NJW4132U2-A - 40V 1.75A Boost Converter IC | Nisshinbo
料号： NJW4132U2-A ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.27 | $227.00 |
| 500 | $2.04 | $1,020.00 |
| 1,000 | $1.81 | $1,810.00 |
NJW4132U2-A 概述
A boost converter (also called a step-up switching regulator) is a switching power topology that uses an inductor, a power switch, and a rectifier diode to deliver an output voltage higher than the input. The NJW4132U2-A falls within the broader DC-DC switching regulator category (DC-DC > switching regulator > boost converter > PMIC) and is intended for applications where the input must be raised to a higher rail without the heat penalty of a linear regulator. Compared with a linear LDO, a boost converter trades lower efficiency for much smaller size and far less heat dissipation at high VIN-to-VOUT ratios.
Key features include 45V absolute maximum input rating, 1.75A internal MOSFET current capability, high switching frequency that allows the use of small low-ESR MLCC output capacitors, integrated soft-start, cycle-by-cycle overcurrent protection, thermal shutdown, and an enable/shutdown pin for power sequencing. The exposed-pad SOT-89-5/6 footprint keeps the part area minimal while providing adequate thermal dissipation for sub-3W designs on a 1-square-inch copper pour.
Typical applications include driving strings of white LEDs from a 12V or 24V rail, biasing industrial sensors from a 24V PLC supply, generating local 15V or ±12V rails from a single-cell Li-ion pack, and supplying LCD bias generators in point-of-sale and metering equipment. The wide input range also supports USB-PD and automotive 12V battery systems.
When designing with the NJW4132U2-A, place the input capacitor, output capacitor, boost inductor, and catch diode as close to the IC as possible, and follow the manufacturer recommended land pattern to keep switching-node copper area short and quiet. Keep the feedback traces away from the SW node and use the EN pin to control inrush and standby current.
直接替换替代料： NJW4132U2-A ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
NJW4132U2-B-TE2
✅ 直接替换📋 参考替代料（不在目录中）
NJW4132U1-A-TE2
✅ 直接替换📋 参考替代料（不在目录中）
NJW4132U2-A 最大额定值与电气特性
| 拓扑 | Boost (Step-Up) Switching Regulator |
| 输入电压范围 | 4.5 V to 40 V |
| Absolute Maximum Input Voltage | 45 V |
| 输出电压范围 | Adjustable, 1 V to ~38 V |
| Internal Switch Current | 1.75 A |
| Internal Power MOSFET | Integrated, 40 V rating |
| Output Current Capability | Up to 1.75 A (dependent on VIN-VOUT ratio) |
| 反馈电压 | 1 V (adjustable via external resistor divider) |
| 使能引脚 | Yes (active-high, shutdown control) |
| 软启动 | Integrated |
| Protection Features | Cycle-by-cycle overcurrent protection, thermal shutdown |
| 工作温度范围 | -40 C to +125 C |
| 封装 | SOT-89-5/6 (with exposed thermal pad) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
NJW4132U2-A 引脚配置
| 引脚 1 | SW — Switch node - connect to boost inductor |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | FB — Feedback (1V reference) - resistor divider to VOUT |
| 引脚 4 | EN — Enable input (active-high) |
| 引脚 5 | VIN — Input supply (4.5V to 40V) |
典型应用
NJW4132U2-A 适用于 6 应用s: Industrial 24V Sensor Bias Supply, White LED String Driver from 12V Rail, USB-PD / Battery Boost to 12V or 20V Rail, Automotive 12V Body Electronics Boost, LCD Bias Generator for Metering Equipment, IoT Edge Node Local Rail Boost.
Industrial 24V Sensor Bias Supply
The NJW4132U2-A's 40V input and 1.75A switch current let it boost a 24V industrial PLC rail to 30-36V for biasing strain-gauge and pressure sensors that need higher compliance. With 85-93% efficiency in typical 24V-to-30V boost operation, the part dissipates far less heat than a linear regulator would at the same delta, fitting in a sealed sensor housing on a 0.5-1 sq-in copper pour.
推荐
White LED String Driver from 12V Rail
Driving 3-8 series white LEDs from a 12V supply requires stepping up to ~25-30V at 100-350mA per string - exactly the NJW4132U2-A's sweet spot. The 4.5V-40V VIN range tolerates automotive cold-crank and load-dump transients; the high switching frequency lets designers use a small chip inductor plus a single 10uF MLCC, avoiding bulky electrolytics.
推荐
USB-PD / Battery Boost to 12V or 20V Rail
For portable devices that must produce a 12V or 20V rail from a 1S Li-ion (3.0-4.2V) or USB-PD source (5-20V), the NJW4132U2-A's 4.5V-40V VIN and adjustable VOUT make it flexible across charging profiles. The integrated soft-start and cycle-by-cycle current limit protect the battery under hot-plug events, while the EN pin enables load-disconnect for sleep modes.
推荐
Automotive 12V Body Electronics Boost
The NJW4132U2-A's 45V abs-max input covers 12V automotive load-dump per ISO 7637-2, allowing direct connection to the battery rail without an external TVS in many designs. Boosting to 15-18V provides headroom for HVAC actuators, infotainment audio amplifiers, and CAN-bus isolators that need a stable rail above cranking transients. Note the part is not AEC-Q100 qualified.
推荐
LCD Bias Generator for Metering Equipment
LCD panels in electricity meters and POS terminals need +/-15V or +20V bias rails generated from a single 5V or 12V system rail. The NJW4132U2-A produces the positive rail cleanly while the small SOT-89-5/6 footprint fits inside cramped meter enclosures. The 1.75A switch capability supports multi-segment displays without flicker under load steps.
推荐
IoT Edge Node Local Rail Boost
Battery- or PoE-powered IoT gateways often need a 12V or 24V local rail to drive RS-485 transceivers, analog front ends, or sensor excitation. The NJW4132U2-A's EN pin supports sleep-mode current reduction for battery-powered nodes, and the wide VIN window lets the same design run from either 3.6V Li-ion or 12V PoE-derived input.
推荐
推荐产品汇总
工程参考数据： NJW4132U2-A ——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 | NJW4132U2-B-TE2 | NJW4132U1-A-TE2 |
|---|---|---|---|
| Package | SOT-89-5/6 | SOT-89-5/6 - same | SOT-89-5/6 - same |
| Brand | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices |
| Input Voltage Range | 4.5 V to 40 V | 4.5 V to 40 V | 4.5 V to 40 V |
| Absolute Maximum VIN | 45 V | 45 V | 45 V |
| Switch Current | 1.75 A | 2.25 A | 1 A (lower-current variant) |
| Output Voltage Range | Adjustable, 1 V to ~38 V | Adjustable, 1 V to ~38 V | Adjustable, 1 V to ~38 V |
| Enable Pin | Yes (active-high) | Yes (active-high) | Yes (active-high) |
关键差异点
- Higher 1.75A switch current than typical SOT-89-5/6 boost ICs （对比 TPS61040 (typical 0.4-0.5A in SOT-23-5))
- 40V continuous / 45V abs-max input supports industrial 24V buses （对比 NJW4132U1-A-TE2 (lower-current variant))
- Same-package upgrade path via -B variant （对比 NJW4132U2-B-TE2)
设计说明
Place the input bypass capacitor, output capacitor, boost inductor, and catch diode as close to the IC as possible. Keep the SW node copper area minimal and away from the FB trace to avoid noise coupling. Use a 1-square-inch copper pour under the SOT-89-5/6 exposed pad for heat removal; the pad must be soldered to the pour, not floating, to achieve rated thermal performance.
Estimated: at VIN=12V, VOUT=24V, IOUT=0.5A continuous, the NJW4132U2-A dissipates approximately P = (VOUT/VIN - 1) * VOUT/eta * IOUT -> roughly 0.7W at 90% efficiency. The SOT-89-5/6 with a 1-sq-in copper pour has theta_JA around 50 C/W, so junction temperature rises ~35 C above ambient - acceptable in most industrial environments. Continuous loads above 1A need a larger copper pour or airflow.
Do not exceed the 45V absolute maximum on VIN, even during transient events - add a TVS or input clamp if the source is a long cable or inductive load. The feedback resistors should use 1% tolerance or better to keep output voltage accuracy; choose RFB-top in the 10-100 kohm range to balance quiescent-current loss against noise pickup. Never leave the EN pin floating - tie it to VIN through a 100 kohm resistor or drive it with the system MCU.
合规信息
RoHS compliant per Nisshinbo product page. Not AEC-Q100 qualified - select AEC-Q100 boost IC for automotive. REACH compliance assumed by EU distribution; halogen-free status not explicitly stated.
