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NJM7805FA
NJM7805FA
| Part Number | NJM7805FA |
|---|---|
| Manufacturer | Nisshinbo Micro Devices (Formerly NJR / New Japan Radio) |
| Category | Integrated Circuits (ICs) > PMIC – Voltage Regulators – Linear |
| Description | Monolithic 3-terminal positive linear voltage regulator delivering a precise fixed 5V output and up to 1.5A output current, housed in an isolated TO-220F package featuring internal thermal shutdown and short-circuit protection. |
| Stock Status | In Stock |
| Origin | Original Factory Authentic Stock |
Product Overview
The NJM7805FA is a reliable industry-standard 3-terminal positive fixed linear regulator from Nisshinbo Micro Devices. It generates stable, low-noise 5V DC output and supports max 1.5A continuous output current with sufficient heat dissipation. Built-in multi-protection circuits include thermal shutdown, SOA safe operating area protection and short-circuit current limiting to avoid permanent damage under abnormal load faults. This model adopts fully molded isolated TO-220F full-pack packaging; the insulated tab eliminates extra mica insulating washers during heatsink assembly to cut production costs and simplify mounting workflows. It is widely used as standard power supply for MCU, digital logic circuits, sensors, analog signal processing and on-board fixed voltage regulation modules.
Core Advantages
Fully Isolated TO-220F Full-Pack Housing
The fully encapsulated plastic body insulates the internal die tab from external cooling heatsinks, removing extra insulating spacers and speeding up mass production assembly processes.
Robust Internal Fault Safeguards
Integrated thermal shutdown, SOA protection and short-circuit current limit, the chip automatically limits output current to protect the device from damage caused by overload or short circuit.
High Ripple Rejection and Low Noise
Excellent power supply ripple rejection performance and low output noise, ideal for powering noise-sensitive analog measuring equipment and high-speed digital logic circuits.
Universal Drop-In Pin Configuration
Complies with unified Input-Ground-Output pin definition of the 78xx series, supporting direct drop-in replacement for old linear regulator circuit designs.
Key Specifications
| Brand | Nisshinbo Micro Devices / NJR |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free Matte Tin Terminal Pins |
| EDA/CAD Model | 3D Model & PCB Footprint Available upon request |
| Warranty | 1-Year Standard Factory Warranty |
| Package / Case | TO-220F |
| Mounting Type | Through-Hole Technology (THT) |
| Surface Marking / Silkscreen | 7805A Marking |
| Output Voltage (VOUT) | 5.0 V Fixed Positive Output Target |
| Input Voltage (VIN) Limit | 35 V Absolute Maximum Input Voltage |
| Output Current (IOUT) Capacity | 1.5 A Maximum Capability (Dependent on proper junction thermal boundaries) |
| Dropout Voltage (Vd) | 2.0 V Typical (Minimum differential input-to-output voltage window) |
| Line Regulation | 3.0 mV Typical (at VIN = 7.0V to 25V) |
| Load Regulation | 15 mV Typical (at IOUT = 5mA to 1.5A) |
| Power Supply Ripple Rejection (PSRR) | 72 dB Typical (at f = 120Hz, VIN = 10V) |
| Operating Temperature Range | -40°C to +85°C wide industrial operating temperature range |
| Quiescent Current (IQ) | 5 mA Typical No-load Operating Current |
| Output Noise Voltage | 40 µV Typical (10Hz ~ 10kHz Test Bandwidth) |
| Thermal Resistance (RθJC) | 3.0 °C/W Junction to Tab Thermal Resistance |
| Thermal Resistance (RθJA) | 50 °C/W Junction to Ambient (No Heatsink) |
| Short-Circuit Current Limit | 2.5 A Typical Overcurrent Clamp Value |
| Storage Temperature Range (TSTG) | -55°C ~ +125°C |
Typical Applications
- Dedicated 5V Logic Power Rails for Microcontrollers (MCU), FPGAs, and Digital Logic Boards
- Industrial PLCs, Process Automation Interfaces, and Smart Industrial Sensor Networks
- On-Board Localized Sub-Regulation Blocks inside Automotive and Telecommunication Systems
- Test Instruments, Medical Monitoring Equipment, and High-Precision Electronic Scales
- Consumer Electronics, Home Appliances, Embedded System Development Boards, and Power Supply Post-Regulation Stages
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: Is your currently available stock of the NJM7805FA 100% genuine and original?
A: Yes, we guarantee that all NJM7805FA units in our inventory are 100% brand-new, original factory components from Nisshinbo Micro Devices (formerly NJR). Each shipping batch undergoes rigorous corporate inventory control and is managed strictly within ESD-shielded storage facilities.
Q2: Why does the manufacturer name state Nisshinbo Micro Devices instead of New Japan Radio (NJR)?
A: New Japan Radio (NJR) merged with Ricoh Electronic Devices to form Nisshinbo Micro Devices. Old batches may carry NJR marking, while internal die specifications, electrical parameters and pinout remain fully consistent.
Q3: Do I still need to use thermal compound when installing this isolated TO-220F package to a heatsink?
A: Yes. TO-220F full-pack package provides built-in electrical isolation so mica insulating washers are not required. A thin layer of thermal grease is still recommended to reduce contact thermal resistance between the tab and heatsink.
Q4: What is the optimal input voltage window to ensure standard continuous 5V output performance?
A: Minimum input voltage needs to reach 7.0V to overcome 2V dropout voltage. The absolute maximum input voltage is 35V, recommended nominal operating input range is 7.5V ~ 12V to lower heat generation and avoid thermal protection triggering.
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