TPSM33615FRDNR - 36V 1.5A Sync Buck Module | Texas Instruments
料号： TPSM33615FRDNR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $3.02 | $1,510.00 |
| 1,000 | $2.69 | $2,690.00 |
TPSM33615FRDNR 概述
A buck converter (step-down switching regulator) is a switching-converter topology that reduces a higher DC input voltage to a lower regulated DC output voltage using an inductor, capacitor, and synchronous MOSFET switches. It sits within the broader power management IC hierarchy: buck converter -> DC-DC converter -> switching regulator -> power management IC. A power module such as the TPSM33615FRDNR integrates the controller, MOSFETs, inductor, and compensation network into one package, simplifying PCB layout and reducing design risk versus discrete buck implementations.
Key features include 1.5-uA quiescent current, 1-MHz fixed switching frequency, programmable output voltage from 1 V to 15 V, and selectable PFM or FPWM light-load operation. The HotRod QFN-FCMOD package reduces parasitic inductance and improves thermal performance. Integrated protections include over-current, over-temperature, under-voltage lockout, automatic fault recovery, and 1% output voltage accuracy across load and line. The integrated inductor and shielding minimize radiated EMI, which is critical for industrial and instrumentation applications that must pass CISPR 25 or CISPR 32.
Technically, the TPSM33615FRDNR uses a peak current-mode control topology with internal compensation, an external RT resistor to program switching frequency, and a MODE pin to select PFM (light-load efficiency) versus FPWM (constant-frequency low-noise) behavior. The HotRod flip-chip QFN package eliminates bond wires, reducing switching-node ringing and DC resistance losses.
Typical applications include industrial 24-V rail point-of-load regulation, factory automation sensors, building automation controllers, low-noise bias supplies for analog front ends, and portable or battery-powered equipment operating from multi-cell lithium packs. The wide 3-V to 36-V input range supports 12-V and 24-V industrial buses directly.
When designing with this device, keep the input capacitors close to VIN and PGND pins to minimize switching-node ringing, and connect the exposed thermal pad to a sufficient ground copper pour. Select PFM mode for highest light-load efficiency, or FPWM when low EMI is the top priority.
This page synthesizes distributor pricing, drop-in alternatives, design notes, and application guidance not found in the manufacturer datasheet alone, giving engineers a single reference for component selection, PCB implementation, and sourcing decisions.
直接替换替代料： TPSM33615FRDNR ——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：
TPSM33615RDNR
✅ 直接替换📋 参考替代料（不在目录中）
TPSM33625FRDNR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPSM33625RDNR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPSM365R6FRDNR
✅ 直接替换📋 参考替代料（不在目录中）
TPSM365R15FRDNR
✅ 直接替换📋 参考替代料（不在目录中）
TPSM33615FRDNR 最大额定值与电气特性
| 拓扑 | Synchronous Buck (Step-Down) Power Module |
| 输入电压范围 | 3 V to 36 V |
| 输出电压范围 | 1 V to 15 V (programmable) |
| 最大输出电流 | 1.5 A |
| 开关频率 | 1 MHz (typ, programmable via RT) |
| 静态电流 | 1.5 uA (typ) |
| 效率 | 88% (typ) |
| Output Voltage Accuracy | ±1% |
| Light-Load Operation | Selectable PFM or FPWM (via MODE pin) |
| 封装 | QFN-FCMOD HotRod (RDN), 11 pins, 3.5 mm x 4.5 mm |
| 工作温度范围 | -40 C to +125 C |
| 安装类型 | Surface Mount |
| Integrated Inductor | Yes (internal) |
| Protections | Over-Current, Over-Temperature, Under-Voltage Lockout, Automatic Fault Recovery |
| RoHS 状态 | Compliant |
TPSM33615FRDNR 引脚配置
| 引脚 1 | VIN — Input voltage supply (3V to 36V) |
| 引脚 2 | PGND — Power ground return |
| 引脚 3 | VIN — Input voltage supply (3V to 36V) |
| 引脚 4 | EN — Enable (active high) |
| 引脚 5 | MODE — PFM/FPWM mode select (FR variant only) |
| 引脚 6 | RT — Switching frequency programming resistor |
| 引脚 7 | FB — Feedback (output voltage sense) |
| 引脚 8 | VOUT — Regulated output voltage |
| 引脚 9 | PGND — Power ground return |
| 引脚 10 | AGND — Analog ground |
| 引脚 11 | PGND — Power ground return (exposed thermal pad) |
典型应用
TPSM33615FRDNR 适用于 6 应用s: Industrial 24V Rail Point-of-Load, Building Automation Controllers, Portable Battery-Powered Equipment, Sensor and Analog Front-End Bias, Motor Control Auxiliary Rails, Automotive 12V Body Electronics.
Industrial 24V Rail Point-of-Load
The TPSM33615FRDNR steps down a 24-V industrial bus rail to logic-level voltages (3.3 V, 5 V, 12 V) for factory automation controllers, PLC I/O modules, and sensor conditioning boards. The 3-V to 36-V input range directly tolerates 24-V nominal with margin for transients, and the integrated inductor simplifies PCB layout in space-constrained DIN-rail enclosures. Compared to discrete buck designs, the module approach reduces EMI risk and shrinks the BOM, while the 88% typical efficiency keeps thermal rise manageable in sealed housings. Recommended companion parts include TI isolation and gate drivers for adjacent high-voltage stages.
推荐
Building Automation Controllers
Building automation systems such as HVAC controllers, smart lighting hubs, and access control panels often require multiple low-voltage rails from a 24-V AC/DC bus. The TPSM33615FRDNR's 1.5-A output, 1.5-uA quiescent current, and PFM light-load mode deliver excellent standby efficiency for always-on systems. The integrated protections (OCP, OTP, UVLO) satisfy UL and IEC safety expectations for building equipment. The 11-pin QFN-FCMOD HotRod package enables compact PCB designs inside wall-mounted enclosures where board area is at a premium.
推荐
Portable Battery-Powered Equipment
The TPSM33615FRDNR suits portable, battery-powered applications including handheld test instruments, two-way radios, and battery-powered sensors powered by 2S-8S lithium-ion packs (6 V to 36 V). The 1.5-uA quiescent current minimizes standby drain, and the 88% peak efficiency extends runtime under load. The HotRod QFN package provides robust thermal performance for handheld enclosures, and the 1-MHz switching frequency keeps the external filter small. The TPSM33615FRDNR's wide input range covers the full discharge curve of multi-cell battery packs without requiring a separate pre-regulator.
推荐
Sensor and Analog Front-End Bias
Precision sensor and analog front-end (AFE) circuits require low-noise, accurate voltage rails to preserve measurement integrity. The TPSM33615FRDNR delivers ±1% output voltage accuracy and selectable FPWM mode for low-noise constant-frequency operation, making it suitable for ADC reference rails, sensor excitation, and instrumentation amplifier supplies. When paired with a downstream low-dropout LDO such as the TPS7A30 or TPS7A47 series, the system achieves both high efficiency and ultra-low noise for sensitive analog signal chains.
推荐
Motor Control Auxiliary Rails
Brushless DC (BLDC) and stepper motor control boards typically require multiple low-voltage rails (3.3 V, 5 V) for microcontroller, gate driver, and communication logic from a 12-V or 24-V power input. The TPSM33615FRDNR's 36-V input tolerance handles motor back-EMF transients on shared bus rails. The integrated inductor and small QFN-FCMOD footprint minimize PCB area near motor driver stages where space is constrained, and the high 1-MHz switching frequency keeps fundamental switching noise above the audible band.
推荐
Automotive 12V Body Electronics
Although not AEC-Q100 qualified, the TPSM33615FRDNR suits non-safety automotive body electronics such as infotainment accessories, interior lighting controllers, and HVAC control modules operating from a 12-V battery bus. The 3-V to 36-V input range covers load-dump transients up to 36 V, while integrated UVLO prevents operation during cold-crank. For AEC-Q100-qualified designs in the same RDN footprint, TI's automotive-grade TPSM365R6-Q1 series is the recommended drop-in alternative.
推荐
推荐产品汇总
工程参考数据： TPSM33615FRDNR ——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 | TPSM33615RDNR | TPSM33625FRDNR | TPSM33625RDNR | TPSM365R6FRDNR | TPSM365R15FRDNR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | QFN-FCMOD HotRod (RDN) 11-pin | QFN-FCMOD HotRod (RDN) 11-pin - same | QFN-FCMOD HotRod (RDN) 11-pin - same | QFN-FCMOD HotRod (RDN) 11-pin - same | QFN-FCMOD HotRod (RDN) 11-pin - same | QFN-FCMOD HotRod (RDN) 11-pin - same |
| Input Voltage Range | 3 V to 36 V | 3 V to 36 V - same | 3 V to 36 V - same | 3 V to 36 V - same | 3 V to 65 V - extended | 3 V to 65 V - extended |
| Maximum Output Current | 1.5 A | 1.5 A - same | 2.5 A - +67% | 2.5 A - +67% | 0.6 A - -60% | 0.15 A - -90% |
| Output Voltage Range | 1 V to 15 V | 1 V to 15 V - same | 1 V to 15 V - same | 1 V to 15 V - same | 1 V to 18 V - extended | 1 V to 18 V - extended |
| Light-Load Mode | Selectable PFM/FPWM (MODE pin) | Fixed PFM - reduced flexibility | Selectable PFM/FPWM - same | Fixed PFM - reduced flexibility | Selectable PFM/FPWM - same | Selectable PFM/FPWM - same |
| Switching Frequency | 1 MHz (RT programmable) | 1 MHz - same | 1 MHz - same | 1 MHz - same | ~1 MHz - similar | ~1 MHz - similar |
关键差异点
- Selectable PFM/FPWM mode via dedicated pin （对比 TPSM33615RDNR)
- Higher output current at same footprint （对比 TPSM365R6FRDNR)
- Wide 36-V input tolerance covers 24-V industrial buses （对比 TPSM365R15FRDNR)
设计说明
The TPSM33615FRDNR's HotRod QFN-FCMOD package achieves low thermal resistance via the exposed thermal pad, but junction temperature still depends on PCB copper area. Estimated: at VIN=24V, VOUT=5V, IOUT=1.5A, power dissipation is roughly (24-5)*1.5/0.88 = 32.4W input minus ~11.5W output = ~3.2W internal loss; with a 1-oz copper pour of 1 sq inch (theta_JA ~35 C/W), junction rise is ~112 C above ambient. For continuous 1.5-A operation at high VIN, larger copper area or airflow is recommended. Keep the thermal pad soldered to a continuous ground plane for optimal heat spreading.
Place the input bypass capacitors as close as possible to the VIN and PGND pins of the TPSM33615FRDNR, using short, wide traces to minimize switching-node parasitic inductance. According to TI's TPSM33615 datasheet, a 1-uF to 10-uF ceramic input capacitor plus a 0.1-uF high-frequency bypass is recommended. The MODE and RT pins are sensitive to noise; route these traces away from the switching node (VOUT/SW). Connect the exposed thermal pad to a solid ground copper pour with multiple thermal vias for low thermal impedance.
Do not leave the MODE pin floating on TPSM33615FRDNR - per TI E2E forum discussions, an undefined MODE state can cause instability or unintended FPWM/PFM transitions. Tie MODE high for FPWM (low noise) or low for PFM (high efficiency). The RT pin must be connected to a valid programming resistor or GND; a noisy RT pin can cause switching-frequency jitter and increased VIN ripple (per TI engineer feedback). Do not exceed 36 V on VIN, and verify the upstream input protection handles load-dump transients up to 40 V if used in automotive 12-V environments.
The HotRod QFN-FCMOD package significantly reduces radiated EMI versus standard QFN, but additional filtering may be required for CISPR 25 / CISPR 32 Class B compliance in sensitive applications. According to TI's TPSM33615 datasheet, a small input pi-filter (ferrite bead plus 1-uF ceramic) typically achieves compliance with margin. Use FPWM mode when low EMI is the priority, since PFM produces variable-frequency harmonics that can fall into sensitive bands.
合规信息
RoHS compliant per JLCPCB parametric listing. Not AEC-Q100 qualified - for AEC-Q100 automotive applications, contact TI for the automotive-grade TPSM336x5-Q1 family. Halogen-free status not explicitly stated in verified data.
