S-1721A3318-I6T1U

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

The S-1721A3318-I6T1U is a dual-channel positive voltage regulator from the S-1721 Series, manufactured by ABLIC Inc. It provides fixed output voltages of 3.3 V on channel 1 and 1.8 V on channel 2, with an accuracy of ±1.0%. The device supports a maximum input voltage of 6.5 V and delivers up to 150 mA per circuit. It features low dropout characteristics, high ripple rejection (75 dB typ.), and built-in overcurrent protection. The IC operates within a temperature range of -40°C to +85°C and is housed in a compact SNT-6A package.

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

• Dual-channel architecture providing independent 3.3 V and 1.8 V outputs within a single super-small package.
• Integrated ON/OFF control circuits for both channels to manage power consumption and extend battery life.
• Built-in overcurrent protection circuitry to limit output current and safeguard against short-circuit conditions.
• Capable of utilizing small ceramic capacitors for stable operation across the specified temperature range.

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

• Constant-voltage power supply for cellular phones
• Power regulation for battery-powered devices

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific ordering suffix matches the required pin configuration and environmental specifications. Check for product discontinuance notices as this series may be marked not recommended for new design. Ensure compliance with RoHS and halogen-free requirements if applicable to your assembly process.

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

Select this component when a dual-output LDO with low quiescent current is required for space-constrained mobile applications. Verify that the input voltage remains within the 6.5 V absolute maximum rating. Consider the thermal dissipation limits of the SNT-6A package if operating near the maximum output current. Ensure external capacitor values meet the minimum stability requirements specified in the datasheet.

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

This part belongs to the S-1721 Series, which utilizes CMOS technology to achieve low dropout voltage and high ripple rejection. The series is designed for mobile devices requiring efficient power management. The S-1721A3318 variant specifically configures the internal resistors to yield 3.3 V and 1.8 V outputs, distinguishing it from other voltage combinations in the family.

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

S-1721A3318-M6T1x

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

What is the logic level for the ON/OFF pins on the S-1721A type?

For the S-1721A type, both Channel 1 and Channel 2 ON/OFF pins are active high. Setting the pin to a high level enables the regulator, while a low level disables it.

Can ceramic capacitors be used for input and output stabilization?

Yes, the S-1721 Series is designed to operate stably with ceramic capacitors of 1.0 µF or more for both input and output applications.