S-1312A31-A4T2U3

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

The ABLIC S-1312A31-A4T2U3 is a positive voltage regulator IC from the S-1312 Series, developed using CMOS technology. It provides a fixed output voltage of 3.1 V with an accuracy of ±1.0%. The device supports an input voltage range of 1.5 V to 5.5 V and delivers up to 150 mA of output current. Key electrical characteristics include a typical dropout voltage of 160 mV at 100 mA, a ripple rejection ratio of 70 dB typ., and low current consumption of 20 μA during operation. It operates within a temperature range of -40°C to +85°C and is housed in an HSNT-4 (1010) package.

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

• Built-in overcurrent protection circuit limits excessive output current to protect the output transistor.
• Integrated thermal shutdown circuit prevents damage caused by overheating.
• Features an ON/OFF control pin that allows for active high logic control and significantly reduces current consumption when disabled.

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

• Constant-voltage power supply for portable communication devices
• Constant-voltage power supply for digital cameras and digital audio players
• Constant-voltage power supply for battery-powered home electric appliances

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

Verify the specific product type suffix 'A' corresponds to the required discharge shunt and pull-down resistor functions before ordering. Confirm the package designation 'HSNT-4 (1010)' matches the PCB land pattern requirements. Ensure external ceramic capacitors meet the minimum capacitance specifications for stability. Check environmental compliance documentation for lead-free and halogen-free status if required by project specifications.

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

Select this component for applications requiring a fixed 3.1 V output with high accuracy. Consider the HSNT-4 (1010) package for space-constrained designs. Evaluate power dissipation limits based on the expected input-output voltage differential and load current. Verify that the application environment stays within the specified operating temperature range. Ensure input and output capacitor values are sufficient to prevent oscillation.

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

This part belongs to the S-1312 Series of low-dropout voltage regulators manufactured by ABLIC Inc. The series utilizes CMOS process technology to achieve low current consumption and high ripple rejection. The 'A' suffix indicates a specific functional configuration regarding the ON/OFF pin's internal pull-down and discharge shunt capabilities. The HSNT-4 (1010) package offers a compact surface-mount solution suitable for modern electronic devices.

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

S-1312A31-M5T1U3

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

What is the function of the ON/OFF pin in the S-1312A31-A4T2U3?

The ON/OFF pin controls the operation of the regulator. Setting it to a high level activates the regulator, while setting it to a low level stops operation and significantly reduces current consumption.

Does the S-1312A31-A4T2U3 have a discharge shunt function?

Yes, as an 'A' type device, it includes a built-in discharge shunt circuit that rapidly discharges the output capacitance when the ON/OFF pin is set to the OFF level.