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onsemi NCP7805TG
- Part No.:
- NCP7805TG
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
NCP7805TG.pdf
- Description:
- IC REG LINEAR 5V 1A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
NCP7805TG from onsemi is a 3-pin, fixed-output, positive linear voltage regulator delivering 5.0 V ±4% at up to 1.0 A continuous output current. It features internal thermal shutdown, short-circuit current limiting, safe-area compensation, and enhanced ESD protection (HBM 4 kV). It is used in industrial power supplies, embedded control modules, and legacy 5 V rail regulation where ruggedness and no-external-component operation are required.
For engineers reviewing the NCP7805TG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (2.0 V at 1.0 A), ripple rejection (62–75 dB), quiescent current (3.0–8.0 mA), thermal resistance (RJA = 65°C/W), and TO-220 package compatibility with standard heatsinking.
Technical Context
The NCP7805TG implements a monolithic series pass transistor with built-in safe-area compensation to prevent secondary breakdown under overload. Its thermal shutdown activates at 150°C junction temperature and recovers autonomously after cooldown.
Line regulation is specified at 1.1 mV (typ.) over 7.5–20 V input range; load regulation is 1.5 mV (typ.) across 5 mA–1.0 A output current. Dropout voltage remains fixed at 2.0 V (typ.) at full 1.0 A load and 25°C, independent of input ripple amplitude.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±4% (4.75–5.25 V over full load/temperature range); enables stable 5 V logic and analog supply without trimming. |
| Max Output Current | 1.0 A continuous (15 W max dissipation with heatsink); supports microcontroller, sensor, and peripheral power rails. |
| Dropout Voltage | 2.0 V (typ.) at 1.0 A, 25°C; requires minimum 7.0 V input for regulated 5 V output under worst-case conditions. |
| Ripple Rejection | 62–75 dB at 120 Hz; suppresses AC line noise from unregulated DC inputs like rectified wall adapters. |
| Quiescent Current | 3.0–8.0 mA (typ.–max); low standby draw suitable for always-on industrial monitoring systems. |
| ESD Rating | HBM 4 kV, MM 400 V; robust handling during PCB assembly and field service without external protection. |
| Thermal Resistance | RJA = 65°C/W (TO-220, no heatsink); RJC = 7.5°C/W; enables thermal design with standard clip-on heatsinks. |
Pinout & Package
Package: TO-220-3 (Case 221AB), Pb-free, through-hole mounting with heatsink surface connected to Pin 2 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Positive Power Supply Input | Accepts 7.0–35 V unregulated DC; must exceed Vout + 2.0 V to maintain regulation under ripple. |
| 2 (GND) | Power Supply Ground / Device Substrate | Common reference for input and output; electrically tied to heatsink mounting surface; requires low-impedance ground plane. |
| 3 (Vout) | Regulated Output Voltage | Delivers stable 5.0 V ±4%; output capacitor (≥0.1 µF) improves transient response but not required for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained regulation with internal pass element, feedback, and protection-reduces BOM count and layout area. |
| Internal thermal overload protection | Shuts down at 150°C junction temperature and auto-recovers; eliminates need for external thermal cutoff circuitry. |
| Safe-area compensated output transistor | Prevents secondary breakdown during short-circuit or high-Vin−Vout transients; enhances reliability in industrial environments. |
| Enhanced ESD tolerance | HBM 4 kV (5 V variant) meets IEC 61000-4-2 Level 3 for system-level ESD immunity without added TVS diodes. |
| Pb-free TO-220 package | RoHS-compliant lead finish and solderable terminations compatible with standard wave and reflow processes. |
Applications
| Industrial Power Supply | Embedded Control Module |
|---|---|
Use Scenario: Regulating 5 V rail from rectified 12 VAC transformer output in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Primary linear regulator providing clean, low-noise 5 V for microcontroller, I/O drivers, and analog front-end. Use Value: Internal short-circuit and thermal protection eliminate risk of cascade failure during field wiring faults or ambient temperature spikes. | Use Scenario: Powering ARM Cortex-M4-based motor control board operating in factory automation cabinets. IC Role / Device Role / Timing Role: Fixed 5 V supply for MCU core, CAN transceiver, and isolated gate drivers. Use Value: 62–75 dB ripple rejection ensures stable operation despite switching noise from nearby inverters and contactors. |
| Legacy System Replacement | Test & Measurement Equipment |
Use Scenario: Drop-in replacement for obsolete MC7805 in maintenance spares for aging medical diagnostic instruments. IC Role / Device Role / Timing Role: Direct functional and pin-compatible upgrade delivering identical 5 V output with improved ESD robustness. Use Value: Same TO-220 footprint and electrical interface enable zero-layout-change field upgrades without requalification. | Use Scenario: Providing precision 5 V bias for op-amp signal conditioning stages in portable multimeters. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source minimizing offset error in analog measurement paths. Use Value: 0.13 mV/°C tempco and 6.8 µV/V output noise preserve measurement accuracy across 0–50°C operating range. |
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 |
|---|---|---|---|
| MC7805CD2TR4G | Same 5 V output, TO-220 package, but lower ESD rating (HBM 2 kV) and no safe-area compensation. | Lacks thermal foldback and robust short-circuit survival under high differential voltage stress. | Select when cost sensitivity outweighs field reliability requirements in benign environments. |
| LM7805CT | Legacy National Semiconductor part; identical pinout but higher quiescent current (5.5–8.0 mA typ.) and no Pb-free marking. | Not qualified for modern RoHS production; limited traceability and lifecycle support. | Use only for legacy repair; avoid for new designs due to obsolescence and compliance risks. |
Compared with MC7805CD2TR4G and LM7805CT, the NCP7805TG provides superior thermal resilience, higher ESD immunity, and guaranteed Pb-free compliance-making it the preferred choice for industrial OEMs requiring long-term supply continuity and field reliability.
Availability
NCP7805TG is available at Aetrix Electronics and suitable for industrial power supplies, embedded control modules, and legacy system replacements requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for NCP7805TG 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The NCP7800 series was designed as a ruggedized, drop-in replacement for the MC7800 family-targeting industrial control, instrumentation, and legacy system maintenance where reliability, thermal resilience, and ESD robustness are critical.
FAQ
What is the minimum input voltage required for stable operation of the NCP7805TG?
The NCP7805TG requires a minimum input voltage of 7.0 V under all operating conditions, or Vout + VDO (5.0 V + 2.0 V), whichever is greater. This ensures regulation is maintained even at the lowest point of input ripple, as confirmed in Table 4 of the datasheet. Below 7.0 V, the NCP7805TG enters dropout and output voltage drops linearly with input.
Does the NCP7805TG require input or output capacitors for stability?
The NCP7805TG does not require an output capacitor for stability, though a ≥0.1 µF ceramic or tantalum capacitor improves transient response. An input capacitor (≥0.33 µF) is recommended if the regulator is located more than a few inches from the main power filter to suppress high-frequency noise and ensure stable operation under dynamic load changes, per Figure 1 and Application Information section.
Can the NCP7805TG be used in adjustable-voltage configurations?
Yes-the NCP7805TG can be configured as an adjustable regulator using an external op-amp feedback network, as shown in Figure 10 of the datasheet. However, the minimum output voltage achievable is 7.0 V (5.0 V + 2.0 V headroom), and the NCP7805TG itself remains fixed at 5.0 V; it serves only as the reference and pass element in such circuits-not as a standalone adjustable device.
What is the thermal shutdown behavior of the NCP7805TG?
The NCP7805TG activates thermal shutdown at 150°C junction temperature (TJ(max)), halting output current until junction temperature falls below the hysteresis threshold (~135°C). Recovery is fully autonomous with no latch-up or manual reset required. This behavior is verified in Absolute Maximum Ratings (Table 2) and Thermal Characteristics (Table 3), and applies across the full −65°C to +150°C storage range.
Is the NCP7805TG pin-compatible with the legacy MC7805?
Yes-the NCP7805TG is explicitly designed as a direct replacement for the MC7805, sharing identical TO-220-3 pinout (Pin 1: Vin, Pin 2: GND, Pin 3: Vout), same voltage/current specifications, and mechanical footprint. Datasheet Section 1 states "Designed as direct replacements for the popular MC7800 family," and ordering information confirms identical package and marking conventions.
NCP7805TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- 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 (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 8 mA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
NCP7805TG FAQ
1.How can I place an order for NCP7805TG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP7805TG 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 NCP7805TG reliable?
The price and inventory of NCP7805TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP7805TG is usually 5 days.
3.What payment methods are accepted for NCP7805TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP7805TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP7805TG?
NCP7805TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP7805TG 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 NCP7805TG?
For technical support, including NCP7805TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP7805TG requirements.
6.How does Aetrix verify that NCP7805TG is sourced from the original manufacturer or authorized distributors?
All NCP7805TG 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 NCP7805TG meets industry standards.
7.What is the process for return or replacement of NCP7805TG?
All NCP7805TG units undergo pre-shipment inspection (PSI). If there is an issue with NCP7805TG, 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 NCP7805TG part is unused and in its original packaging.
Return procedure for NCP7805TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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