S-1333A29-M5T1U3

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

The S-1333A29-M5T1U3 is a positive voltage regulator IC from the S-1333 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 2.9 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 up to 300 mA under specified conditions. It features a typical dropout voltage of 160 mV at 100 mA load and a low current consumption of 25 μA during operation. The component utilizes a SOT-23-5 package and includes built-in overcurrent protection and thermal shutdown circuits.

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

• Built-in discharge shunt function for rapid output capacitor discharge when powered off
• Internal pull-down resistor on the ON/OFF pin to ensure defined logic states
• High ripple rejection capability using ceramic capacitors of 1.0 μF or more
• Integrated overcurrent protection and thermal shutdown circuits

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

• Constant-voltage power supply for portable communication devices
• Power source for battery-powered digital cameras
• Voltage regulation for digital audio players
• Constant-voltage supply for home electric appliances

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

Verify the specific product type suffix 'A' confirms the presence of both the discharge shunt function and the internal pull-down resistor on the ON/OFF pin. Ensure the ordering code matches the required SOT-23-5 package configuration. Confirm environmental compliance details such as lead-free and halogen-free status if required for the target application.

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

Select this variant when an active high ON/OFF control signal is required alongside automatic output discharge capabilities. The internal pull-down resistor simplifies circuit design by preventing floating pin states without external components. Consider the power dissipation limits of the SOT-23-5 package when designing for high load currents or elevated ambient temperatures.

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

This component belongs to the S-1333 Series of CMOS low-dropout voltage regulators. The series offers selectable output voltages in 0.05 V steps ranging from 1.0 V to 3.5 V. The 'A' designation specifically indicates a product type with active high logic, available discharge shunt, and available pull-down resistor functions, distinguishing it from B, C, and D types which vary these internal features.

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

S-1333B29-M5T1U3

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

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

For the S-1333A type, the ON/OFF pin has an internal pull-down resistor connected to VSS. Consequently, leaving the pin floating sets the VOUT pin to the VSS level (OFF state).

How does the discharge shunt function operate?

When the ON/OFF pin is set to the OFF level, the internal discharge shunt circuit activates to rapidly discharge the output capacitance, allowing the VOUT pin to reach the VSS level quickly.