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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators > S-1312A27-M5T1U3
ABLIC Inc.
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S-1312A27-M5T1U3

In Stock 57536 pcs Reference Price(In US Dollars)
1+
$1.0901
200+
$0.4355
500+
$0.4213
1000+
$0.4141
Manufacturer Part Number:
S-1312A27-M5T1U3
Manufacturer / Brand
ABLIC Inc.
Part of Description:
IC REG LINEAR 2.7V 150MA SOT23-5
Datasheets:
S-1312A27-M5T1U3(1).pdfS-1312A27-M5T1U3(2).pdfS-1312A27-M5T1U3(3).pdfS-1312A27-M5T1U3(4).pdf
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 57536 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number S-1312A27-M5T1U3
Manufacturer / Brand ABLIC Inc.
Stock Quantity 57536 pcs Stock
Category Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Description IC REG LINEAR 2.7V 150MA SOT23-5
Lead Free Status / RoHS Status: RoHS Compliant
Voltage Dropout (Max) 0.32V @ 100mA
Voltage - Output (Min/Fixed) 2.7V
Voltage - Output (Max) -
Voltage - Input (Max) 5.5V
Supplier Device Package SOT-23-5
Series S-1312
Protection Features Overcurrent, Thermal Shutdown
Package / Case SC-74A, SOT-753
Package Tape & Reel (TR)
PSRR 70dB (1kHz)
Output Type Fixed
Output Configuration Positive
Operating Temperature -40°C ~ 85°C (TA)
Number of Regulators 1
Mounting Type Surface Mount
Current - Quiescent (Iq) 30 µA
Current - Output 150mA
Control Features Enable
Base Product Number S-1312

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

What are the key design considerations when integrating the S-1312A27-M5T1U3 linear regulator into a battery-powered IoT device with strict quiescent current requirements?
The S-1312A27-M5T1U3 offers a quiescent current of only 30 µA, making it suitable for low-power applications such as battery-operated IoT sensors. However, designers must ensure that the total system current budget accounts for this Iq in sleep modes and that the dropout voltage (0.32V at 100mA) is acceptable given the input-to-output differential under peak load. Additionally, the 150mA output current may require careful PCB layout to manage thermal dissipation during transient loads.
How does the enable pin functionality of the S-1312A27-M5T1U3 affect system power sequencing in multi-voltage embedded designs?
The S-1312A27-M5T1U3 features an active-high enable pin that allows precise control over when regulation begins. This enables designers to implement controlled power-up sequences in systems where downstream components have specific startup timing requirements, preventing brownout conditions or inrush currents. The enable signal should be driven by a microcontroller GPIO or dedicated sequencer, ensuring the 2.7V rail stabilizes before enabling other subsystems.
Can the S-1312A27-M5T1U3 be used as a drop-in replacement for the S-1312B27-M5T1U3 in existing designs without modifying the PCB?
Yes, the S-1312A27-M5T1U3 is electrically compatible with the S-1312B27-M5T1U3, sharing identical output voltage, package, and pinout. Both regulators support the same input range (up to 5.5V), output current, and protection features. Therefore, it can typically serve as a direct replacement in production environments without requiring changes to the layout or external components.
What precautions should be taken when using the S-1312A27-M5T1U3 near its maximum input voltage in industrial temperature environments?
Although the S-1312A27-M5T1U3 operates from -40°C to 85°C, operating at the upper limit of input voltage (5.5V) combined with high ambient temperatures increases junction temperature. Designers should evaluate thermal resistance (RθJA) and ensure sufficient airflow or trace area to avoid exceeding the thermal shutdown threshold. Derating the maximum input voltage by 0.3–0.5V under worst-case conditions is recommended for long-term reliability.
Is it acceptable to operate the S-1312A27-M5T1U3 with no load connected, and what stability implications arise?
The S-1312A27-M5T1U3 is stable across its entire specified load range, including no-load conditions, due to internal compensation. No additional output capacitor is required for stability, but including a small ceramic capacitor (≥1µF) improves transient response and noise immunity. However, bypassing the regulator entirely during extended idle periods may be more efficient than relying on its 30 µA quiescent current.
How does the PSRR performance of the S-1312A27-M5T1U3 impact noise-sensitive analog circuits powered from a switched-mode supply upstream?
With a PSRR of 70dB at 1kHz, the S-1312A27-M5T1U3 attenuates switching noise effectively but may not fully suppress high-frequency ripple from sources like buck converters operating above 100kHz. For sensitive analog front-ends, additional post-regulation filtering using LC networks or second-stage regulators may be necessary to meet clean 2.7V rail requirements.
What are the limitations of using the S-1312A27-M5T1U3 in applications requiring higher output currents beyond 150mA?
The S-1312A27-M5T1U3 is rated for a maximum continuous output current of 150mA. Exceeding this value risks triggering overcurrent protection or causing thermal overload, especially if the input-to-output differential is large. In such cases, designers should consider using multiple regulators in parallel (with current-sharing diodes), selecting a higher-current PMIC, or implementing external pass transistors with feedback control.
Does the S-1312A27-M5T1U3 support hot-swapping into live PCBs without risk of damage?
While the S-1312A27-M5T1U3 includes overcurrent and thermal shutdown protections, hot-plugging it into a powered system without reverse polarity safeguards can still cause stress on the device and surrounding circuitry. It is advisable to include input protection diodes and ensure the enable pin is deasserted during insertion unless designed for hot-swap capability with proper inrush limiting.
How does the S-1312A27-M5T1U3 compare to alternative LDOs in terms of dropout voltage and efficiency for portable medical devices?
The S-1312A27-M5T1U3 has a dropout voltage of 0.32V at 100mA, which translates to lower efficiency than switching regulators when input voltage approaches 3.0V. However, its ultra-low quiescent current (30 µA) and integrated protections make it preferable in compact, always-on medical monitoring devices where size, noise, and simplicity outweigh conversion efficiency concerns.
Are there any known issues with using electrolytic capacitors at the input or output of the S-1312A27-M5T1U3 in automotive-grade applications?
Electrolytic capacitors can introduce ESR-related instability in LDOs, but the S-1312A27-M5T1U3’s internal architecture tolerates moderate ESR. However, in harsh environments (e.g., automotive), ceramic capacitors are strongly recommended due to their reliability, smaller footprint, and better performance across temperature. If electrolytics are used, they should be rated for the full operating temperature range and placed close to the regulator.

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S-1312A27-M5T1U3

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ABLIC Inc.

IC REG LINEAR 2.7V 150MA SOT23-5

In Stock: 57536

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