RP114N331D - 300mA 3.3V LDO Regulator, SOT-23-5 | Ricoh
Teilenummer: RP114N331D ⚠ Letzte Bestellmöglichkeit| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.62 | $0,62 |
| 10 | $0.55 | $5,50 |
| 100 | $0.42 | $42,00 |
| 500 | $0.31 | $155,00 |
| 1.000 | $0.24 | $240,00 |
RP114N331D Übersicht
An LDO (Low-Dropout) linear regulator is a class of voltage regulator that maintains a stable output voltage even when the input-to-output differential is very small — typically a few hundred millivolts. LDOs belong to the broader hierarchy of linear regulators, which in turn fall under voltage regulators and power management ICs (PMICs). Unlike switching regulators, an LDO dissipates the input-output differential as heat, which makes it ideal for low-noise applications but restricts its use to moderate power levels. The RP114N331D's combination of low Iq, small footprint, and integrated CE pin places it firmly in the category of power-management ICs intended for portable and battery-powered systems.
Key features of the RP114N331D include a tight ±1% output voltage accuracy, low dropout voltage suited to single-cell Li-ion sources, internal current limiting, thermal shutdown protection, and an output auto-discharge circuit. The CE input allows direct gating from a microcontroller GPIO for sequenced power-up, while the SOT-23-5 package keeps the PCB footprint under 9 mm² — a critical metric for compact designs. According to the manufacturer datasheet, the regulator's 50 uA typical quiescent current minimizes battery drain in standby.
Architecturally, the RP114N331D uses a P-channel MOSFET pass element, which is the conventional topology for low-dropout positive regulators because it eliminates the need for a charge pump to drive an N-channel device. The integrated voltage reference, error amplifier, and feedback network are trimmed at the wafer stage to achieve the 3.3 V ±1% set-point accuracy without external resistors.
Typical applications include single-cell Li-ion powered wearables, IoT sensor nodes, microcontroller core or I/O rail generation, USB peripheral power, and standby rails in metering or industrial modules. The device is also well suited as a post-regulator following a switching converter to clean up switching noise.
When designing with the RP114N331D, observe the recommended 1.0 uF or greater input and output ceramic capacitors (X7R or X5R dielectric) for stability. Keep the trace from the output to the load short to preserve load-transient performance. Because the device is now flagged with an estimated end-of-life date of 2025 per distributor catalog data, design engineers should confirm long-term supply availability.
This page consolidates distributor pricing, verified pin-compatible alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate component selection and reduce design risk.
Drop-in-Alternativen für RP114N331D – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit RP114N331D (gleiche Bauform und Footprint) – abweichend in Package, Manufacturer, Output Voltage, Regulator Type, RoHS Status.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
RP114N301B-TR-FE
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
R1116N301D-TR-FE
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
RP114N331D-TR-FE
✅ Drop-In✓ Auf Lager
$0.22 / Stück
Datenblatt ansehen →S-1312A34H-M5T1U3
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADP1710AUJZ-3.3
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
RT9013-32GB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
NJW4107U2-33A-TE1
✅ Drop-In✓ Auf Lager
$0.71 / Stück
Datenblatt ansehen →RP114N331D Grenzwerte & elektrische Eigenschaften
| Manufacturer | Ricoh (Nisshinbo Micro Devices Inc.) |
| Part Number | RP114N331D-TR-FE |
| Regulator Type | LDO (Low Dropout) Linear Regulator |
| Ausgangskonfiguration | Fixed Positive |
| Ausgangsspannung | 3.3 V |
| Output Voltage Accuracy | ±1% |
| Maximaler Ausgangsstrom | 300 mA |
| Quiescent Current (Typ.) | 50 uA |
| Enable Input (CE) | Yes, active-high |
| Output Auto-Discharge | Yes (internal) |
| Protection Features | Current limit, thermal shutdown |
| Gehäuse | SOT-23-5 |
| Marking Code | RBB |
| Montageart | Surface Mount |
| Halogenfrei | Compliant |
| RoHS | Compliant |
| Introduction Date | October 20, 2009 |
| Estimated EOL Date | 2025 (per distributor catalog data) |
| ECCN | EAR99 |
RP114N331D Pin-Konfiguration
| Pin 1 | VIN — Input supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | CE — Chip enable (active high) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | VOUT — Regulated output voltage (3.3 V) |
Typische Anwendungen
RP114N331D ist geeignet für 6 Anwendungs: Single-Cell Li-Ion Wearable Power, IoT Sensor Node Power Rail, Microcontroller Core / I/O Rail Generation, USB Peripheral Power Post-Regulation, Industrial Standby / Metering Rail, Low-Noise Analog Sensor Bias.
Single-Cell Li-Ion Wearable Power
The RP114N331D is well matched to single-cell Li-ion wearable designs where the battery voltage (3.0 V to 4.2 V) must be regulated to a clean 3.3 V rail for a microcontroller, BLE radio, or sensor. Its 50 uA typical quiescent current limits standby drain when the wearable is idle, while 300 mA output covers active transmission peaks. Placed directly after a protection FET, the LDO provides a low-noise rail that the switching charger upstream cannot deliver. Designers should size the 1 uF ceramic input/output capacitors with X7R dielectric to preserve load-transient response in a small enclosure.
Empfohlen
IoT Sensor Node Power Rail
In duty-cycled IoT sensor nodes, the RP114N331D's active-high CE pin allows a microcontroller GPIO to gate the regulator between measurements, extending coin-cell life. The internal auto-discharge transistor ensures a deterministic rail collapse at shutdown, preventing residual charge from corrupting the next wake-up. With 300 mA available, the LDO can support brief radio TX bursts from sub-GHz or BLE transceivers. The SOT-23-5 footprint keeps the regulator under 9 mm², leaving room for the antenna and battery in compact sensor packages.
Empfohlen
Microcontroller Core / I/O Rail Generation
The RP114N331D provides a clean 3.3 V rail for low-power microcontrollers such as the PIC24FJ32GA104 or PIC16F1704, replacing a noisy switching regulator output where EMI is a concern. The 300 mA current rating covers the MCU core plus peripherals, while the 50 uA Iq extends sleep-mode runtime. Placing the LDO close to the MCU VDD pins with a 1 uF ceramic output capacitor minimizes ground bounce during GPIO transitions. For designs that already include a 5 V switching stage, the RP114N331D serves as an ideal post-regulator.
Empfohlen
USB Peripheral Power Post-Regulation
When a USB port supplies 5 V to a downstream peripheral, the RP114N331D can post-regulate that rail to 3.3 V for logic, with the VIN-VOUT drop of 1.7 V dissipating roughly 0.5 W at full 300 mA load. Designers must verify SOT-23-5 thermal headroom under continuous full-load conditions or reduce load current. The active-high CE pin can be tied to the USB VBUS detect signal so the rail powers up cleanly when the cable is attached. The internal current-limit protects against short-circuit events on the peripheral board.
Empfohlen
Industrial Standby / Metering Rail
Industrial metering modules often require a 3.3 V standby rail that draws minimal current when the main system is asleep. The RP114N331D's 50 uA Iq supports long standby intervals on battery-backed meters, while its thermal shutdown and current-limit features meet the ruggedness requirements of industrial environments. The fixed 3.3 V output eliminates resistor calibration in production. When paired with an isolated switching front-end, this LDO supplies clean power to an MCU, RTC, and EEPROM for logging intervals.
Empfohlen
Low-Noise Analog Sensor Bias
Precision analog sensors — such as MEMS microphones, strain gauges, and gas sensors — benefit from a low-noise 3.3 V rail that does not inject switching ripple into the signal path. The RP114N331D's linear topology ensures no switching noise, and its tight ±1% output accuracy reduces calibration overhead. With 300 mA available, the regulator can bias multiple sensors simultaneously. The SOT-23-5 package is small enough to place adjacent to the sensor, keeping the analog trace short and improving EMI immunity.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für RP114N331D – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | RP114N301B-TR-FE | R1116N301D-TR-FE | RP114N331D-TR-FE | S-1312A34H-M5T1U3 | ADP1710AUJZ-3.3 | RT9013-32GB | NJW4107U2-33A-TE1 |
|---|---|---|---|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Brand | Ricoh | Ricoh | Ricoh | Ricoh | ABLIC | Analog Devices | Richtek | Nisshinbo |
| Output Voltage | 3.3 V | 3.0 V | 3.0 V | 3.3 V | 3.4 V | 3.3 V | 3.2 V | 3.3 V |
| Maximum Output Current | 300 mA | 300 mA | 150 mA | 300 mA | 150 mA | 150 mA | 500 mA | 100 mA |
| Enable Pin (CE) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) |
| Estimated EOL | 2025 | Active | Active | 2025 | Active | Active | Active | Active |
Wichtigste Unterscheidungsmerkmale
- Lowest quiescent current in this SOT-23-5 LDO class (vs. RT9013-32GB)
- Same-family 3.0 V pin-compatible variant (vs. RP114N301B-TR-FE)
- Integrated auto-discharge transistor (vs. ADP1710AUJZ-3.3)
Designhinweise
Estimated: at VIN=5 V, VOUT=3.3 V, IOUT=300 mA, the RP114N331D dissipates roughly (5 - 3.3) x 0.3 = 0.51 W. With a SOT-23-5 theta_JA of approximately 200 C/W on a 1 oz 4-layer board, the junction temperature rises about 100 C above ambient. For sustained full-load operation, derate to 200 mA or add copper thermal relief. Designers using a 1-cell Li-ion input (3.7 V to 4.2 V) will see dissipation of 0.12 to 0.27 W, well within the SOT-23-5 envelope.
Place the input and output 1 uF X7R ceramic capacitors within 3 mm of the VIN and VOUT pins to keep the high-frequency loop area small. Route the ground return directly to a solid ground plane under the device; do not share the GND trace with switching nodes. Because the part uses an exposed thermal pad area on the bottom of the package, add multiple thermal vias under the land pattern to spread heat into inner copper layers.
Do not leave the CE pin floating — if unused, tie it directly to VIN or a logic GPIO. Floating CE can cause intermittent startup. Confirm the input voltage does not exceed the absolute maximum rating listed in the manufacturer datasheet; the 50 uA Iq assumes CE is properly driven. Also note that the internal output auto-discharge means VOUT will be pulled to ground whenever CE is low, so do not use this LDO in parallel-bypass configurations where a sustained output voltage is required.
When the RP114N331D is used as a post-regulator after a switching converter, place the LDO close to the load and add a small LC filter (10 ohm + 1 uF) at the switching converter output to attenuate switching ripple before it reaches the LDO. The linear regulator will then provide additional PSRR above 10 kHz. For low-noise analog loads such as MEMS microphones, follow the LDO with an RC pi-filter (10 ohm + 10 uF + 10 ohm) to push noise below 50 uVrms.
Compliance-Informationen
Halogen-free and RoHS compliant per distributor catalog data. Not AEC-Q100 qualified — not intended for automotive applications. Conflict-mineral compliance status not stated in the provided data.
