S-1333A21-M5T1U3

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

The S-1333A21-M5T1U3 is a positive voltage regulator IC from the S-1333 Series, manufactured by ABLIC Inc. using CMOS technology. It provides a fixed output voltage of 2.1 V with an accuracy of ±1.0%. The device operates within an input voltage range of 1.5 V to 5.5 V and supports an output current of up to 300 mA when conditions are met. It features low current consumption of 25 μA typical during operation and includes built-in overcurrent protection and thermal shutdown circuits. The component is housed in an SOT-23-5 package.

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

• Integrates ON/OFF control logic for power management and extended battery life
• Includes internal discharge shunt circuit for rapid output capacitor discharge
• Features high ripple rejection capability for stable noise filtering
• Built-in thermal shutdown and overcurrent protection circuits

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

• Constant-voltage power supply for portable communication devices
• Power source for digital cameras and digital audio players
• Battery-powered electronic devices requiring low quiescent current

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

Verify the specific product type 'A' configuration, which enables both the discharge shunt function and pull-down resistor on the ON/OFF pin. Confirm that the ordering suffix M5T1 corresponds to the SOT-23-5 package with tape packing specifications. Ensure compatibility with ceramic capacitors of 1.0 μF or more for input and output stabilization as required by the datasheet.

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

Select this component for applications requiring a fixed 2.1 V output with high accuracy. Consider the S-1333A variant specifically if the design requires the internal discharge shunt function to quickly drain output capacitance upon shutdown. Evaluate the package power dissipation limits, particularly at higher load currents, to ensure operation remains within safe thermal boundaries.

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

This part belongs to the S-1333 Series of 5.5 V input, 300 mA voltage regulators developed by ABLIC Inc. The series utilizes CMOS technology to achieve low current consumption and high ripple rejection. The 'A' designation indicates specific internal logic configurations regarding the ON/OFF pin functionality compared to other series variants.

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

S-1333A21-A4T2U3 (HSNT-4 1010 Package)

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

What is the behavior of the ON/OFF pin when left floating?

For the S-1333 Series A type, the ON/OFF pin is internally pulled down to the VSS pin in the floating status, setting the VOUT pin to the VSS level.

How does the discharge shunt function operate?

When the ON/OFF pin is set to OFF, the discharge shunt circuit turns on to rapidly discharge the output capacitance, allowing the VOUT pin to reach the VSS level faster than through internal divided resistors alone.