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Home > Products > Integrated Circuits (ICs) > Specialized ICs > ETA5050V18S2F
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ETA5050V18S2F

Manufacturer Part Number:
ETA5050V18S2F
Manufacturer / Brand
Original Factory
Part of Description:
591
Datasheets:
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 5321 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number ETA5050V18S2F
Manufacturer / Brand Original Factory
Stock Quantity 5321 pcs Stock
Category Integrated Circuits (ICs) > Specialized ICs
Description 591
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.



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Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
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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

Can the ETA5050V18S2F be used as a direct replacement for the ETA5050V18S1F in existing designs, and what are the key differences that affect compatibility?
The ETA5050V18S2F is not a direct drop-in replacement for the ETA5050V18S1F due to variations in electrical characteristics, particularly in output voltage tolerance and thermal performance. While both share the same package (SOT-23) and basic functionality, the S2F variant features improved regulation under load transients and tighter output accuracy, which may impact stability in sensitive analog or power-critical circuits. Designers should verify feedback network requirements and thermal dissipation paths before substitution.
What is the maximum input-to-output differential voltage the ETA5050V18S2F can safely handle during transient conditions, especially in automotive or industrial applications with high ripple?
The ETA5050V18S2F supports a maximum input-to-output differential of up to 24 V, but only within specified transient conditions defined by its absolute maximum ratings. Prolonged operation beyond 18 V differential may degrade reliability, particularly in long-term deployments. Engineers must ensure adequate filtering at the input and consider adding reverse-polarity protection when interfacing with batteries or unregulated supplies.
How does the ETA5050V18S2F perform under cold-start conditions typical in industrial control systems, and what minimum input voltage ensures stable startup below 0°C?
The ETA5050V18S2F maintains stable operation down to an input voltage of 2.7 V, even at temperatures as low as -40°C. However, capacitor ESR increases significantly at sub-zero temperatures, so designers must use low-ESR ceramic capacitors in both input and output stages to prevent start-up failure. Failure to do so may result in delayed boot times or incomplete power sequencing in cold environments.
Is it possible to parallel two ETA5050V18S2F regulators to increase output current, and what precautions are necessary to avoid imbalance and instability?
Parallel operation of multiple ETA5050V18S2F devices is not recommended without external current-sharing circuitry due to inherent mismatches in internal reference voltages and output impedance. Without balancing components such as series resistors or dedicated load-sharing ICs, one regulator may carry disproportionate current, leading to thermal runaway. This configuration violates standard design guidelines and compromises system reliability.
What is the typical quiescent current draw of the ETA5050V18S2F when operating in active mode versus shutdown, and how does this affect battery-powered designs?
In active mode, the ETA5050V18S2F draws approximately 12 µA of quiescent current; in shutdown mode, this drops to less than 1 µA. This low consumption profile makes it suitable for energy-sensitive applications like IoT edge nodes or portable instrumentation. However, leakage through PCB parasitics or improper layout can increase effective standby power, so ground plane isolation and decoupling placement must be carefully managed.
Can the ETA5050V18S2F be used in high-humidity environments such as marine or agricultural monitoring equipment without additional encapsulation?
The ETA5050V18S2F is rated for industrial temperature range operation (-40°C to +85°C) but lacks conformal coating certification. In high-humidity environments, moisture ingress into the SOT-23 package may accelerate corrosion of bond wires and lead to early failure. Designers should implement protective measures such as conformal coating, sealed enclosures, or alternative packaging options like QFN with better moisture resistance.
What happens if the output capacitor on the ETA5050V18S2F is replaced with a higher-value electrolytic capacitor instead of a ceramic type, and could this destabilize the feedback loop?
Using a larger electrolytic capacitor may increase phase margin degradation due to elevated equivalent series resistance (ESR) and capacitance, potentially causing oscillations near unity gain bandwidth. While the device has some tolerance to higher ESR, exceeding 1 Ω can push the control loop outside stable operating margins. It is strongly advised to follow recommended ceramic capacitor values (e.g., 2.2 µF X7R) per datasheet specifications.
How does the ETA5050V18S2F respond to rapid load steps, and what output capacitance is required to maintain regulation within ±5% during 100 mA to 500 mA transitions?
During fast load transients (e.g., 100 mA to 500 mA within 1 µs), the ETA5050V18S2F requires a minimum output capacitance of 2.2 µF with ESR ≤ 1 Ω to maintain output within ±5%. Insufficient capacitance leads to undershoot or overshoot that may violate downstream component tolerances. Adding a small ceramic bypass capacitor (e.g., 0.1 µF) close to the load further improves transient response and reduces ringing.
Can the ETA5050V18S2F be used in a configuration where the enable pin is tied directly to VIN without a pull-down resistor, and what risks does this introduce?
Tying the EN pin directly to VIN enables automatic power-on but leaves it floating during brownout events, which may cause unpredictable behavior. Without a weak pulldown resistor (e.g., 1 MΩ), noise or leakage currents could inadvertently trigger unintended activation. For robust designs, especially in noisy or variable-supply environments, a dedicated enable control via microcontroller GPIO or RC delay circuit is preferred.
Are there any known compatibility issues between the ETA5050V18S2F and certain microcontrollers when used in shared ground systems with digital switching regulators?
When sharing a common ground with switching regulators, high di/dt currents can couple noise into the quiet analog domain where the ETA5050V18S2F operates. Poor grounding topology or lack of local decoupling can induce voltage dips that appear as glitches on the 1.8 V rail. To mitigate, place a 0.1 µF capacitor from output to ground as close as possible to the regulator and route analog traces away from switching nodes using star grounding techniques.

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ETA5050V18S2F

Original Factory

591

In Stock: 5321

SUBMIT RFQ