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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators > NTE7239
NTE Electronics, Inc
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NTE7239

In Stock 11652 pcs Reference Price(In US Dollars)
1+
$7.0939
200+
$2.8314
500+
$2.7362
1000+
$2.69
Manufacturer Part Number:
NTE7239
Manufacturer / Brand
NTE Electronics, Inc
Part of Description:
IC REG LINEAR POS ADJ 5A TO220
Datasheets:
NTE7239(1).pdfNTE7239(2).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 11652 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number NTE7239
Manufacturer / Brand NTE Electronics, Inc
Stock Quantity 11652 pcs Stock
Category Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Description IC REG LINEAR POS ADJ 5A TO220
Lead Free Status / RoHS Status: ROHS3 Compliant
Voltage Dropout (Max) -
Voltage - Output (Min/Fixed) 1.2V
Voltage - Output (Max) 32V
Voltage - Input (Max) 40V
Supplier Device Package TO-220
Series -
Protection Features Over Current, Over Temperature, Short Circuit
Package / Case TO-220-3
Package Bag
PSRR 75dB ~ 60dB (120Hz)
Output Type Adjustable
Output Configuration Positive
Operating Temperature 0°C ~ 125°C
Number of Regulators 1
Mounting Type Through Hole
Current - Quiescent (Iq) 100 µA
Current - Output 5A
Control Features -

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

PayPal:

PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: PayPal@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

What are the key design constraints when using the NTE7239 linear voltage regulator in a high-input-voltage application near its 40V maximum?
When operating the NTE7239 near its 40V input limit, thermal management becomes critical due to high power dissipation (P = (Vin – Vout) × Iout). Even at moderate loads, junction temperature can exceed safe limits without adequate heatsinking. Additionally, input voltage transients or surges above 40V—common in industrial environments—can damage the device. A transient voltage suppressor (TVS) or input clamp circuit is recommended to protect the NTE7239 in such scenarios.
Can the NTE7239 be used as a drop-in replacement for the LM317 in existing TO-220 footprints?
The NTE7239 is functionally compatible with the LM317 in terms of pinout, package (TO-220-3), and adjustable output configuration, but it offers significantly higher output current capability (5A vs. 1.5A). However, verify that the input capacitor type and value match the NTE7239’s stability requirements, as improper bypassing may cause oscillation. Also, ensure the thermal design supports the increased power dissipation at higher currents.
What output voltage range can the NTE7239 reliably support, and are there limitations when setting very low output voltages?
The NTE7239 supports an adjustable output from 1.2V to 32V. However, at output voltages close to the 1.2V reference, the regulator’s dropout voltage (not explicitly specified but typically ~2V at full load) limits practical use. For outputs below ~2.5V, the input voltage must be tightly controlled to maintain regulation, and efficiency drops significantly. Consider a switching regulator for sub-2V outputs.
How does the NTE7239 behave under short-circuit conditions, and what protection features are active during fault events?
The NTE7239 includes built-in short-circuit protection that limits output current during a fault, reducing power dissipation and preventing immediate failure. Combined with over-temperature shutdown, this allows the device to survive prolonged short conditions if thermal mass or heatsinking prevents thermal runaway. However, repeated fault cycling without cooling may degrade long-term reliability.
Is the NTE7239 suitable for battery-powered systems requiring low quiescent current?
With a quiescent current of 100 µA, the NTE7239 is not ideal for ultra-low-power battery applications such as remote sensors or IoT devices where nanoamp-level sleep currents are common. While acceptable for moderate-duty-cycle systems, consider low-Iq LDOs (e.g., <10 µA) for extended battery life. The NTE7239 is better suited for industrial or line-powered systems where efficiency at high load current matters more than standby consumption.
What are the implications of using the NTE7239 in an environment with ambient temperatures approaching 125°C?
The NTE7239’s operating temperature range is rated up to 125°C junction temperature, but at high ambient temperatures (e.g., >85°C), derating is necessary. Power dissipation must be reduced to avoid thermal shutdown, requiring larger heatsinks or forced airflow. Long-term reliability may also be affected by thermal cycling; ensure the PCB layout and mounting method minimize mechanical stress on the TO-220 package.
Can the NTE7239 be paralleled to increase output current beyond 5A?
Paralleling multiple NTE7239 devices is not recommended without external current-sharing circuitry due to mismatches in output voltage setpoints and internal feedback loops. Even minor differences in reference voltage or resistor tolerances can cause one regulator to carry disproportionate current, leading to thermal imbalance and potential failure. For higher currents, consider a monolithic regulator rated for the required load or a switching topology.
What input and output capacitor values and types are required to ensure stability with the NTE7239?
The NTE7239 requires a low-ESR input capacitor (typically 0.33 µF ceramic or tantalum) placed close to the input pin to prevent oscillation. An output capacitor (usually 1 µF to 10 µF) improves transient response and stability, though the exact value depends on load characteristics. Avoid large electrolytic capacitors with high ESR unless compensated, as they can degrade phase margin.
How does the NTE7239 compare to modern switching regulators in terms of efficiency and thermal performance for a 12V-to-5V, 3A application?
In a 12V-to-5V, 3A application, the NTE7239 dissipates approximately 21W ((12V – 5V) × 3A), requiring a substantial heatsink and limiting efficiency to around 42%. A synchronous buck converter with >90% efficiency would dissipate less than 2W under the same conditions. The NTE7239 is only justified where low noise, simplicity, or fast transient response outweigh thermal and efficiency concerns.
Are there known compatibility issues when replacing an older 78xx-series fixed regulator with the adjustable NTE7239 in legacy designs?
Replacing a fixed 78xx regulator with the NTE7239 requires redesigning the feedback resistor network to set the desired output voltage, as the NTE7239 lacks internal voltage reference trimming. Additionally, the 78xx typically includes built-in output capacitors; verify that the NTE7239’s stability is maintained with the existing capacitor values. Input voltage must also remain above the NTE7239’s minimum dropout threshold to ensure regulation.

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