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Home Products Integrated Circuits (ICs)Specialized ICs~~FT7421DQY~~

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FT7421DQY - FOCALTECH

Name: FOCALTECH FT7421DQY
Brand: FOCALTECH
SKU: FT7421DQY
Availability: InStock
Rating: 5 (2 reviews)

Manufacturer Part Number: FT7421DQY

Manufacturer: FOCALTECH

Allelco Part Number: 32D-FT7421DQY

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 4,290 pcs available, New & Original

Parts Description: DAC91001

Data sheet: -

Category: Integrated Circuits (ICs) > Specialized ICs

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In stock: 4290

Specifications

FT7421DQY Tech Specifications
FOCALTECH - FT7421DQY technical specifications, attributes, parameters and parts with similar specifications to FOCALTECH - FT7421DQY

Product Attribute	Attribute Value
Part Number	FT7421DQY
Package	DAC91001
Description	DAC91001
Stock Condition	Get 4290 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	FOCALTECH
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Frequently Asked Questions(FAQ)

How does the FT7421DQY compare to other voltage regulators in terms of quiescent current and efficiency at light loads, particularly for battery-powered applications?: The FT7421DQY features a low quiescent current of 35 µA typical, which is advantageous for extending battery life in portable devices. When compared to standard linear regulators that may draw over 100 µA under similar conditions, this characteristic makes the FT7421DQY more suitable for energy-sensitive designs. Its ultra-low dropout voltage (typically 200 mV at 300 mA) further enhances efficiency during transient load conditions. These combined characteristics position it favorably against many competing regulators in the same package size.

What are the thermal considerations when using the FT7421DQY in compact PCB layouts with limited copper area, especially during sustained output currents above 200 mA?: With a maximum junction-to-ambient thermal resistance (θJA) of 120°C/W in SOT23-6 packaging, the FT7421DQY can generate significant heat under continuous high-current operation. For example, at 500 mA output current with a 3V input-to-output differential, power dissipation reaches approximately 1.5W, potentially causing junction temperatures to rise by 180°C above ambient without adequate thermal relief. Engineers should allocate sufficient copper pour, consider thermal vias, or derate current levels to maintain safe operating temperatures below 125°C junction temperature.

Can the FT7421DQY be safely used as a direct replacement for the FT7320 in existing circuit designs without modifying compensation networks or external components?: While both devices are from the same manufacturer and serve similar voltage regulation functions, they are not pin-compatible nor functionally equivalent. The FT7320 operates at higher frequencies and has different internal architectures, requiring careful evaluation of stability margins and transient response. Substituting one for the other without verifying loop dynamics could lead to instability or excessive overshoot. A full redesign analysis is recommended before attempting such a substitution.

How does the enable threshold voltage of the FT7421DQY impact system-level power management strategies in multi-voltage microcontroller environments?: The FT7421DQY features a precise enable input with a turn-on threshold typically around 1.2V. This allows compatibility with 1.8V or 3.3V logic systems without level-shifting circuitry. Designers can use this feature to implement controlled sequencing in battery-powered systems, turning off the regulator when the main processor enters sleep mode. However, care must be taken to ensure that noise on the enable line does not cause unintended switching, especially in environments with high electromagnetic interference.

What precautions should be taken regarding input capacitance selection when using the FT7421DQY near its minimum specified value of 1 µF?: Using an input capacitor below 1 µF risks destabilizing the internal error amplifier due to insufficient phase margin, potentially causing oscillation or poor line transient response. In practical applications, a 2.2 µF ceramic capacitor with X5R or better dielectric is commonly employed to ensure robust performance across temperature and voltage variations. Additionally, placing the capacitor within 5 mm of the IC’s VIN pin minimizes parasitic inductance and improves noise filtering effectiveness.

How does the output voltage accuracy of the FT7421DQY (±3%) compare to adjustable LDO alternatives like the LP2985 in precision analog front-end applications?: The ±3% initial tolerance of the fixed-output FT7421DQY may be too coarse for applications requiring tight voltage control, such as sensor bias supplies or reference voltages. In contrast, adjustable regulators like the LP2985 allow fine-tuning via resistor dividers and often achieve better long-term stability. However, the FT7421DQY’s fixed output simplifies layout and reduces component count, making it acceptable where moderate accuracy suffices and space constraints are critical.

Is reverse current protection inherent in the FT7421DQY design, and what happens if the output is pulled above its regulated voltage during operation?: The FT7421DQY does not include built-in reverse current blocking diodes. If the output is driven externally above the set voltage—such as when connected to a charged supercapacitor or another powered rail—current will flow backward into the regulator, potentially exceeding absolute maximum ratings. To prevent damage, an external Schottky diode placed between output and ground can provide reverse protection, though it introduces a small forward voltage drop (~0.3V).

What are the implications of using the FT7421DQY in automotive or industrial environments where input transients up to 40V might occur?: Although the FT7421DQY is rated for a maximum input voltage of 6V, exposure to 40V pulses violates absolute maximum ratings and risks permanent damage. Without additional protection circuitry—such as transient voltage suppressors (TVS) or series resistors—the device cannot withstand such conditions. Engineers must incorporate input filtering and clamping networks compliant with IEC 61000-4-5 standards when deploying this regulator in harsh environments, ensuring all transients are attenuated before reaching the IC.

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Customer Reviews

Evaluation: 10 Articles

Embe***dMotion

Aug 5, 2026

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.
FPGA***dio

Jul 30, 2026

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.
Nord***mbedded

Jul 20, 2026

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.
Arch***ct

Jul 15, 2026

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.
FPGA***lorer88

Jul 7, 2026

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.
Nath***oleman

Jun 29, 2026

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.
Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

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Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

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FT7421DQY

FOCALTECH
32D-FT7421DQY

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Please refer to the English Version as our Official Version.Return

FT7421DQY - FOCALTECH

Specifications

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.