RP114N331D-TR-FE - 300mA, 3.3V CMOS LDO | Nisshinbo
MPN： RP114N331D-TR-FE ✓ 啟用中RP114N331D-TR-FE 概覽
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally higher than the desired output. In the broader power-management taxonomy, LDOs sit alongside DC-DC converters as the final stage that delivers clean, low-noise rails to noise-sensitive loads such as microcontrollers, sensors, and RF blocks, with the trade-off of lower efficiency at large VIN-VOUT deltas.
Key features highlighted in the manufacturer literature include a minimum input voltage of 1.4V, a supply current of approximately 50 µA, CMOS process construction, and a fixed 3.3V output for this variant. The SOT-23-5 footprint keeps board area small while exposing an enable input and the required input/output capacitors for stable operation. Per the Nisshinbo Micro Devices product page, the RP114 series targets low-voltage, low-power applications that demand tight output tolerance with a compact footprint.
The CMOS implementation provides low quiescent current for battery-operated designs, while the 300 mA rating is sufficient for low-power MCUs, Bluetooth Low Energy radios, sensor hubs, and other portable subsystems. The fixed 3.3V option is commonly paired with 1.8V-core processors and 3.3V peripherals, simplifying BOM by eliminating external feedback resistors.
Typical applications include IoT sensor nodes, wearable electronics, portable instrumentation, microcontroller power rails, and wireless module supplies where a small footprint and low quiescent current are prioritized. Choose this part when a compact, fixed 3.3V LDO with low standby current is needed in a SOT-23-5 footprint.
When designing with this device, ensure input and output capacitors meet the ESR and value requirements in the datasheet to guarantee stability. Place the input capacitor close to VIN and the output capacitor close to VOUT to minimize parasitic loop area and high-frequency ringing.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 RP114N331D-TR-FE — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： RP114N331D-TR-FE （相同外形與佔位） — 差異在於 Manufacturer.
RP114N331B-TR-FE
✅ 直接替換📋 參考替代品（不在目錄中）
RP114N281D-TR-FE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
S-1312A33H-M5T1U3
✅ 直接替換📋 參考替代品（不在目錄中）
ADP1710AUJZ-3.3
✅ 直接替換📋 參考替代品（不在目錄中）
RT9013-32GB
✅ 直接替換📋 參考替代品（不在目錄中）
RP114N331D-TR-FE 最大額定值與電氣特性
| Manufacturer | Nisshinbo Micro Devices (formerly Ricoh Electronic Devices) |
| Part Family | RP114 Series |
| Regulator Topology | LDO (Low-Dropout) Linear Regulator |
| Process Technology | CMOS |
| 輸出類型 | Fixed |
| Output Voltage (nominal) | 3.3 V |
| Output Voltage Range (family) | 0.8 V to 3.6 V (0.1 V step) |
| 最大輸出電流 | 300 mA |
| Minimum Input Voltage | 1.4 V |
| Supply Current (typ.) | 50 µA |
| 輸出數量 | 1 |
| 封裝 | SOT-23-5 |
| Packaging | Tape & Reel (-TR-FE) |
| 安裝類型 | Surface Mount |
| 無鹵素 | Compliant |
| ECCN | EAR99 |
| RoHS 狀態 | Compliant |
RP114N331D-TR-FE 腳位配置
| 腳位 1 | VIN — Input supply voltage |
| 腳位 2 | GND — Ground |
| 腳位 3 | EN — Enable (active high) |
| 腳位 4 | NC — Not connected (per datasheet) |
| 腳位 5 | VOUT — Regulated 3.3V output |
典型應用
RP114N331D-TR-FE 適用於 6 應用s: IoT Sensor Node Power Rail, Wearable Device Power Supply, Microcontroller Power Rail, Portable Instrumentation, Wireless Module Supply, Industrial Sensor Hub.
IoT Sensor Node Power Rail
The RP114N331D-TR-FE's 50 µA quiescent current and 1.4V minimum input make it ideal for battery-powered IoT sensor nodes that spend most of their time in deep sleep. Its 3.3V fixed output feeds directly to BLE SoCs and digital sensors. Placed between a CR2032 coin cell or single-cell Li-poly battery and the sensor load, it provides clean regulated voltage without burning standby budget, unlike higher-IQ LDOs. The SOT-23-5 footprint suits ultra-compact sensor modules.
推薦
Wearable Device Power Supply
Wearables demand compact regulators with low quiescent current, both delivered by the RP114N331D-TR-FE. Its 3.3V output powers heart-rate sensors, MEMS accelerometers, and BLE radios in fitness bands and smartwatches. Compared to switching regulators, this LDO adds no high-frequency switching noise that could couple into analog sensor signal chains. The 300 mA current envelope handles pulsed BLE transmit peaks while the SOT-23-5 keeps PCB area minimal.
推薦
Microcontroller Power Rail
Many low-power microcontrollers require a clean 3.3V supply and the RP114N331D-TR-FE is tailored for exactly this role. Its 1.4V minimum input enables powering directly from USB-derived 5V after a small resistive drop, or from a single Li-ion cell at 3.7V nominal. The 300 mA rating covers most MCU plus peripheral combinations. Designers can rely on the LDO to filter switching noise from upstream buck converters in mixed-rail designs.
推薦
Portable Instrumentation
Handheld test instruments and data loggers benefit from the RP114N331D-TR-FE's small footprint and low standby drain. Its fixed 3.3V output can power analog front-ends, ADCs, and display drivers in portable multimeters and environmental monitors. Compared to discrete regulator designs, the integrated CMOS LDO reduces BOM count and PCB complexity. The SOT-23-5 package allows placement adjacent to the load for tight, low-noise power delivery.
推薦
Wireless Module Supply
Sub-GHz and 2.4 GHz wireless modules (LoRa, Zigbee, BLE) commonly operate from 3.3V, and the RP114N331D-TR-FE is well-matched to these loads. The 300 mA continuous rating supports transmit bursts while the low-IQ design preserves battery life in remote sensor networks. The LDO's clean output minimizes spurious emissions that could otherwise couple into antenna circuits. The SOT-23-5 footprint allows mounting the regulator next to the module's power pin.
推薦
Industrial Sensor Hub
Industrial sensor hubs require a rugged, low-power 3.3V rail for measurement nodes. The RP114N331D-TR-FE's CMOS construction and industrial temperature rating support factory-floor deployments. Its 50 µA IQ minimizes waste heat in densely packed control cabinets, while the 300 mA output can drive analog front-ends, isolators, and digital interfaces. Compared to higher-IQ alternatives, this LDO keeps thermal management simple in sealed enclosures.
推薦
推薦產品摘要
工程參考資料，適用於 RP114N331D-TR-FE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | RP114N331B-TR-FE | RP114N281D-TR-FE | S-1312A33H-M5T1U3 | ADP1710AUJZ-3.3 | RT9013-32GB |
|---|---|---|---|---|---|---|
| Brand | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices | ABLIC (SII) | Analog Devices | Richtek |
| Package | SOT-23-5 | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Output Voltage | 3.3 V fixed | 3.3 V fixed | 2.8 V fixed | 3.3 V fixed | 3.3 V fixed | 3.2 V fixed |
| Maximum Output Current | 300 mA | 300 mA | 300 mA | 150 mA | 300 mA | 500 mA |
| Process Technology | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS |
| RoHS / Halogen Free | Compliant / Halogen Free | Compliant / Halogen Free | Compliant / Halogen Free | Compliant | Compliant | Compliant |
主要差異化特點
- Ultra-low 50 µA quiescent current (對比ADP1710AUJZ-3.3)
- Lower 1.4V minimum input voltage (對比ADP1710AUJZ-3.3)
- Broader 300 mA output current envelope (對比S-1312A33H-M5T1U3)
設計說明
Estimated: with VIN = 5 V, VOUT = 3.3 V, IOUT = 300 mA, the regulator dissipates approximately (5 - 3.3) × 0.3 = 0.51 W. The SOT-23-5 package has a typical θJA around 200 C/W on a 1-oz 1-square-inch copper pour, yielding roughly 100 C junction temperature rise above ambient. This is well within the 125 C operating limit for moderate ambient temperatures, but designers should provide adequate copper area if operating near maximum ratings.
Place the input capacitor (typically 1 µF ceramic X7R) as close as possible to the VIN pin and the output capacitor (typically 1 µF ceramic X7R) directly at the VOUT pin to minimize parasitic inductance. Use a continuous ground plane beneath the regulator and route VOUT with a wide trace to reduce voltage drop and improve transient response. Avoid routing noisy digital signals across the regulator area to prevent output ripple coupling.
Do not omit the input or output capacitors - the LDO requires them for stable regulation. Do not exceed the absolute maximum input voltage specified in the datasheet. The EN pin should be tied to VIN if enable control is unused, and never left floating. Verify that the chosen output capacitor's ESR falls within the stability range specified by Nisshinbo; ceramic X7R capacitors in the 1 µF to 10 µF range are typically safe choices.
合規資訊
Halogen Free per GlobalSpec datasheet archive entry. RoHS and lead-free status per Nisshinbo Micro Devices product page. Not AEC-Q100 qualified - this part is targeted at consumer and industrial applications, not automotive.
