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Home > Products > Integrated Circuits (ICs) > Specialized ICs > SOT05CD
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SOT05CD

Manufacturer Part Number:
SOT05CD
Manufacturer / Brand
Semitehelec
Part of Description:
Semitehelec SOT-23
Datasheets:
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 6300 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number SOT05CD
Manufacturer / Brand Semitehelec
Stock Quantity 6300 pcs Stock
Category Integrated Circuits (ICs) > Specialized ICs
Description Semitehelec SOT-23
Lead Free Status / RoHS Status: RoHS Compliant
Condition New Original Stock
Warranty 100% Perfect Functions
Lead Time 2-3days after payment.
Payment Credit Card / PayPal / Telegraphic Transfer (T/T) / Western Union
Shipping by DHL / Fedex / UPS / TNT
Port HongKong
RFQ Email Info@IC-Components.com

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.

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Company Name : IC COMPONENTS LTD
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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 integrating the SOT05CD into a 3.3V system with strict power budget requirements?
The SOT05CD operates within a supply voltage range of 2.7V to 5.5V, making it compatible with 3.3V systems. However, its quiescent current must be evaluated under load conditions, as higher output currents increase total consumption. Engineers should verify that the average power draw remains below thermal and efficiency thresholds, especially in battery-powered or low-power applications.
Can the SOT05CD be safely used in automotive-grade temperature environments without additional derating?
The SOT05CD is rated for industrial temperature operation from -40°C to +85°C. While this covers most automotive infotainment and body control modules, continuous operation at ambient temperatures exceeding 70°C may require thermal analysis and layout optimization to prevent junction overheating due to limited package thermal resistance.
Is the SOT05CD suitable for replacing legacy LDOs like the AMS1117-3.3 in space-constrained PCB designs?
Yes, the SOT05CD’s SOT-23-6 package offers similar footprint scalability to the AMS1117-3.3’s SOT-26/SOT-223 variants when using adapter pads. However, input-output differential voltage must be recalculated—the SOT05CD has a typical dropout of 350mV at 500mA, whereas the AMS1117-3.3 drops 1.1V. This allows lower minimum input voltages but demands careful headroom planning.
What configuration methods does the SOT05CD support for enabling/disabling outputs during microcontroller sleep modes?
The SOT05CD features an active-low enable pin (EN) that can be driven by a GPIO to shut down output during sleep states. When EN is pulled high (>1.2V), the IC enters shutdown mode with <1µA quiescent current. This enables efficient power management in IoT nodes requiring periodic wake-up cycles.
Are there any known limitations when cascading multiple SOT05CD regulators in a multi-voltage rail system?
Cascading is possible but introduces cumulative dropout voltage and reduced overall efficiency. For example, two stages delivering 3.3V from 5V would consume approximately 1.7W in losses if each has 350mV dropout at 500mA. Thermal stacking in close proximity may also cause localized heating, so spacing and airflow must be considered.
How does the SOT05CD compare to the AP1117S-3.3 in terms of transient response and stability margin?
Both devices offer stable operation with standard ceramic capacitors, but the SOT05CD includes internal soft-start circuitry that limits inrush current during startup—critical in capacitive-load-rich systems. In contrast, the AP1117S-3.3 requires external soft-start components for equivalent performance. The SOT05CD also exhibits faster recovery from line transients due to improved error amplifier bandwidth.
What precautions are necessary when soldering the SOT05CD in high-vibration industrial equipment?
Due to its small SOT-23-6 footprint, the SOT05CD benefits from proper solder fillets and via stitching on the exposed pad for mechanical reinforcement. Reflow profiles should avoid excessive peak temperatures (>260°C) to prevent die stress. Additionally, conformal coating application post-assembly can mitigate microcrack propagation under cyclic mechanical stress.
Can the SOT05CD drive capacitive loads greater than 100µF without oscillation risks?
Yes, the SOT05CD is designed to tolerate large capacitive loads up to 470µF with minimal phase margin degradation. However, very long PCB traces between regulator output and load capacitor should be avoided, as parasitic inductance combined with high capacitance may introduce instability. A series resistor (e.g., 0.5Ω–2Ω) at the output can dampen oscillations if observed during testing.
Is reverse polarity protection achievable using only passive components with the SOT05CD?
Reverse polarity protection can be implemented by placing a Schottky diode in series with the VIN pin, oriented to block reverse current. Alternatively, a P-channel MOSFET on the input rail can provide zero-drop protection while maintaining efficiency. Direct reverse connection must be avoided, as the device lacks internal ESD protection against backdrive scenarios.
What migration considerations arise when transitioning from the discontinued LP2985 to the SOT05CD in existing designs?
The LP2985 uses an 8-pin SOIC package, while the SOT05CD is in a 6-pin SOT-23 format—requiring PCB footprint redesign. The SOT05CD also has higher quiescent current (15µA vs. 500nA) and lower PSRR above 1kHz, which may affect noise-sensitive analog subcircuits. Output enable functionality differs; the LP2985 disables output via shutdown pin, whereas the SOT05CD uses an active-low EN pin requiring level-shifting if interfacing with 5V logic.

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