S-1131B32UA-N4RTFU

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

The S-1131B32UA-N4RTFU is a positive voltage regulator from the S-1131 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 3.2 V with an accuracy of ±1.0%. The device operates within an input voltage range of 2.0 V to 6.5 V and supports an output current of up to 300 mA. Current consumption during operation is typically 35 µA, while power-off consumption is typically 0.1 µA. The dropout voltage is typically 250 mV at 100 mA for this output level. Ripple rejection is typically 70 dB at 1.0 kHz. The component includes built-in overcurrent protection and an ON/OFF circuit, housed in a lead-free SOT-89-3 package.

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

• Built-in low on-resistance P-channel MOS FET transistor enables low dropout voltage and high output current capability.
• Integrated ON/OFF circuit allows control of regulator operation to minimize current consumption during standby.
• Built-in overcurrent protection circuit limits load current to prevent damage to the output transistor.
• CMOS technology ensures high ripple rejection and stable operation with external capacitors.

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

• Constant-voltage power supply for DVD and CD-ROM drives
• Constant-voltage power supply for battery-powered devices
• Constant-voltage power supply for personal communication devices
• Constant-voltage power supply for notebook PCs

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

Verify the specific ordering suffix against the manufacturer's datasheet to confirm pin configuration and environmental codes. Confirm availability status as the series may be marked not recommended for new design. Ensure the selected package matches the required PCB footprint and thermal dissipation capabilities for the intended application load.

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

Select this component when a fixed 3.2 V output is required with moderate current demands up to 300 mA. Consider the SOT-89-3 package for space-constrained designs requiring an ON/OFF function. Evaluate the output capacitor ESR requirements to ensure stability, as the device relies on internal phase compensation combined with external capacitor characteristics.

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

This part belongs to the S-1131 Series of middle output current CMOS voltage regulators. The series offers selectable output voltages from 1.5 V to 5.5 V in 0.1 V steps. It is designed for applications requiring low current consumption and high accuracy. The series is available in SOT-89-3, SOT-89-5, and 6-Pin HSON(A) packages.

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

Direct substitutes include other S-1131B32 variants with different packages or suffixes, such as S-1131B32UC-N4RTFU (SOT-89-5). Verify pinout compatibility and electrical specifications before substitution.

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

How does the ON/OFF pin logic work for the 'B' type product?

For the 'B' type product, applying a High level to the ON/OFF pin turns the regulator ON, while applying a Low level turns it OFF.

What is the recommended output capacitor type for stable operation?

A tantalum capacitor of 2.2 µF or more is recommended due to its ESR characteristics, which are necessary for stable phase compensation.