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TPSM84538

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TPSM84538

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Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 28 Vin (min) (V) 3.8 Vout (max) (V) 3.3 Vout (min) (V) 0.6 Features Adjustable soft start, Adjustable switching frequency, Enable, External Sync, Light-load efficiency, Low Quiescent Current, Phase Interleaving, UVLO adjustable EMI & noise features Fixed-frequency control, Low parasitic packaging, Mitigated interference & noise technology – architecture 1 (MINT 1), Pinout optimization, Spread Spectrum Operating temperature range (°C) -40 to 125 Type Module Duty cycle (max) (%) 98 Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200
Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 28 Vin (min) (V) 3.8 Vout (max) (V) 3.3 Vout (min) (V) 0.6 Features Adjustable soft start, Adjustable switching frequency, Enable, External Sync, Light-load efficiency, Low Quiescent Current, Phase Interleaving, UVLO adjustable EMI & noise features Fixed-frequency control, Low parasitic packaging, Mitigated interference & noise technology – architecture 1 (MINT 1), Pinout optimization, Spread Spectrum Operating temperature range (°C) -40 to 125 Type Module Duty cycle (max) (%) 98 Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200
QFN-FCMOD (RCJ) 9 14.85 mm² (3.3 mm × 4.5 mm)
  • Configured for a wide range of applications
    • 3.8V to 28V input voltage range
    • 0.6V to 5V output voltage range
    • Up to 5A continuous output current
    • 0.6V ±1% reference voltage (–40°C to 125°C)
    • Low quiescent current of 28uA (typical)
    • 70ns, 114ns minimum switching on, off-time
    • 8us maximum switching on-time
    • 98% maximum duty cycle
  • Ease of use and small design size
    • Peak current control mode with internal compensation
    • 200kHz to 2.2MHz selectable frequency
    • Synchronizable to an external clock (support phase shift): 200kHz to 2.2MHz
    • Selectable PFM / FCCM at light load condition
    • Selectable adjustable soft-start time, power-good indicator function
    • Good EMI performance with frequency spread spectrum and optimized pinout
    • Hiccup overcurrent (OC) limit for both high-side and low-side MOSFETs
    • Non-latched protections for overtemperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), undervoltage protection (UVP), and undervoltage lockout (UVLO)
    • Integrated bootstrap capacitor and inductor to support easy PCB layout
    • Operating junction temperature of –40°C to 125°C
    • 3.3mm × 4.5mm × 2mm QFN package
  • Create a custom design with the TPSM84538 using the WEBENCH Power Designer
  • Configured for a wide range of applications
    • 3.8V to 28V input voltage range
    • 0.6V to 5V output voltage range
    • Up to 5A continuous output current
    • 0.6V ±1% reference voltage (–40°C to 125°C)
    • Low quiescent current of 28uA (typical)
    • 70ns, 114ns minimum switching on, off-time
    • 8us maximum switching on-time
    • 98% maximum duty cycle
  • Ease of use and small design size
    • Peak current control mode with internal compensation
    • 200kHz to 2.2MHz selectable frequency
    • Synchronizable to an external clock (support phase shift): 200kHz to 2.2MHz
    • Selectable PFM / FCCM at light load condition
    • Selectable adjustable soft-start time, power-good indicator function
    • Good EMI performance with frequency spread spectrum and optimized pinout
    • Hiccup overcurrent (OC) limit for both high-side and low-side MOSFETs
    • Non-latched protections for overtemperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), undervoltage protection (UVP), and undervoltage lockout (UVLO)
    • Integrated bootstrap capacitor and inductor to support easy PCB layout
    • Operating junction temperature of –40°C to 125°C
    • 3.3mm × 4.5mm × 2mm QFN package
  • Create a custom design with the TPSM84538 using the WEBENCH Power Designer

The TPSM84538 is a high-efficiency, high-power density, and easy-to-use, synchronous buck power module with high design flexibility. With operating input voltage ranging from 3.8V to 28V, the TPSM84538 is designed for systems powered from 5V, 12V, 24V power-bus rails. The device supports up to 5A continuous output current and 98% maximum duty cycle.

TPSM84538 uses fixed frequency peak current control with internal compensation for fast transient response and good line and load regulation. With the optimized internal loop compensation, the device eliminates the need for external compensation over a wide output voltage range and switching frequency.

TPSM84538 allows high design flexibility with wide supported switching frequency of 200kHz – 2.2MHz set by the RT/SYNC pin. The device has the option for pulse frequency modulation (PFM), forced continuous conduction modulation (FCCM) at light load condition, and adjustable soft-start (SS) time / power-good (PG) indicator with different configuration of the MODE pin.

TPSM84538 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPSM84538 is available in a 9-pin, 3.3mm × 4.5mm, QFN package, and the pinout is available for single-layer PCB layout. The junction temperature is specified from –40°C to 125°C.

The TPSM84538 is a high-efficiency, high-power density, and easy-to-use, synchronous buck power module with high design flexibility. With operating input voltage ranging from 3.8V to 28V, the TPSM84538 is designed for systems powered from 5V, 12V, 24V power-bus rails. The device supports up to 5A continuous output current and 98% maximum duty cycle.

TPSM84538 uses fixed frequency peak current control with internal compensation for fast transient response and good line and load regulation. With the optimized internal loop compensation, the device eliminates the need for external compensation over a wide output voltage range and switching frequency.

TPSM84538 allows high design flexibility with wide supported switching frequency of 200kHz – 2.2MHz set by the RT/SYNC pin. The device has the option for pulse frequency modulation (PFM), forced continuous conduction modulation (FCCM) at light load condition, and adjustable soft-start (SS) time / power-good (PG) indicator with different configuration of the MODE pin.

TPSM84538 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPSM84538 is available in a 9-pin, 3.3mm × 4.5mm, QFN package, and the pinout is available for single-layer PCB layout. The junction temperature is specified from –40°C to 125°C.
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* 数据表 TPSM84538 3.8V to 28V, 5A, Synchronous Buck Power Module With User Selectable Mode 数据表 (Rev. A) PDF | HTML 2026-10-13

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TPSM84338EVM — TPSM84338 评估模块

TPSM84338EVM 是一个经全面组装和测试的电路，用于评估 TPSM84338 模块。该评估模块经配置，可在 3.8V 至 28V 的输入电压范围内运行，并提供 5V 稳压输出，负载电流高达 3A。该器件的大多数设置可通过电阻器和跳线轻松调整或设置，例如：工作模式、软启动时间和开关频率。
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仿真模型

TPSM84338 Pspice Transient model

SLUM921.ZIP (239 KB) - PSpice 模型
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封装 引脚 CAD 符号、封装和 3D 模型
QFN-FCMOD (RCJ) 9 Ultra Librarian
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