NXP Semiconductors RP115L271D-E2

Overview

RP115L271D-E2 from Ricoh Electronics is a CMOS-based low-dropout linear regulator in DFN1216-8 package, delivering 2.7 V fixed output at up to 1.0 A (LCON = "H") or 500 mA (LCON = "L"), with 0.195 V typical dropout (I_OUT = 1.0 A, V_SET = 1.2 V), ±1.0% output voltage accuracy (V_SET ≥ 1.75 V), and 80 dB ripple rejection at 1 kHz. It serves as a primary power source for battery-powered portable communication equipment requiring stable low-noise voltage regulation.

For engineers reviewing the RP115L271D-E2 datasheet, RP115L271D-E2 pinout, RP115L271D-E2 application, or RP115L271D-E2 equivalent, key selection criteria include its dual-current-limit capability via LCON pin, auto-discharge function (D-suffix), reverse current protection (7.5 µA max), and compatibility with 1.0 µF ceramic output capacitors - all critical for compact, long-life mobile power designs.

Technical Context

The RP115L271D-E2 integrates a P-channel MOSFET pass element with built-in reverse current protection that actively disables conduction when V_OUT > V_IN, using detection offset V_{REV_DET} = 20 mV and release offset V_{REV_REL} = 30–50 mV. Its constant-slope start-up circuit ensures 100 µs typical t_ON, shifting to constant-current mode (300/500 mA inrush limit) if C_OUT demands exceed threshold.

It features dual-mode current limiting: short-circuit protection (60 mA typ. at LCON = "L") and peak current limit (110 mA typ. at LCON = "H"), plus thermal shutdown at 165°C with 110°C hysteresis. The CE pin enables active-high control with 0.5 µA standby current, and the LCON pin allows dynamic selection between 500 mA and 1.0 A output current limits without changing PCB layout.

Key Specifications

Pinout & Package

RP115L271D-E2 uses the DFN1216-8 (1.2 mm × 1.6 mm, 0.4 mm pitch) package with exposed thermal pad (GND-connected substrate). Pin 1–2: V_OUT; Pin 3: LCON (current limit select); Pin 4: V_FB; Pin 5: GND; Pin 6: CE; Pins 7–8: V_DD. The bottom-side thermal tab must be connected to PCB ground plane for thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with XC6210B271MR-G and BD3985FVM-2.7-C, RP115L271D-E2 uniquely combines 1.0 A capability, LCON-selectable current limit, auto-discharge, and 80 dB ripple rejection in a 1.2 × 1.6 mm package - making it optimal for next-gen portable devices demanding both high density and functional safety.

Availability

RP115L271D-E2 is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld scanners, wearable sensor hubs, and smartphone RF front-end power requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for RP115L271D-E2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Ricoh Electronics, Inc. is a Japanese semiconductor manufacturer specializing in power management ICs, optical devices, and imaging solutions for consumer, industrial, and automotive markets.

The RP115x series was designed specifically for space-constrained, battery-powered portable electronics requiring ultra-low quiescent current, high PSRR, and robust protection features - targeting mobile communication equipment and precision analog subsystems.

FAQ

What is the maximum input voltage rating for RP115L271D-E2?

The absolute maximum input voltage (V_IN) for RP115L271D-E2 is 6.0 V. However, the recommended operating input voltage range is 1.4 V to 5.25 V. Operation above 5.25 V is permitted only up to 5.5 V for a cumulative total of 500 hours - exceeding this risks accelerated degradation. This rating ensures safe integration with common Li-ion (4.2 V max) and USB-powered (5.0 V) systems while preserving long-term reliability.

Does RP115L271D-E2 require external feedback resistors for 2.7 V output?

No, RP115L271D-E2 does not require external feedback resistors. It is a fixed-output variant with internal resistor network setting V_OUT = 2.7 V. Pin 4 (V_FB) is internally connected to the output and must be tied directly to V_OUT per the datasheet - no external components are needed. This simplifies PCB layout and eliminates resistor tolerance errors affecting output accuracy.

How does the LCON pin affect RP115L271D-E2 current limiting behavior?

The LCON pin on RP115L271D-E2 selects between two output current limits: logic high ("H") enables 1.0 A peak current limit, while logic low ("L") configures 500 mA. This is implemented via internal current-sense amplifier scaling. During start-up (within t_ON + 60 µs), LCON state must remain stable to avoid transient current disruption. The pin draws only 0.3 µA, making it compatible with weak GPIO drivers.

What is the purpose of the auto-discharge function in RP115L271D-E2?

The auto-discharge function in RP115L271D-E2 rapidly discharges the output capacitor when the CE pin is pulled low, using an internal 60 Ω N-channel transistor. This ensures V_OUT collapses to near 0 V within milliseconds, eliminating residual voltage that could interfere with system reset sequencing or cause unintended peripheral wake-up. It is enabled by the "D" suffix and requires no external components.

Can RP115L271D-E2 operate with a 1.0 µF ceramic output capacitor?

Yes, RP115L271D-E2 is fully stable with a 1.0 µF or larger X5R/X7R ceramic output capacitor (e.g., Murata GRM155R61A105KE15), as confirmed in the datasheet's APPLICATION INFORMATION section. The device includes internal phase compensation optimized for low-ESR ceramics. For 2.7 V operation at temperatures below −20°C, a 2.2 µF capacitor is recommended to maintain stability due to dielectric capacitance loss.