S-1112B27PI-L6MTFG 2.7V 150mA Low Dropout Voltage Regulator

ElecSuppliers Part Number GuideAug 22, 2026

S-1112B27PI-L6MTFG is a low-dropout CMOS voltage regulator from the S-1112 series. It provides a fixed 2.7 V output and can deliver up to 150 mA of output current.

The device is designed for electronic equipment that requires a stable low-voltage supply from a higher input voltage. Its low power consumption, low dropout characteristics and high ripple rejection make it suitable for compact battery-powered and portable electronic systems.

S-1112B27PI-L6MTFG Key Specifications

S-1112B27PI-L6MTFG provides a fixed 2.7 V positive output with an output current rating of up to 150 mA.

The maximum input voltage is approximately 6.5 V. The typical quiescent current is around 1 µA, while the maximum supply current is approximately 90 µA.

The dropout voltage is specified at approximately 0.29 V at a 100 mA output current.

The device operates over approximately -40°C to +85°C and uses a compact SNT-6A package with six terminals.

2.7V LDO Voltage Regulator

The 2.7 V fixed output makes S-1112B27PI-L6MTFG suitable for low-voltage digital and analog circuits.

A low-dropout regulator can continue regulating the output even when the input voltage is relatively close to the desired output voltage.

This is useful in battery-powered products where the available input voltage gradually decreases during operation.

Instead of requiring a large voltage difference between input and output, the LDO is designed to maintain regulation with a relatively small voltage difference.

S-1112B27PI-L6MTFG Low Dropout Voltage

Low dropout performance is one of the important characteristics of this regulator.

The dropout voltage is approximately 0.29 V at 100 mA. This means that under the specified test conditions, the input voltage can approach the 2.7 V output while the regulator continues to maintain regulation.

Lower dropout voltage can help improve the usable energy of battery-powered equipment.

For example, when a battery voltage decreases during discharge, an LDO with a lower dropout requirement can continue supplying the required output for a longer portion of the battery's operating range.

150mA Output Current

S-1112B27PI-L6MTFG can provide up to 150 mA of output current.

This makes it suitable for powering relatively small processors, sensors, memory devices, communication circuits and other low-power electronic loads.

The actual available output current depends on input voltage, temperature, PCB thermal characteristics and the required output voltage regulation.

When operating close to the maximum current, thermal conditions should be evaluated carefully.

Low Quiescent Current

The S-1112 series is designed for low current consumption.

S-1112B27PI-L6MTFG has a typical quiescent current of approximately 1 µA, making it suitable for battery-powered equipment where the regulator itself should consume very little energy.

Low quiescent current is particularly useful in portable products that spend long periods in standby or low-power operating modes.

Applications such as sensors, portable instruments and compact embedded devices can benefit from reducing the regulator's contribution to overall standby consumption.

High Ripple Rejection

S-1112B27PI-L6MTFG provides high ripple rejection characteristics, with approximately 80 dB specified at 1 kHz.

Ripple rejection describes the regulator's ability to suppress unwanted variations present on the input supply before they appear at the output.

This can be valuable when the regulator is supplied by a switching converter or another power source containing switching noise.

A high-ripple-rejection LDO can help provide a cleaner supply for sensitive analog, audio, sensor or digital circuits.

Enable Control

S-1112B27PI-L6MTFG includes an enable control function.

The enable input allows the system controller to turn the regulator on or off according to operating conditions.

This can be useful in products containing multiple power domains. A processor or power-management controller can disable the regulator when the associated circuit is not required.

Combining the enable function with the low quiescent current can help reduce unnecessary power consumption in portable equipment.

S-1112B27PI-L6MTFG Applications

S-1112B27PI-L6MTFG can be used in a wide range of low-power electronic equipment.

Typical applications include electronic notebooks, cameras, video equipment, CPU power supplies, digital audio equipment, smart cards and industrial electronics.

The fixed 2.7 V output is also suitable for circuits that require a dedicated low-voltage rail for sensors, logic devices or other semiconductor components.

SNT-6A Package

S-1112B27PI-L6MTFG uses an SNT-6A package with six terminals.

The compact surface-mount package helps reduce PCB space and is suitable for densely populated electronic designs.

Because the package is small, PCB layout and soldering quality are important. The recommended land pattern should be followed to ensure reliable assembly.

Thermal performance should also be considered when the regulator is operated close to its maximum output current.

S-1112B27PI-L6MTFG Protection

The regulator incorporates overcurrent protection.

This protection helps reduce the risk of damage when the output is subjected to excessive current or a short-circuit condition.

Protection circuitry should not replace proper power-supply design. The input and output capacitors, PCB layout and load conditions should still be designed according to the regulator's operating requirements.

S-1112B27PI-L6MTFG Replacement

When selecting a replacement for S-1112B27PI-L6MTFG, the fixed 2.7 V output should be matched first.

The 150 mA output-current capability, low dropout voltage, enable function, input-voltage range and package should also be checked.

The pin configuration is particularly important because a replacement LDO with the same output voltage may use a different pin arrangement.

A regulator with a different dropout characteristic or quiescent current can also change the behavior of a battery-powered system.

S-1112B27PI-L6MTFG Design Considerations

When designing with this LDO, engineers should consider the difference between input and output voltage, load current and power dissipation.

The approximate regulator power dissipation can be calculated from:

P = (VIN − VOUT) × IOUT

For a 2.7 V output, increasing the input voltage increases the amount of heat generated inside the regulator.

For example, operating from a substantially higher input voltage while drawing close to 150 mA can produce significantly more heat than operating with an input voltage only slightly above 2.7 V.

The PCB should therefore provide appropriate thermal conditions for the intended load.

S-1112B27PI-L6MTFG for Low-Power Electronics

S-1112B27PI-L6MTFG combines a fixed 2.7 V output, 150 mA current capability, low dropout voltage, low quiescent current and high ripple rejection in a compact six-pin package.

These characteristics make it suitable for low-voltage power rails in portable electronics, digital equipment, sensors and other compact electronic systems.

For new designs, engineers should evaluate input voltage, output current, dropout voltage, power dissipation and enable-control requirements together. For replacement applications, matching the complete electrical specifications and SNT-6A package configuration is important for reliable operation.