NJM2882F05-TE1 - 300mA LDO Regulator, 5V Fixed, SOT-23-5
MPN： NJM2882F05-TE1 ✓ 啟用中NJM2882F05-TE1 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 above the output. Within the broader power management hierarchy, an LDO sits beneath DC-DC converters and standard linear regulators, providing cleaner, lower-noise rails at the cost of dissipating (VIN - VOUT) × IOUT as heat. The NJM2882 belongs to the LDO family, itself a sub-category of linear regulators and ultimately of power management ICs.
Key features include a typical dropout of 180 mV at 100 mA, a low 1.0 µF output capacitor requirement for stability, and a quiescent current of 180 µA. The fixed +5.0 V output eliminates external resistor dividers, simplifying BOM and layout, while the active-high enable pin supports power sequencing and standby modes. Advanced bipolar technology achieves the combination of low noise and high PSRR demanded by handheld and portable equipment.
The bipolar process architecture trades slightly higher quiescent current versus CMOS LDOs for superior noise and ripple rejection at audio frequencies. Combined with a 300 mA load capability in a 2.8 × 2.9 mm MTP-5 footprint, the device is well-suited for space-constrained designs where clean power is mandatory and PCB real estate is at a premium.
Typical applications include portable consumer electronics, USB-powered peripherals, audio codec and headphone amplifier rails, microcontroller supply in battery chargers, and industrial sensor modules. Any system requiring a clean 5 V rail from a higher-voltage source such as a Li-ion cell, 9 V wall adapter, or 12 V bus is a strong candidate for the NJM2882.
When designing with this part, ensure the input voltage remains above the dropout threshold plus 5 V across all load and line transients, and use a low-ESR 1.0 µF or greater ceramic capacitor on the output within a few millimetres of the VOUT pin for stable regulation.
This page synthesizes distributor pricing, drop-in alternatives within the SOT-23-5 footprint, and practical design notes drawn from the Nisshinbo datasheet - information not consolidated on the manufacturer product page alone.
直接替換替代品，適用於 NJM2882F05-TE1 — 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。
NJM2882F33-TE1
✅ 直接替換📋 參考替代品（不在目錄中）
NJM2882F18-TE1
✅ 直接替換📋 參考替代品（不在目錄中）
NJM2882F25-TE1
✅ 直接替換📋 參考替代品（不在目錄中）
LP2985-50DBVR
✅ 直接替換📋 參考替代品（不在目錄中）
MCP1825S-5002E/DB
✅ 直接替換📋 參考替代品（不在目錄中）
TLV1117-50CKVURG3
✅ 直接替換📋 參考替代品（不在目錄中）
NJM2882F05-TE1 最大額定值與電氣特性
| 輸出類型 | Fixed Positive |
| 輸出電壓 | 5.0 V |
| 最大輸出電流 | 300 mA |
| 輸入電壓範圍 | Up to 14 V |
| 壓降電壓 | 180 mV (typ) at 100 mA |
| 輸出雜訊 | 30 µVrms |
| PSRR | 75 dB at 1 kHz |
| 靜態電流 | 180 µA |
| Output Capacitor | 1.0 µF (low-ESR ceramic compatible) |
| Power Dissipation | 350 mW |
| 工作溫度 | -40°C to +85°C (Ta) |
| 封裝 | SOT-23-5 (MTP5), 2.8 x 2.9 mm |
| 安裝類型 | Surface Mount |
| Protection Features | Over-Temperature, Short-Circuit, Current Limit |
| Enable Control | Yes (ON/OFF pin, active-high) |
| RoHS 狀態 | Compliant |
NJM2882F05-TE1 腳位配置
| 腳位 1 | VIN — Input voltage supply |
| 腳位 2 | GND — Ground |
| 腳位 3 | EN — Enable (active-high ON/OFF control) |
| 腳位 4 | NC — Not connected (per datasheet) |
| 腳位 5 | VOUT — Regulated +5.0 V output |
典型應用
NJM2882F05-TE1 適用於 6 應用s: Portable Consumer Electronics, Audio Codec and Headphone Amplifier Rails, USB-Powered Peripherals, Industrial Sensor Modules, Microcontroller Supply in Battery Chargers, Wireless IoT Sensor Nodes.
Portable Consumer Electronics
The NJM2882F05-TE1's 300 mA load capability and fixed +5.0 V output make it ideal for powering MCU cores, BLE radios, and display drivers in handheld devices. Its 180 µA quiescent current extends battery life in standby, while the 30 µVrms output noise prevents interference with sensitive analog blocks. The 14 V input range safely accepts a single-cell Li-ion (4.2 V max) plus margin, and the SOT-23-5 footprint fits easily inside space-constrained enclosures.
推薦
Audio Codec and Headphone Amplifier Rails
The NJM2882F05-TE1 delivers 30 µVrms output noise and 75 dB PSRR at 1 kHz, parameters that directly determine the audio dynamic range of downstream codecs and headphone amplifiers. By providing a clean +5 V rail from a USB-injected 5 V input, the regulator eliminates switching noise that would otherwise appear as audible hum. The 300 mA capacity supports typical Class-AB headphone amplifier bias plus codec analog supply simultaneously.
推薦
USB-Powered Peripherals
USB 2.0 delivers a regulated +5 V at up to 500 mA, and the NJM2882F05-TE1 can be inserted downstream to provide a post-filtered, ultra-low-noise rail for sensitive analog blocks. With 75 dB PSRR at 1 kHz, the regulator cleans up USB-bus noise that would otherwise couple into ADC references or sensor bias networks. The enable pin also allows the design to implement USB-suspend current compliance by shutting down the LDO when the host signals suspend.
推薦
Industrial Sensor Modules
Industrial 24 V bus systems and 12 V battery stacks can be stepped down to a clean +5 V rail by the NJM2882F05-TE1 for powering analog front-ends and ADCs. The 14 V maximum input handles transients on industrial buses, while the 75 dB PSRR rejects switch-mode ripple from upstream converters. The -40°C to +85°C operating range and integrated over-temperature/short-circuit protection ensure reliability in factory automation and outdoor sensor deployments.
推薦
Microcontroller Supply in Battery Chargers
Battery charger ICs that require a 5 V bias for internal MOSFET drivers and status logic benefit from the NJM2882F05-TE1's combination of high PSRR and low noise. Drawing from a 9-12 V wall adapter, the LDO provides a stable +5 V to the charger IC's VCC pin, isolating the charger's analog blocks from input ripple. The 300 mA rating easily covers the charger's housekeeping load plus any auxiliary indicators or communication interfaces.
推薦
Wireless IoT Sensor Nodes
Battery-powered IoT nodes combining an MCU, sensor, and sub-GHz or BLE radio benefit from the NJM2882F05-TE1's low quiescent current (180 µA) and active-high enable for duty-cycled operation. The 5 V rail can power a 3.3 V LDO downstream or directly drive sensors with 5 V interfaces. With 30 µVrms output noise and 75 dB PSRR, the regulator maintains a clean supply for the sensor's analog front-end, improving measurement accuracy in low-power wireless designs.
推薦
推薦產品摘要
工程參考資料，適用於 NJM2882F05-TE1 — 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 | NJM2882F33-TE1 | NJM2882F18-TE1 | LP2985-50DBVR | MCP1825S-5002E/DB |
|---|---|---|---|---|---|
| Package | SOT-23-5 (MTP5) | SOT-23-5 (MTP5) - same | SOT-23-5 (MTP5) - same | SOT-23-5 (DBV) - same footprint | SOT-23-5 (DB) - same footprint |
| Brand | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Texas Instruments | Microchip Technology |
| Output Voltage | 5.0 V | 3.3 V | 1.8 V | 5.0 V | 5.0 V |
| Output Current | 300 mA | 300 mA | 300 mA | 150 mA | 500 mA |
| Dropout Voltage (typ @100mA) | 180 mV | 180 mV | 180 mV | 280 mV | 210 mV |
| PSRR at 1 kHz | 75 dB | 75 dB | 75 dB | 45 dB | 60 dB |
| Quiescent Current | 180 µA | 180 µA | 180 µA | 850 µA | 120 µA |
| Enable Pin | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) |
主要差異化特點
- High PSRR at audio band (對比LP2985-50DBVR)
- Lower quiescent current (對比LP2985-50DBVR)
- Higher output current capability than nearest TI competitor (對比LP2985-50DBVR)
設計說明
Estimated: at VIN=9 V, VOUT=5 V, and 200 mA load, the NJM2882F05-TE1 dissipates approximately (9 - 5) × 0.2 = 0.8 W. With a SOT-23-5 theta_JA of approximately 250 °C/W on a standard 1 oz 4-layer JEDEC board, junction temperature rises about 200 °C above ambient - well above the 150 °C thermal-shutdown threshold. For continuous loads above 150 mA at high VIN, reduce VIN closer to VOUT or add thermal copper pours on the PCB.
Place the 1.0 µF low-ESR ceramic output capacitor within 2-3 mm of the VOUT pin, with a short, wide ground return. Input capacitor of 0.1 µF minimum should be placed close to VIN. Use X5R or X7R ceramic dielectrics to maintain capacitance versus bias voltage and temperature. The exposed copper pad underneath the SOT-23-5 should be tied to GND to maximize heat dissipation and reduce ground bounce.
Do not exceed 14 V on VIN - the NJM2882 has no overvoltage lockout and will be damaged by transients above the abs-max rating. If the upstream source is a 12 V industrial supply, include a TVS diode or input clamp. Also avoid leaving the EN pin floating - it must be driven high or low; a floating EN pin can cause unpredictable startup behavior. Finally, ensure output capacitor ESR stays below 500 mΩ to prevent regulator instability.
合規資訊
RoHS compliance confirmed in JLCPCB listing (ROHS badge). AEC-Q100 not applicable for consumer-grade LDO.
