S-1132B28-U5T1G

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

The S-1132B28-U5T1G is a positive voltage regulator from the S-1132 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 2.8 V with an accuracy of ±1.0%. The device supports an input voltage range of 2.0 V to 6.5 V and delivers up to 300 mA of output current. Key electrical parameters include a typical dropout voltage of 130 mV at 100 mA, a ripple rejection ratio of 70 dB at 1.0 kHz, and a quiescent current consumption of 20 μA during operation. It operates within a temperature range of -40°C to +85°C.

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

• Built-in overcurrent protection circuit limits output current to prevent damage.
• Integrated ON/OFF control pin enables significant power reduction in standby mode.
• Compatible with small ceramic capacitors for stable operation.

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

• Power supply for battery-powered devices
• Power supply for personal communication devices
• Power supply for home electric appliances

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

Verify the specific package type (SOT-89-5) and environmental code (U for lead-free/halogen-free) against project requirements. Confirm that the ON/OFF pin logic matches the system design, as this variant utilizes positive logic. Ensure adequate thermal management is planned if operating near maximum load currents due to package power dissipation constraints.

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

Select this component when a fixed 2.8 V rail is required with high efficiency and low static current. The SOT-89-5 package offers a balance between thermal performance and board space compared to smaller packages. Verify that the application load does not exceed the 300 mA limit while respecting the junction temperature and power dissipation ratings under worst-case ambient conditions.

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

This part belongs to the S-1132 Series of CMOS voltage regulators designed for mobile and portable applications. The series features low dropout characteristics and high ripple rejection. The 'B' designation indicates positive logic for the ON/OFF pin, while 'U5T1' specifies the SOT-89-5 tape-and-reel packaging configuration.

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

Direct substitutes within the same series include other S-1132 variants with different output voltages or packages, such as S-1132Bxx-U5T1x. Cross-family replacements require matching input/output voltage ranges, current capabilities, and package footprints.

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

How does the ON/OFF pin function on this specific model?

The 'B' suffix indicates positive logic. The regulator operates when the ON/OFF pin is at a high level and stops operation when the pin is at a low level.

What are the capacitor requirements for stability?

Both input and output capacitors should be 0.1 μF or more. Ceramic capacitors are recommended, and the equivalent series resistance (ESR) of the output capacitor must be 2.0 Ω or less.