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Texas Instruments LM7805MPX/NOPB
- Part No.:
- LM7805MPX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
LM7805MPX/NOPB.pdf
- Description:
- IC REG LINEAR 5V 1.5A SOT223-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,207
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Product details
Overview
LM7805MPX/NOPB from Texas Instruments is a fixed-output +5 V, 1.5-A positive linear voltage regulator in TO-263 (DDPAK) package, featuring internal current limiting, thermal shutdown, and safe-area protection. It operates with input voltages up to 35 V and maintains ±2% output tolerance at 25°C - used for local regulation in industrial power supplies and motor driver bias rails.
For engineers reviewing the LM7805MPX/NOPB datasheet, LM7805MPX/NOPB pinout, LM7805MPX/NOPB application, or LM7805MPX/NOPB equivalent, key selection criteria include dropout voltage (2 V @ 1 A), junction-to-ambient thermal resistance (44.8°C/W in KTT package), ripple rejection (62–80 dB), quiescent current (8 mA), and compatibility with minimal external components (no mandatory output capacitor).
Technical Context
The LM7805MPX/NOPB implements a monolithic three-terminal series pass architecture with built-in current-limiting circuitry that clamps peak output current to 2.4 A and triggers thermal shutdown at 150°C. Its safe-area compensation prevents second breakdown during overload conditions.
Unlike switching regulators, it delivers low-noise DC output (40 µV RMS noise, 10 Hz–100 kHz) without requiring output capacitance for stability - though a 0.1-µF ceramic capacitor improves transient response. Input bypassing is only required if placed >6 inches from the supply filter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed +5.0 V, ±2% tolerance at TJ = 25°C - ensures stable logic-level rail for microcontrollers and analog circuitry. |
| Max Output Current | 1.5 A continuous - supports moderate-power loads like sensor signal chains and small motor drivers without external boost. |
| Dropout Voltage | 2 V at 1 A load - requires minimum 7.5 V input to maintain regulation, limiting use in ultra-low VIN applications. |
| Ripple Rejection | 62–80 dB at 120 Hz - suppresses AC line noise from unregulated DC supplies, critical for sensitive analog stages. |
| Thermal Shutdown | Activates at TJ = 150°C - protects against sustained overloads or insufficient heatsinking in enclosed industrial enclosures. |
| Quiescent Current | 8 mA typical - contributes <40 mW idle dissipation at 5 V, enabling low-power standby modes in always-on systems. |
| Noise Voltage | 40 µV RMS (10 Hz–100 kHz) - suitable for low-noise analog front-ends where switching regulator artifacts are unacceptable. |
Pinout & Package
LM7805MPX/NOPB uses the DDPAK/TO-263 (KTT) 3-pin surface-mount package with exposed thermal pad (tab). The tab is electrically connected to Pin 2 (Ground), enabling direct PCB copper pour attachment for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Unregulated DC input node | Accepts 7.5–35 V DC; must be decoupled with ≥0.22 µF capacitor if located >6" from bulk filter. |
| 2 (GND) | Reference and return path | Common ground for input/output circuits; tab connection enables low-impedance thermal and electrical grounding. |
| 3 (OUTPUT) | Regulated +5 V output | Delivers stable 5 V to load; optional 0.1 µF ceramic capacitor improves step-load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Thermal Shutdown | Automatic recovery after cooldown - eliminates need for external thermal monitoring in fanless industrial designs. |
| Short-Circuit Protection | Limits peak current to 2.4 A - prevents catastrophic failure during wiring faults or output shorts in field-deployed equipment. |
| No Output Capacitor Required | Stable operation without output capacitance - reduces BOM count and board space in cost-sensitive consumer and industrial modules. |
| Low Noise Performance | 40 µV RMS output noise - avoids post-regulation filtering in audio preamps, precision ADC references, and sensor interfaces. |
| Wide Input Range | Supports 7.5–35 V DC input - accommodates variable-input sources like automotive batteries (with transient clamping) and rectified AC rails. |
Applications
| Industrial Power Supplies | SMPS Post-Regulation |
|---|---|
Use Scenario: Local 5 V rail generation on PLC I/O modules powered from 24 VDC bus. IC Role / Device Role / Timing Role: Fixed-voltage linear regulator providing clean, low-noise supply for digital isolators and analog sensor conditioners. Use Value: Eliminates distribution noise from shared 24 V bus while maintaining ±2% accuracy across −40°C to +125°C operating range. |
Use Scenario: Final-stage regulation after 12 V flyback converter in test equipment power tree. IC Role / Device Role / Timing Role: Low-noise post-regulator stabilizing 5 V for FPGA configuration memory and clock buffers. Use Value: 80 dB ripple rejection suppresses high-frequency switching artifacts from upstream SMPS, preventing timing jitter in clock domains. |
| HVAC Control Systems | Brushed DC Motor Drivers |
Use Scenario: Powering microcontroller, display, and temperature sensors in wall-mounted thermostats. IC Role / Device Role / Timing Role: Primary 5 V regulator sourcing logic and interface circuitry from battery or 24 V HVAC bus. Use Value: Thermal shutdown and current limiting ensure reliability during extended operation in sealed, thermally constrained enclosures. |
Use Scenario: Bias supply for H-bridge gate drivers and current-sense amplifiers in window lift controllers. IC Role / Device Role / Timing Role: Dedicated 5 V rail isolating control logic from noisy motor commutation transients. Use Value: 40 µV noise floor prevents false triggering of current-sense comparators during PWM transitions. |
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 |
|---|---|---|---|
| LM7805CT/NOPB | TO-220 through-hole package; RθJA = 54°C/W vs. 44.8°C/W for LM7805MPX/NOPB - higher thermal resistance limits power handling without heatsink. | Better suited for prototyping, manual assembly, or legacy through-hole PCBs; less optimal for high-density SMT production. | Select when mechanical mounting constraints favor vertical heatsink attachment or hand-soldering is required. |
| MC7805CD2TR4G | ON Semiconductor variant; same pinout and electrical specs, but specified for −40°C to +125°C (vs. TI's −40°C to +125°C); RθJA = 62.1°C/W in D2PAK. | Validated for extended temperature automotive body electronics; slightly lower thermal performance than KTT package. | Choose for AEC-Q100-aligned designs where dual-sourcing or specific qualification history is mandated. |
Compared with LM7805CT/NOPB and MC7805CD2TR4G, the LM7805MPX/NOPB offers superior thermal performance in surface-mount form factor - enabling higher ambient temperature operation in compact industrial modules without added heatsink area.
Availability
LM7805MPX/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, HVAC control systems, and brushed DC motor drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM7805MPX/NOPB 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM7805MPX/NOPB belongs to TI's legacy LM78xx family of fixed-voltage linear regulators - designed for robust, low-complexity local regulation in cost-sensitive and thermally demanding applications where simplicity and reliability outweigh efficiency concerns.
FAQ
What is the maximum input voltage rating for LM7805MPX/NOPB?
The absolute maximum DC input voltage for LM7805MPX/NOPB is 35 V, per TI's SNOSBT0L datasheet. However, for reliable operation with full 1.5-A output capability, the recommended input voltage range is 7.5 V to 25 V - exceeding this upper limit increases power dissipation and thermal stress, especially without adequate heatsinking.
Does LM7805MPX/NOPB require an output capacitor to remain stable?
No, LM7805MPX/NOPB does not require an output capacitor for stability - its internal compensation ensures unconditional stability. However, a 0.1-µF ceramic capacitor placed close to the OUTPUT pin significantly improves transient response during load steps, which is recommended for microcontroller or sensor applications.
What is the thermal resistance (RθJA) of LM7805MPX/NOPB in its KTT package?
The junction-to-ambient thermal resistance (RθJA) for LM7805MPX/NOPB in the DDPAK/TO-263 (KTT) package is 44.8°C/W, measured with standard JEDEC 2S2P test board conditions. Actual thermal performance improves with increased PCB copper area connected to the exposed tab - e.g., 1 in² copper reduces RθJA to ~37°C/W.
Can LM7805MPX/NOPB be used in adjustable-voltage configurations?
Yes, LM7805MPX/NOPB can be configured for adjustable output using external resistors and a reference diode, as shown in Figure 21 of the SNOSBT0L datasheet. Though optimized for fixed 5-V operation, its internal architecture supports such modifications - however, accuracy and regulation performance degrade compared to dedicated adjustable regulators like LM317.
How does the short-circuit protection behave in LM7805MPX/NOPB?
LM7805MPX/NOPB features foldback current limiting: under short-circuit, output current drops to ~200–300 mA after initial 2.4-A peak, reducing power dissipation and enabling indefinite survival at ambient temperatures ≤70°C without heatsink - verified in TI's thermal characterization data.
LM7805MPX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 8 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-4
LM7805MPX/NOPB FAQ
1.How can I place an order for LM7805MPX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM7805MPX/NOPB 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 LM7805MPX/NOPB reliable?
The price and inventory of LM7805MPX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM7805MPX/NOPB is usually 5 days.
3.What payment methods are accepted for LM7805MPX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM7805MPX/NOPB transactions.
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4.How is shipping managed for LM7805MPX/NOPB?
LM7805MPX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM7805MPX/NOPB 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 LM7805MPX/NOPB?
For technical support, including LM7805MPX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM7805MPX/NOPB requirements.
6.How does Aetrix verify that LM7805MPX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM7805MPX/NOPB 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 LM7805MPX/NOPB meets industry standards.
7.What is the process for return or replacement of LM7805MPX/NOPB?
All LM7805MPX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM7805MPX/NOPB, 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 LM7805MPX/NOPB part is unused and in its original packaging.
Return procedure for LM7805MPX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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