S-13R1A33-M5T1U3

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

The S-13R1A33-M5T1U3 is a CMOS positive voltage regulator IC from the S-13R1 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 3.3 V with an accuracy of ±1.0%. The device supports a maximum output current of 150 mA and operates within an input voltage range of 2.0 V to 5.5 V. Key electrical characteristics include a typical dropout voltage of 150 mV at 100 mA, a ripple rejection ratio of 70 dB typ., and a low current consumption of 5 μA during operation. It features reverse current protection limiting leakage to 0.09 μA max.

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

• Built-in reverse current protection function prevents current flow from the VOUT pin to the VIN pin, eliminating the need for external protection diodes.
• Integrated overcurrent protection circuit limits output current to protect the load transistor, accompanied by a thermal shutdown circuit that halts regulation at high junction temperatures.
• Includes an ON/OFF control circuit that significantly reduces current consumption when disabled, supporting extended battery life in portable applications.
• Utilizes a discharge shunt function to rapidly dissipate charge from the output capacitor when the device is turned off.

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

• Constant-voltage power supply for battery-powered devices
• Power management for portable equipment
• Voltage regulation for home electric appliances
• Power supply circuits for mobile phones

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

Verify the specific product type suffix (A, B, C, or D) to ensure compatibility with required ON/OFF logic states, discharge shunt functionality, and pull-down configurations. Confirm package selection matches the design footprint requirements. Ensure input and output capacitors meet the minimum capacitance specifications for stable operation under all expected load and temperature conditions.

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

Select this component for applications requiring low quiescent current and robust protection against reverse polarity conditions without external components. Consider the package power dissipation limits when designing for high output currents or elevated ambient temperatures. Verify that the chosen package variant aligns with the necessary internal circuit functions such as discharge shunts or pull-down resistors.

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

This part belongs to the S-13R1 Series, which comprises various fixed-output voltage regulators available in multiple packages including SOT-23-5, SC-82AB, and HSNT-4. The series is characterized by its CMOS technology, offering high accuracy and low current consumption suitable for battery-operated systems. Different suffixes denote variations in internal control logic and auxiliary functions.

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

S-13R1B33-M5T1U3

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

How does the reverse current protection function operate?

The device detects when the input voltage drops below the output voltage and switches the connection direction of the parasitic diode to prevent current from flowing backward into the input pin, limiting reverse current to a maximum of 0.09 μA.

What is the purpose of the discharge shunt function?

The discharge shunt function actively discharges the output capacitor when the ON/OFF pin is set to the OFF level, allowing the output voltage to reach the ground potential rapidly.