S-13A1C19-U5T1U3

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

The S-13A1C19-U5T1U3 is a positive voltage regulator from the ABLIC S-13A1 Series, utilizing CMOS technology. It provides a fixed output voltage of 1.9 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 1000 mA output current. Key electrical characteristics include a typical dropout voltage of 70 mV at 300 mA, operation current of 60 μA typ., and ripple rejection of 70 dB typ. at 1.0 kHz. It operates within a temperature range of -40°C to +85°C and is housed in a SOT-89-5 package.

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

• Built-in overcurrent protection circuit limits output transistor current.
• Thermal shutdown circuit prevents damage caused by overheating.
• Inrush current limit circuit restricts excessive current during power-on or ON/OFF transitions.
• ON/OFF circuit ensures long battery life with selectable discharge shunt and pull-down functions.

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

• Constant-voltage power supply for battery-powered devices
• Constant-voltage power supply for TV, notebook PC, and home electric appliances
• Constant-voltage power supply for portable equipment

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

Verify the specific suffix U5T1U3 corresponds to the SOT-89-5 tape packaging and lead-free/halogen-free compliance as defined in the datasheet product name structure. Confirm that the C-type designation matches the required availability of the pull-down resistor function and unavailability of the discharge shunt function for your application design.

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

Select this component when a fixed 1.9 V output is required with high accuracy and low quiescent current. Ensure the input voltage remains within the 1.5 V to 5.5 V range and that thermal dissipation limits are respected at high load currents. Verify compatibility with ceramic capacitors of 2.2 μF or more for stability.

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

This part belongs to the S-13A1 Series, which offers internally set output voltages from 1.0 V to 3.5 V in 0.05 V steps. The series includes variants with different pin configurations and internal functions, such as adjustable inrush current limits via external capacitors. The C-type specifically features an available pull-down resistor and unavailable discharge shunt function.

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

Other S-13A1 Series parts with the same output voltage (1.9 V) but different packages (HSOP-8A, HSOP-6) or types (A, B, D) may be considered if pinout and functional differences like discharge shunt or pull-down availability are acceptable.

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

What is the function status of the discharge shunt and pull-down resistor for the S-13A1Cxx type?

For the S-13A1Cxx type, the discharge shunt function is unavailable, while the pull-down resistor function is available.

How is the inrush current limit time adjusted for internally set output voltage types?

The inrush current limit time can be changed by connecting an external capacitor (CSS) between the SSC pin and the VSS pin. Without CSS, it is fixed at 0.4 ms typ.