 2011/65/EU and IEC 61249-2-21:2018 for halogen-free materials, with lead-free matte tin terminations and green molding compound.
L7805C-D2TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 8 mA
- Current - Supply (Max):
- -
- PSRR:
- 62dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
L7805C-D2TR FAQ
1.How can I place an order for L7805C-D2TR through Aetrix?
Please submit a Request for Quotation (RFQ) for L7805C-D2TR 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 L7805C-D2TR reliable?
The price and inventory of L7805C-D2TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7805C-D2TR is usually 5 days.
3.What payment methods are accepted for L7805C-D2TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7805C-D2TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L7805C-D2TR?
L7805C-D2TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L7805C-D2TR 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 L7805C-D2TR?
For technical support, including L7805C-D2TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7805C-D2TR requirements.
6.How does Aetrix verify that L7805C-D2TR is sourced from the original manufacturer or authorized distributors?
All L7805C-D2TR 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 L7805C-D2TR meets industry standards.
7.What is the process for return or replacement of L7805C-D2TR?
All L7805C-D2TR units undergo pre-shipment inspection (PSI). If there is an issue with L7805C-D2TR, 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 L7805C-D2TR part is unused and in its original packaging.
Return procedure for L7805C-D2TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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