RP131S091D-E2-FE

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

The RP131S091D-E2-FE is a low dropout regulator from the RP131x series manufactured by Nisshinbo Micro Devices. It provides a fixed output voltage of 0.9V with a maximum output current capability of 1A. The device operates within an input voltage range of 1.6V to 6.5V and features a typical supply current of 65µA, reducing to 0.15µA in standby mode via the chip enable function. It utilizes an HSOP-6J package and includes built-in protections such as over-current limit, short-circuit protection, and thermal shutdown.

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

• Integrated auto discharge function that rapidly lowers the output voltage to zero when the chip enable signal transitions from active to standby mode.
• Built-in fold-back protection circuit limits short-circuit current to approximately 250mA to enhance device safety under fault conditions.
• High ripple rejection performance ensures stable operation against input noise variations across the operating frequency range.

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

• Power source for battery-powered equipment
• Power source for portable communication equipment
• Power source for notebook PCs

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

Verify the specific package type and marking code corresponding to the HSOP-6J configuration before finalizing procurement orders. Confirm that the fixed 0.9V output aligns with the target circuit requirements, as this variant does not support adjustable voltage settings. Ensure compliance with RoHS directives and check for any specific halogen-free certifications required by the end application standards.

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

Select this component when a fixed 0.9V rail is required with high current drive capabilities up to 1A. The inclusion of the auto discharge feature makes it suitable for systems requiring rapid power-down sequences. Consider the HSOP-6J package constraints regarding thermal dissipation and board space availability compared to other series options like DFN or SOT-89.

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

This part belongs to the RP131x series of low on-resistance LDO regulators designed for low voltage applications. The 'S' suffix indicates the HSOP-6J package option, while the 'D' suffix denotes the presence of the auto discharge function. The series supports various output voltages from 0.8V to 5.5V in 0.1V steps, catering to diverse digital logic and analog circuit power needs.

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

RP131S091B-E2-FE (identical electrical characteristics without auto discharge function)

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

What is the purpose of the 'D' suffix in the part number?

The 'D' suffix indicates that the IC includes a built-in auto discharge function, which quickly discharges the external output capacitor when the chip is disabled.

How does the chip enable pin affect power consumption?

Driving the CE pin low activates standby mode, reducing the supply current from a typical 65µA to 0.15µA, thereby extending battery life in portable devices.