S-1122B27MC-L8MTFG

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The ABLIC S-1122B27MC-L8MTFG is a positive voltage regulator from the S-1112/1122 Series, utilizing CMOS technology. It provides a fixed output voltage of 2.7 V with an accuracy of ±1.0%. The device supports an output current of up to 150 mA and operates within an input voltage range of 2.0 V to 6.5 V. Key electrical characteristics include a typical dropout voltage of 200 mV at 100 mA, a ripple rejection ratio of 80 dB at 1.0 kHz, and a current consumption of 50 µA during operation. It features built-in overcurrent protection and an ON/OFF circuit. The component is housed in a SOT-23-5 package and functions reliably across an ambient temperature range of -40°C to +85°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Built-in low on-resistance transistor enables low dropout voltage and high output current capability.
• Integrated overcurrent protection circuit limits load current to prevent damage to the output transistor.
• ON/OFF control pin allows for complete shutdown of internal circuits to minimize power consumption.
• Compatible with small ceramic capacitors for phase compensation and stability.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Constant-voltage power supply for battery-powered devices
• Constant-voltage power supply for personal communication devices
• Constant-voltage power supply for home electric appliances
• Constant-voltage power supply for cellular phones

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix against official documentation to confirm environmental codes and tape specifications. Confirm that the selected variant matches the required ON/OFF logic polarity (Type B) and package type. Ensure application conditions do not exceed the absolute maximum ratings for input voltage or power dissipation. Cross-reference the datasheet revision to validate all electrical parameters before finalizing procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 2.7 V output is required with high accuracy and low quiescent current. Ensure the input voltage remains within the specified 2.0 V to 6.5 V range under all operating conditions. Verify that the load current does not exceed 150 mA and that thermal constraints allow for adequate heat dissipation in the SOT-23-5 package. Confirm compatibility with external ceramic capacitors meeting the ESR requirements for stable operation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the ABLIC S-1122 Series, which are CMOS voltage regulators designed for high ripple rejection and low dropout performance. The series offers selectable output voltages from 1.5 V to 5.5 V in 0.1 V steps. The S-1122 variant specifically utilizes a SOT-23-5 package with a distinct pin configuration compared to the S-1112 series, facilitating high-density mounting in compact electronic designs.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

S-1122B27MC-L8ATFx: Identical electrical specifications but utilizes Type A (negative logic) ON/OFF pin configuration instead of Type B.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the recommended output capacitor for the S-1122B27MC-L8MTFG?

A ceramic capacitor with a capacitance of 0.47 µF or more can be used. The equivalent series resistance (ESR) must be 10 Ω or less to ensure stability.

How does the ON/OFF pin function in the Type B configuration?

In the Type B configuration, applying a High level turns the regulator ON, while applying a Low level turns it OFF. When OFF, current consumption drops significantly.

What is the typical ripple rejection ratio at 1.0 kHz?

The typical ripple rejection ratio is 80 dB when measured at a frequency of 1.0 kHz with an output current of 30 mA.