RP115H121B-T1-FE

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

The RP115H121B-T1-FE is a CMOS-based positive voltage regulator from the RP115x series, manufactured by Nisshinbo Micro Devices. It provides a fixed output voltage of 1.2 V with a maximum output current of 1.0 A. The device operates within an input voltage range of 1.4 V to 5.25 V and features a typical dropout voltage of 0.235 V at full load. It includes built-in protections such as short-circuit current limiting, thermal shutdown, and reverse current protection. The component is housed in a SOT-89-5 package and supports an operating temperature range of -40°C to +85°C.

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

• Integrates reverse current protection circuitry to prevent backflow when output voltage exceeds input voltage.
• Includes thermal shutdown and peak current limit circuits for enhanced operational safety under fault conditions.
• Features a constant slope start-up circuit to suppress inrush current during power-on sequences.

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

• Portable communication equipment
• Battery-powered devices
• Cameras and camcorders

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

Verify the specific ordering suffix B indicates active-high chip enable without auto-discharge functionality. Confirm the SOT-89-5 package designation matches the required board layout constraints. Ensure the fixed 1.0 A output current rating aligns with the system's peak load requirements. Check RoHS compliance status if environmental regulations apply to the final assembly.

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

Select this variant for applications requiring a fixed 1.2 V output with high current capability in a compact surface-mount package. The absence of an LCON pin distinguishes it from the RP115L series, fixing the current limit at 1.0 A. Consider the thermal dissipation capabilities of the SOT-89-5 package when designing for high ambient temperatures or continuous full-load operation.

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

This component belongs to the RP115x series of low-dropout regulators designed for low on-resistance and high ripple rejection. The RP115H variant specifically utilizes the SOT-89-5 package, which is optimized for higher power applications compared to the DFN1216-8 package used in the RP115L series. The series is engineered for mobile communication equipment due to its excellent transient response characteristics.

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

Direct substitutes within the same family include other RP115Hxx1B-T1-FE variants with different fixed output voltages. For dual-package options, the RP115Lxx1B-E2 offers similar electrical performance but requires management of the LCON pin for current limit selection.