R1515H030B-T1-FE - 36V 50mA LDO Regulator 3.0V Fixed SOT-89-5 | Nisshinbo
MPN： R1515H030B-T1-FE ✓ 啟用中R1515H030B-T1-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 output voltage. The LDO belongs to the broader category of linear regulators, which in turn belong to the family of voltage regulators that form one of the most common building blocks in power management ICs. CMOS-based LDOs such as the R1515 series draw exceptionally low quiescent current from the source, making them ideal for battery-powered or always-on industrial sensor applications.
Key features include a wide 36 V maximum input tolerance for direct operation from industrial 24 V buses, low quiescent current enabled by CMOS architecture, built-in thermal shutdown protection, internal short-circuit current limiting, and a fixed output that eliminates external feedback resistors. The 50 mA rated current is sufficient for low-power analog, microcontroller, and sensor bias rails in noisy industrial environments.
The R1515 uses a CMOS pass element with a precision bandgap reference and integrates a fold-back protection circuit and an over-temperature shutdown circuit that disables the output when the junction temperature exceeds the safe limit. Because the part operates from inputs up to 36 V and ambient temperatures from -40 °C to +105 °C, it tolerates regulated and transient 24 V industrial supplies in factory automation, HVAC control, and building-automation modules.
Typical applications include 24 V-to-3.0 V post-regulation for microcontroller cores in PLCs and industrial sensors, 12 V-to-3.0 V bias rails in metering and white-goods subsystems, battery-powered IoT sensor nodes, and as a post-regulator downstream of a switching converter to remove switching ripple from low-current analog supply pins.
Designers should place the input and output capacitors as close to the IC pins as possible and verify thermal performance because the SOT-89-5 package dissipates heat primarily through its large center pad; the drop must be evaluated for each application's worst-case VIN and load combination.
This page synthesizes distributor pricing, pin-compatible alternative candidates, and application-specific design notes that go beyond what is published in the standalone manufacturer datasheet.
直接替換替代品，適用於 R1515H030B-T1-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： R1515H030B-T1-FE （相同外形與佔位） — 差異在於 Output Voltage, Package, RoHS Status, Output Type, Topology.
R1515H033B-T1-FE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R1515H050B-T1-FE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R1515H018B-T1-FE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
NJW4107U2-33A-TE1
✅ 直接替換聯絡詢價
查看資料表 →NJW4181U3-05B
✅ 直接替換✓ 有庫存
$0.39 / 單位
查看資料表 →R1515H030B-T1-FE 最大額定值與電氣特性
| 輸出類型 | Fixed |
| 輸出電壓 | 3.0 V |
| Maximum Input Voltage | 36 V |
| Output Current | 50 mA |
| 拓撲 | LDO (Low Dropout) |
| Technology | CMOS |
| 工作溫度範圍 | -40 °C to +105 °C |
| 輸出數量 | 1 |
| Output Polarity | Positive |
| 封裝 | SOT-89-5 |
| 安裝類型 | Surface Mount |
| Protection Features | Over Temperature Protection, Short-Circuit Protection |
| RoHS 狀態 | Compliant |
| Terminal Finish | Lead-free (FE) |
| Tape and Reel Qty | 1000 (T1) |
R1515H030B-T1-FE 腳位配置
| 腳位 1 | IN — Input voltage supply (up to 36 V) |
| 腳位 2 | GND — Common ground reference |
| 腳位 3 | NC — Not connected (per datasheet) |
| 腳位 4 | OUT — Regulated 3.0 V output |
| 腳位 5 | NC — Not connected (per datasheet) |
典型應用
R1515H030B-T1-FE 適用於 7 應用s: 24 V Industrial Sensor Bias, Battery-Powered IoT Sensor Node, PLD / MCU Core Rail after DC-DC, Automotive Body and Accessory Modules, Metering and White-Goods Display Bias, Post-Regulator after Switching Converter, HVAC and Building-Automation Subsystems.
24 V Industrial Sensor Bias
The R1515H030B-T1-FE accepts up to 36 V on its input pin and delivers a regulated 3.0 V at up to 50 mA, making it well-suited to bias 3.0 V analog and digital sensors from a 24 V industrial bus. With an operating temperature range of -40 °C to +105 °C, it tolerates factory-floor environments. Place a 1 µF ceramic bypass close to IN and a 1 µF ceramic capacitor on OUT; thermal performance should be checked at maximum VIN and load because the SOT-89-5 dissipates heat through the PCB copper pad.
推薦
Battery-Powered IoT Sensor Node
The CMOS pass element of the R1515H030B-T1-FE keeps quiescent current low, extending battery life in IoT sensor nodes that spend most of their cycle in deep sleep. The fixed 3.0 V output is suitable for many low-power MCUs and analog front-ends. With the 36 V input rating the regulator can be fed directly from a lithium-thionyl-chloride pack or a small boost converter. Thermal shutdown protects the node from over-dissipation, and the SOT-89-5 occupies less than 12 mm² of board area.
推薦
PLD / MCU Core Rail after DC-DC
Downstream of a switching buck regulator, the R1515H030B-T1-FE cleans switching ripple and supplies a stable 3.0 V rail to PLDs, MCUs, and FPGAs that demand low-noise power. Because the regulator is post-DC-DC, its 36 V input tolerance covers most downstream systems after the main converter has already stepped the bus down. The SOT-89-5 footprint is small enough to fit beside a PLD's supply pin pair, and thermal shutdown prevents latch-up during fault events.
推薦
Automotive Body and Accessory Modules
Inside accessory modules inside passenger compartments (window lift, seat controller, mirror) the R1515H030B-T1-FE accepts 12 V nominal inputs up to 36 V transient and gives a stable 3.0 V rail for sub-MCUs. Its thermal shutdown and short-circuit fold-back protect the body harness during fault conditions. The SOT-89-5 dissipates roughly 0.5 W into a 1 cm² copper pad at VIN = 12 V / IOUT = 50 mA which is within typical thermal limits for the body environment.
推薦
Metering and White-Goods Display Bias
A 3.0 V reference bias for LCD segments and metering ADCs can be delivered by the R1515H030B-T1-FE directly from a 5 V or 12 V white-goods rail. Its CMOS architecture holds quiescent current to a minimum so the bias rail does not raise standby power. The SOT-89-5 footprint enables placement behind the display module without a heatsink, and the wide input range handles rectified-mains coupling that may appear on the rail.
推薦
Post-Regulator after Switching Converter
For noise-sensitive analog sections the R1515H030B-T1-FE works as a low-noise post-regulator downstream of a switching converter, taking the already-reduced 5 V or 12 V rail and finalizing it to 3.0 V with low quiescent current and integrated protection. This hybrid topology achieves high efficiency upstream and clean analog supply downstream without a complex LDO plus capacitor network. The SOT-89-5 footprint is compatible with most analog supply layouts.
推薦
HVAC and Building-Automation Subsystems
Building-automation sensor modules powered by 24 V thermostats and HVAC controllers can use the R1515H030B-T1-FE to derive a stable 3.0 V micro-rail for digital temperature and humidity ICs. The 36 V maximum input tolerates the long inductive transients typically coupled into HVAC wiring. The SOT-89-5 package sits comfortably alongside connector sockets and is rated for the -40 °C to +105 °C temperature band required by outdoor mounted equipment.
推薦
推薦產品摘要
工程參考資料，適用於 R1515H030B-T1-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 | R1515H033B-T1-FE | R1515H050B-T1-FE | R1515H018B-T1-FE | NJW4107U2-33A-TE1 | NJW4181U3-05B |
|---|---|---|---|---|---|---|
| Package | SOT-89-5 | SOT-89-5 - same | SOT-89-5 - same | SOT-89-5 - same | SOT-89-5 - same | SOT-89-5 - same |
| Brand | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices (NJR) | Nisshinbo Micro Devices (NJR) |
| Output Voltage | 3.0 V | 3.3 V | 5.0 V | 1.8 V | 3.3 V | 5.0 V |
| Maximum Output Current | 50 mA | 50 mA | 50 mA | 50 mA | 100 mA | 100 mA |
| Topology | CMOS LDO | CMOS LDO | CMOS LDO | CMOS LDO | CMOS LDO | CMOS LDO |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
主要差異化特點
- Wide 36 V maximum input voltage in a small SOT-89-5 package (對比NJW4107U2-33A-TE1)
- CMOS low-Iq architecture for battery-backed sensor nodes (對比R1515H050B-T1-FE)
- Integrated thermal shutdown and short-circuit fold-back protection (對比NJW4181U3-05B)
設計說明
The R1515H030B-T1-FE is supplied in SOT-89-5 which dissipates heat primarily through the center thermal pad to the PCB copper. Estimated: at VIN = 12 V, VOUT = 3.0 V, IOUT = 50 mA, the regulator dissipates (12 - 3.0) × 0.05 = 0.45 W. With a copper-pad junction-to-ambient thermal resistance near 100 °C/W, the die temperature rises about 45 °C above ambient — well within the 125 °C junction limit. For higher VIN or fault-mode sustained overloads, add at least 10 mm × 10 mm of copper to keep Tj below the thermal-shutdown threshold.
Place the input capacitor as close as possible to the IN pin and the output capacitor as close as possible to the OUT pin. Use low-ESR ceramic capacitors of at least 1 µF on both nodes (the manufacturer recommends 1 µF to ensure loop stability). Provide a short direct ground return from the SOT-89-5 thermal pad to the system ground plane.
Do not apply a reverse-polarity voltage to IN — although the R1515x family includes internal protection, sustained reverse polarity can damage the part. Ensure input voltage never exceeds 36 V even during transient. Do not use the part in continuous-output-current above 50 mA because internal fold-back will progressively lower the output voltage and may trigger the thermal-shutdown cycle.
合規資訊
Lead-free terminal finish confirmed by the FE suffix in the part number. Not AEC-Q100 qualified — this part is intended for industrial/consumer use, not automotive safety-critical applications.
