S-1333B1C-A4T2U3

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

The S-1333B1C-A4T2U3 is a positive voltage regulator IC from the S-1333 Series, manufactured by ABLIC Inc. It utilizes CMOS technology to provide a fixed output voltage of 1.0 V with an accuracy of ±15 mV. The device supports an input voltage range of 1.5 V to 5.5 V and delivers up to 300 mA of output current. Key electrical characteristics include a typical dropout voltage of 0.65 V at 100 mA, a ripple rejection ratio of 75 dB at 1.0 kHz, and a quiescent current of 25 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 discharge shunt function for rapid output capacitor discharge when the ON/OFF pin is set to the OFF level.
• Integrated overcurrent protection circuit that limits output transistor current to prevent damage during short circuits.
• Thermal shutdown circuit activates at approximately 150°C to stop regulation and releases at 120°C to restart operation.
• Low power consumption with typical operating current of 25 μA and power-off current of 0.1 μA.

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
• Power supply for home electric appliances

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

Verify the specific ordering suffix against the manufacturer's datasheet to confirm the package type and tape specifications. Ensure compatibility with the required output voltage step and function selection, such as the pull-down resistor availability. Confirm environmental compliance status and lead-free requirements before finalizing procurement orders.

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

Select this component for applications requiring low quiescent current and high ripple rejection. The B-type variant includes a discharge shunt but lacks an internal pull-down resistor on the ON/OFF pin, requiring external connection if unused. Ensure input and output capacitors are ceramic types with capacitance of 1.0 μF or more for stability. Consider package power dissipation limits when designing for high load currents.

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 using CMOS technology. The series offers selectable output voltages from 1.0 V to 3.5 V in 0.05 V steps. The 'B' designation indicates active high ON/OFF logic with a discharge shunt function but without a pull-down resistor. The 'A4T2' suffix denotes the HSNT-4 (1010) package with tape packing.

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

Other S-1333 Series variants with different output voltages or package types may serve as functional substitutes if electrical parameters align. Verify that replacement parts match the required ON/OFF logic and discharge/pull-down configurations. Cross-reference absolute maximum ratings and thermal characteristics to ensure system safety.