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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators > L7908CV-DG
STMicroelectronics
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L7908CV-DG

In Stock 25580 pcs Reference Price(In US Dollars)
1+
$0.2087
Manufacturer Part Number:
L7908CV-DG
Manufacturer / Brand
STMicroelectronics
Part of Description:
IC REG LINEAR -8V 1.5A TO220
Datasheets:
L7908CV-DG(1).pdfL7908CV-DG(2).pdfL7908CV-DG(3).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 25580 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number L7908CV-DG
Manufacturer / Brand STMicroelectronics
Stock Quantity 25580 pcs Stock
Category Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Description IC REG LINEAR -8V 1.5A TO220
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ L7908CV-DG Datasheets L7908CV-DG Details PDF
L7908CV-DG Details PDF for FR.pdf
L7908CV-DG Details PDF for KR.pdf
L7908CV-DG Details PDF for DE.pdf
L7908CV-DG Details PDF for ES.pdf
L7908CV-DG Details PDF for IT.pdf
Voltage Dropout (Max) 1.1V @ 1A (Typ)
Voltage - Output (Min/Fixed) -8V
Voltage - Output (Max) -
Voltage - Input (Max) -35V
Supplier Device Package TO-220
Series -
Protection Features Over Temperature, Short Circuit
Package / Case TO-220-3
Package Tube
PSRR 60dB (120Hz)
Output Type Fixed
Output Configuration Negative
Operating Temperature 0°C ~ 125°C
Number of Regulators 1
Mounting Type Through Hole
Current - Quiescent (Iq) 3 mA
Current - Output 1.5A
Control Features -
Base Product Number L7908

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

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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
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L7908CV-DG Product Details:

The STMicroelectronics L7908CV-DG is a high-performance linear voltage regulator designed to provide stable and reliable negative voltage regulation in electronic systems. As a precision Power Management Integrated Circuit (PMIC), this device offers a fixed -8V output with a robust 1.5A current capacity, making it ideal for applications requiring consistent negative voltage supply.

Engineered with advanced protection features, the L7908CV-DG incorporates built-in safeguards against over-temperature conditions and short circuits, ensuring enhanced circuit reliability and component longevity. The regulator operates effectively across a wide temperature range of 0°C to 125°C, demonstrating exceptional thermal stability and performance consistency.

The device utilizes a through-hole TO-220 package, which provides excellent heat dissipation and mechanical durability. Its negative output configuration makes it particularly suitable for specialized electronic circuits requiring negative voltage regulation. With a low dropout voltage of 1.1V at 1A and a remarkable Power Supply Rejection Ratio (PSRR) of 60dB, the regulator maintains exceptional output stability across varying input conditions.

Key advantages include its lead-free and RoHS-compliant design, low quiescent current of 3mA, and versatile input voltage tolerance up to -35V. These characteristics make the L7908CV-DG an excellent choice for automotive electronics, industrial control systems, telecommunications equipment, and precision instrumentation.

Compatible alternative models in the same family include the L7908C, L7908CV, and similar negative voltage regulators from STMicroelectronics' linear regulator series. The device's comprehensive protection mechanisms and reliable performance make it a preferred solution for engineers seeking robust negative voltage regulation.

Typical application areas encompass power supply design, signal conditioning, sensor circuits, voltage reference systems, and any electronic implementation requiring stable -8V power delivery with high current handling capabilities.

L7908CV-DG Image
L7908CV-DG (1)

L7908CV-DG Key Technical Attributes

- Negative Fixed Output Voltage Regulator

- Output: -8V, 1.5A

- Dropout Voltage: 1.1V @ 1A (Typ)

L7908CV-DG Packing Size

- Packaging Type: Tube

- Device Package: TO-220-3

- Material: Lead free, RoHS Compliant

- Thermal and Electrical Properties: Suitable for Operation at 0°C ~ 125°C

L7908CV-DG Application

- Ideal for linear voltage regulation needs in consumer electronics, industrial tools, and automotive electronics where robust negative voltage supply is required.

L7908CV-DG Features

- Features a fixed output voltage of -8V which allows steady performance across various loads.

- Delivers a steady output current up to 1.5A suitable for high power applications.

- Minimal dropout voltage of 1.1V at 1A typical ensures efficient operation even at near-full load conditions.

- High PSRR of 60dB at 120Hz helps in suppression of input voltage noise, thus enhancing the reliability and stability of voltage supply.

- Equipped with advanced safety features like Over Temperature Protection and Short Circuit Protection which enhance the operational lifespan and prevent damage from unusual operating conditions.

L7908CV-DG Quality and Safety Features

- Incorporates multiple protection features including Over Temperature and Short Circuit Protection.

- Compliant with RoHS, lead-free standards ensuring environmental friendliness and safety.

- Moisture Sensitivity Level (MSL) 1 (Unlimited), implying high tolerance to moisture during handling and mounting.

L7908CV-DG Compatibility

- Compatible with through-hole mounting technique which makes it suitable for varied PCB designs and styles.

- Negative output configuration accommodates a variety of electronic circuits requiring negative voltage inputs.

L7908CV-DG Datasheet PDF

- Visit our website for the most authoritative and comprehensive datasheet of L7908CV-DG.

- Ensure accuracy in specifications and application guidance by downloading the datasheet directly from the product page.

Quality Distributor

- IC-Components is a premier distributor for STMicroelectronics, guaranteeing genuine products and excellent service.

- Get a competitive quote and ensure the availability of L7908CV-DG by purchasing through our reliable distribution network at IC-Components.com.

Frequently Asked Questions

What are the typical input voltage derating requirements for the L7908CV-DG when operating near its -35V maximum input specification, especially in noisy environments?
When operating the L7908CV-DG close to its -35V maximum input voltage, it is crucial to consider the power dissipation and the thermal resistance of the TO-220 package. For environments with significant electrical noise, a conservative input voltage margin, typically 5-10V below the maximum, is recommended to ensure stable operation and prevent exceeding thermal limits, even with the integrated over-temperature protection of the L7908CV-DG.
How does the L7908CV-DG's PSRR of 60dB at 120Hz translate into practical implications for filtering noisy input supplies in sensitive analog circuits?
The L7908CV-DG's 60dB PSRR at 120Hz means it can significantly attenuate ripple and noise present on its input supply at that specific frequency. For applications requiring lower noise than this, especially at higher frequencies, additional external filtering components like capacitors and possibly inductors will be necessary in conjunction with the L7908CV-DG to achieve the desired output signal purity.
What are the key considerations and potential design risks when replacing a higher current 1.5A negative regulator, such as a specific competitor part, with the STMicroelectronics L7908CV-DG?
When replacing a 1.5A negative regulator with the L7908CV-DG, ensure the existing thermal management (heatsinking) is adequate for the L7908CV-DG's power dissipation. While both may be rated for 1.5A, variations in dropout voltage and internal thermal resistance can lead to different operating temperatures. Verify that the input voltage range of the L7908CV-DG (-35V max) is compatible with the existing design.
Can the L7908CV-DG be reliably used in an industrial control system with ambient temperatures fluctuating between -20°C and +70°C, considering its specified 0°C to 125°C operating range?
Yes, the L7908CV-DG is suitable for the specified industrial operating temperature range of -20°C to +70°C, as it falls well within its guaranteed operating limits of 0°C to 125°C. However, robust thermal management, including appropriate heatsinking, is still essential to ensure reliable long-term operation, especially at higher load currents within this range.
What are the specific limitations of the L7908CV-DG's short-circuit protection feature, and what precautions should be taken to avoid damage during testing or accidental shorts?
The L7908CV-DG features internal current limiting and thermal shutdown for short-circuit protection. While effective, sustained short circuits, especially at maximum input voltage and high temperatures, can still lead to device stress or failure. It is advisable to use current-limiting resistors or external fuses in series with the output during development and testing phases to mitigate risks associated with accidental shorts while using the L7908CV-DG.
If my existing design uses an L7908 in a TO-263 package, what are the critical thermal and footprint considerations when migrating to the TO-220 package of the L7908CV-DG?
Migrating from a TO-263 to a TO-220 package like the L7908CV-DG requires significant redesign. The TO-220 package typically has a higher thermal resistance than the surface-mount TO-263, necessitating a larger heatsink or more aggressive airflow for equivalent thermal performance. Footprint changes are also substantial, as the TO-220 is a through-hole component and will require different PCB mounting.
Are there any specific capacitor types or ESR (Equivalent Series Resistance) requirements recommended for the input and output bypass capacitors when using the L7908CV-DG to ensure stability and transient response?
For stable operation of the L7908CV-DG, it is recommended to use low ESR tantalum or ceramic capacitors for both input and output bypassing. A minimum input capacitance of 0.1µF and an output capacitance of at least 1µF are generally advised. Consult the datasheet for specific recommendations on capacitor placement and ESR values to optimize transient response and prevent oscillations.
When designing a power supply for a battery-operated portable device, what are the trade-offs of using a linear regulator like the L7908CV-DG versus a switching regulator, considering efficiency and battery life?
For portable devices, the L7908CV-DG, as a linear regulator, offers simplicity, low output noise, and inherent protection features but suffers from lower efficiency compared to switching regulators. This lower efficiency translates to higher power dissipation and reduced battery life, especially when there is a significant voltage drop across the regulator. Switching regulators are more efficient but introduce more output ripple and complexity.
What is the impact of the L7908CV-DG's 1.1V (typ) voltage dropout on the selection of the input voltage, especially in applications where the input voltage source can dip close to the required -8V output?
The 1.1V typical voltage dropout for the L7908CV-DG means that the input voltage must be at least 1.1V higher than the -8V output to maintain regulation. Therefore, in applications where the input voltage can dip close to -8V, careful selection of the input supply is critical. If the input voltage is expected to fall below -9.1V, the L7908CV-DG may not be able to provide a stable -8V output, and alternative solutions like a switching regulator or a different linear regulator with lower dropout may be required.
For a high-reliability embedded system requiring long-term operation, what are the best practices for heatsinking the L7908CV-DG in a TO-220 package to ensure it operates well below its thermal shutdown threshold?
To ensure long-term reliability of the L7908CV-DG, proper heatsinking is paramount. For continuous operation at or near its 1.5A output current, a heatsink with a thermal resistance of 5°C/W or lower is recommended, depending on the ambient temperature and airflow. Attaching the L7908CV-DG securely to the heatsink with thermal paste and a proper mounting mechanism is essential for effective heat transfer. Monitoring the device temperature during operation is also a good practice.

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