NJW4107U2-33A-TE1 - 45V 300mA Fast LDO 3.3V Fixed | Nisshinbo
MPN: NJW4107U2-33A-TE1 ✓ Hoạt độngNJW4107U2-33A-TE1 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho NJW4107U2-33A-TE1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với NJW4107U2-33A-TE1 (cùng hình factor và footprint) — khác nhau ở Output Voltage, Package, Protection Features, Regulator Type, RoHS Status.
NJW4107U2-50A-TE1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
NJW4107U2-12A-TE1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
NJW4107U2-33A-T1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
NJW4107U2-18A-TE1
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LP2985-33DBVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
NJW4107U2-33A-TE1 Tỷ lệ tối đa & tính chất điện
| Regulator Type | LDO (Low-Dropout), Positive Fixed |
| Điện áp đầu ra | 3.3 V (fixed) |
| Số lượng đầu ra | 1 |
| Điện áp đầu ra (tối đa) | 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% |
| Nhiệt độ hoạt động | -40 °C to +125 °C |
| On/Off Pin | Yes |
| AEC-Q100 | Grade 1 qualified (T1 specifier) |
| Hộp | SOT-89-5 (U2) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per distributor listings) |
Cấu hình chân NJW4107U2-33A-TE1
| Chân 1 | VIN — Input supply (4.0 V to 40 V) |
| Chân 2 | GND — Ground |
| Chân 3 | ON/OFF — Enable pin (drive high to turn on) |
| Chân 4 | NC — Not connected (per datasheet) |
| Chân 5 | VOUT — Regulated 3.3 V output |
Ứng dụng tiêu biểu
NJW4107U2-33A-TE1 phù hợp cho 7 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho NJW4107U2-33A-TE1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Wide 40 V continuous / 45 V transient VIN (vsLP2985-33DBVR)
- AEC-Q100 Grade 1 qualified option (T1) (vsNJW4107U2-33A-T1)
- Same-footprint output voltage flexibility (vsNJW4107U2-50A-TE1)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
