NJW4107U2-33A-TE1 - 45V 300mA Fast LDO 3.3V Fixed | Nisshinbo
料号： NJW4107U2-33A-TE1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.18 | $11.80 |
| 100 | $0.95 | $95.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.71 | $710.00 |
NJW4107U2-33A-TE1 概述
What is an LDO (Low-Dropout) linear regulator? An LDO is a class of linear voltage regulator that maintains a regulated output voltage even when the input voltage is only marginally higher than the output - the minimum differential is the "dropout voltage." LDOs sit within the broader taxonomy of linear regulators, then voltage regulators, then power-management ICs in the semiconductor hierarchy. Unlike switching regulators, LDOs introduce no switching noise but dissipate VIN-VOUT times IOUT as heat, so they are favored for noise-sensitive analog and RF rails where clean supply is more important than efficiency.
Key features include a wide 4.0 V to 40 V operating input range (transient-tolerant to 45 V), a 300 mA continuous load capability, an On/Off (enable) pin for power sequencing, internal current limit and thermal shutdown, and a low quiescent current optimized for always-on standby rails. The fast transient response specification is the headline differentiator over general-purpose LDOs.
Internally, the device combines a high-side P-channel pass element with a precision bandgap reference and error amplifier. The architecture achieves fast line/load transient response by minimizing the dominant pole at the pass transistor gate, allowing the output to recover quickly from load steps - critical for digital logic rails that draw large dynamic currents.
Typical applications include automotive body electronics and sensor rails, industrial PLC I/O and 24 V-bus post-regulation, battery-powered portable equipment, and 12 V/24 V industrial sensor power. Designers choose the NJW4107U2 family when a wide VIN, fixed output, and fast transient response are required in a small SOT-89-5 footprint.
When designing with this part, place input and output ceramic capacitors as close to the pins as possible, respect the SOA at high VIN-VOUT differentials (derate at elevated Ta), and use the On/Off pin for power sequencing in multi-rail systems. The exposed die-pad of the device (L2 suffix variants) further improves thermal dissipation versus standard SOT-89-5.
This page synthesizes distributor pricing, drop-in alternative coverage, and practical design notes not found in the manufacturer datasheet alone, giving engineers a faster path from MPN selection to qualified BOM.
直接替换替代料： NJW4107U2-33A-TE1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： NJW4107U2-33A-TE1 （相同外形与封装尺寸） ——差异在于 Output Voltage, Package, Protection Features, Regulator Type, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
NJW4107U2-50A-TE1
✅ 直接替换📋 参考替代料（不在目录中）
NJW4107U2-12A-TE1
✅ 直接替换📋 参考替代料（不在目录中）
NJW4107U2-33A-T1
✅ 直接替换📋 参考替代料（不在目录中）
NJW4107U2-18A-TE1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LP2985-33DBVR
✅ 直接替换📋 参考替代料（不在目录中）
NJW4107U2-33A-TE1 最大额定值与电气特性
| Regulator Type | LDO (Low-Dropout), Positive Fixed |
| 输出电压 | 3.3 V (fixed) |
| 输出数量 | 1 |
| 输出电流（最大） | 300 mA |
| Input Voltage Range (Operating) | 4.0 V to 40 V |
| Input Voltage Rating (Transient) | 45 V |
| Output Voltage Accuracy (Ta=25 °C) | ±1.0% |
| Output Voltage Accuracy (Ta=-40 °C to +125 °C) | ±1.5% |
| 工作温度 | -40 °C to +125 °C |
| On/Off Pin | Yes |
| AEC-Q100 | Grade 1 qualified (T1 specifier) |
| 封装 | SOT-89-5 (U2) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (per distributor listings) |
NJW4107U2-33A-TE1 引脚配置
| 引脚 1 | VIN — Input supply (4.0 V to 40 V) |
| 引脚 2 | GND — Ground |
| 引脚 3 | ON/OFF — Enable pin (drive high to turn on) |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | VOUT — Regulated 3.3 V output |
典型应用
NJW4107U2-33A-TE1 适用于 7 应用s: Automotive Body Electronics and Sensor Power, 24 V Industrial Bus Post-Regulation, Battery-Powered Portable Equipment, Precision Sensor and Analog Front-End Supply, IoT Edge Node and Smart Sensor Modules, Appliance and White Goods Control Boards, Test and Measurement Instrumentation Rails.
Automotive Body Electronics and Sensor Power
The NJW4107U2-33A-TE1 is purpose-built for 12 V/24 V automotive body and sensor rails thanks to its AEC-Q100 Grade 1 qualification and 4.0 V to 40 V (45 V transient) operating range. It delivers a clean 3.3 V at 300 mA to body controllers, ambient-light sensors, and door-module MCUs without requiring a pre-regulator on the 12 V battery rail. The fast transient response handles the dynamic current steps of processor wake events, keeping the 3.3 V rail within tolerance. Compared with a buck converter, this LDO adds no EMI to the vehicle CAN-bus environment, making it well suited to noise-sensitive sensor analog supplies and infotainment panel logic rails where a small SOT-25 size advantage is ideal.
推荐
24 V Industrial Bus Post-Regulation
In factory-automation PLCs and sensor hubs, the NJW4107U2-33A-TE1 steps a 24 V industrial bus down to a logic-friendly 3.3 V at 300 mA for I/O expanders, isolated digital isolators, and MCU rails. Its 40 V max VIN tolerates 24 V ±20% industrial transients without additional protection, replacing bulkier TO-220 LDOs with a compact SOT-89-5 footprint. The On/Off pin enables sequenced power-up, which is critical when downstream MCUs require deterministic rail timing. Compared to a buck regulator, the LDO produces no high-frequency emissions that could couple into adjacent analog transducer channels - a key consideration in dense PLC backplanes.
推荐
Battery-Powered Portable Equipment
For portable and battery-powered designs, the NJW4107U2-33A-TE1 provides a low-noise 3.3 V rail from a single Li-ion cell (after boost) or a multi-cell NiMH pack. Its On/Off pin supports sleep modes, dropping quiescent current to microamp levels during standby to extend battery life. The 300 mA continuous output is sufficient for low-power MCUs, BLE radios, and small sensor payloads. Compared to higher-current LDOs, the LDO's small SOT-89-5 footprint suits wearables, and its fast wakeup (from On/Off pin) enables aggressive power-gating strategies the day of a battery-state-of-charge cycle.
推荐
Precision Sensor and Analog Front-End Supply
Precision analog front-ends - such as 4-20 mA loop transmitters, load-cell ADCs, and strain-gauge bridges - demand low-noise 3.3 V rails to preserve measurement resolution. The NJW4107U2-33A-TE1's low output noise and fast transient response prevent load steps from the downstream ADC from modulating the analog supply. Its wide VIN lets it run directly from a 12 V or 24 V transducer supply, eliminating a pre-regulator. Compared to a switching supply, the LDO injects no switching ripple into the sensor signal chain - critical when measuring microvolt-level signals in industrial weighing or pressure-sensing applications.
推荐
IoT Edge Node and Smart Sensor Modules
IoT edge nodes and smart-sensor modules - including smart meters, environmental monitors, and wireless sensor endpoints - benefit from the NJW4107U2-33A-TE1's wide-VIN tolerance, On/Off pin, and compact SOT-89-5 footprint. The regulator can run directly from a 12 V/24 V building-automation rail, eliminating a pre-converter and shrinking the BOM. Its fast load transient response ensures stable 3.3 V to the wireless radio (LoRa, Zigbee, Wi-Fi) during TX events that draw pulsed current. Compared to larger TO-220 LDOs, the SOT-25 size advantage allows it to fit in miniature sensor enclosures the day of a smart-building installation.
推荐
Appliance and White Goods Control Boards
Major appliances (washing machines, refrigerators, dishwashers) use 12 V or 24 V logic rails driven by the NJW4107U2-33A-TE1. Its 40 V VIN rating tolerates back-EMF transients from relay and motor coils, while its 300 mA output supports user-interface MCUs, displays, and sensor arrays. AEC-Q100 Grade 1 (T1 variant) qualification supports harsh-temperature under-cabinet environments. Compared to discrete zener + transistor regulators, the integrated LDO gives a tighter 3.3 V tolerance and built-in thermal/short-circuit protection - reducing warranty returns in high-volume white-goods production.
推荐
Test and Measurement Instrumentation Rails
Bench-top test instruments - including multimeters, oscilloscopes, and signal calibrators - require clean 3.3 V rails for ADC reference buffers and display controllers. The NJW4107U2-33A-TE1 provides low-noise post-regulation from a 12 V or 24 V internal bus, with fast transient response to handle ADC conversion bursts. The On/Off pin enables standby/hibernate modes that save power between measurements. Compared to a buck regulator, the LDO adds no high-frequency noise that could degrade sensitive ADC measurements, which is critical for a hand-held DMM measuring microvolt-level inputs.
推荐
推荐产品汇总
工程参考数据： NJW4107U2-33A-TE1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | NJW4107U2-50A-TE1 | NJW4107U2-12A-TE1 | NJW4107U2-33A-T1 | LP2985-33DBVR |
|---|---|---|---|---|---|
| Brand | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Texas Instruments |
| Package | SOT-89-5 (U2) | SOT-89-5 (U2) - same | SOT-89-5 (U2) - same | SOT-89-5 (U2) - same | SOT-23-5 (DBV) - different |
| Output Voltage | 3.3 V | 5.0 V | 1.2 V | 3.3 V | 3.3 V |
| Output Current | 300 mA | 300 mA | 300 mA | 300 mA | 300 mA |
| Input Voltage (Max) | 40 V (45 V transient) | 40 V | 40 V | 40 V | 16 V |
| On/Off Pin | Yes | Yes | Yes | Yes | Yes |
| AEC-Q100 Grade | Grade 1 (T1 specifier only) | Grade 1 (T1 specifier only) | Grade 1 (T1 specifier only) | Grade 1 (qualified by suffix) | Not qualified |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
关键差异点
- Wide 40 V continuous / 45 V transient VIN （对比 LP2985-33DBVR)
- AEC-Q100 Grade 1 qualified option (T1) （对比 NJW4107U2-33A-T1)
- Same-footprint output voltage flexibility （对比 NJW4107U2-50A-TE1)
设计说明
At VIN = 24 V (industrial bus), VOUT = 3.3 V, and full 300 mA load, power dissipation is roughly (24 - 3.3) × 0.3 = 6.2 W. The SOT-89-5 (U2) package has an exposed thermal pad that should be soldered to a copper pour of at least 100 mm² on the top layer, plus thermal vias to the inner/ground planes. Without this, the device will enter thermal shutdown at high ambient temperatures or near full load with VIN > 15 V. Estimated: input 24 V, load 0.3 A, ambient 25 °C, no heatsink - junction temperature rise ≈ 6.2 W × 50 °C/W = 310 °C, which exceeds the 150 °C limit; a copper pour is mandatory.
Place input and output ceramic capacitors as close as possible to the VIN and VOUT pins to minimize parasitic inductance. Use a 1 µF X7R ceramic on the input and a 1 µF X7R ceramic on the output (per Nisshinbo datasheet recommended values); place both within 2 mm of the IC. Add a 0.1 µF decoupling capacitor in parallel with the input cap for high-frequency noise rejection. Keep the ground return path short to avoid ground bounce that could couple into the On/Off pin.
Do not exceed the 45 V transient VIN limit; add a TVS diode (e.g., SMAJ33A or SMBJ40A) on VIN if the input rail shares a connector with inductive loads. The On/Off pin must not be left unconnected - if sequencing is not needed, tie it to VIN through a 100 kΩ resistor to keep the regulator enabled. Avoid routing high-current load traces under the package - the exposed thermal pad requires a continuous copper pour with thermal vias to ground for proper heat extraction.
合规信息
RoHS compliant per distributor listings. AEC-Q100 Grade 1 qualification applies to the T1 specifier; standard TE1 suffix is not automotive-qualified. Halogen-free status not stated in provided data.
