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TPSM84338

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3.8-V to 28-V Input, 3A, 200kHz-2.2MHz synchronous step-down power module

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Data sheet

TPSM84338

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Module Iout (max) (A) 3 Vin (min) (V) 3.8 Vin (max) (V) 28 Vout (min) (V) 0.6 Vout (max) (V) 17 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable switching frequency, Enable, External Sync, Light Load Efficiency, Low Quiescent Current, Phase Interleaving, Soft Start Adjustable, UVLO adjustable Control mode current mode Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Module Iout (max) (A) 3 Vin (min) (V) 3.8 Vin (max) (V) 28 Vout (min) (V) 0.6 Vout (max) (V) 17 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable switching frequency, Enable, External Sync, Light Load Efficiency, Low Quiescent Current, Phase Interleaving, Soft Start Adjustable, UVLO adjustable Control mode current mode Duty cycle (max) (%) 98
QFN-FCMOD (RCJ) 9 14.85 mm² 3.3 x 4.5
  • Configured for a wide range of applications
    • 3.8V to 28V input voltage range
    • 0.6V to 17V output voltage range
    • Up to 3A 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 OC limit for both high-side and low-side MOSFETs
    • Non-latched protections for OTP, OCP, OVP, UVP, and 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 TPSM84338 using the WEBENCH Power Designer
  • Configured for a wide range of applications
    • 3.8V to 28V input voltage range
    • 0.6V to 17V output voltage range
    • Up to 3A 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 OC limit for both high-side and low-side MOSFETs
    • Non-latched protections for OTP, OCP, OVP, UVP, and 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 TPSM84338 using the WEBENCH Power Designer

The TPSM84338 is a high efficiency, high voltage input, and easy-to-use synchronous buck power module with high design flexibility. With the wide operating input voltage range of 3.8V to 28V, the TPSM84338 is designed for systems powered from 5V, 12V, 19V, 24V power-bus rails. The device supports up to 3A continuous output current and 98% maximum duty cycle.

TPSM84338 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.

TPSM84338 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.

TPSM84338 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPSM84338 is available in 9-pin, 3.3mm × 4.5mm, QFN package, and the pinout is available for single-layer PCB layout and the junction temperature is specified from –40°C to 150°C.

The TPSM84338 is a high efficiency, high voltage input, and easy-to-use synchronous buck power module with high design flexibility. With the wide operating input voltage range of 3.8V to 28V, the TPSM84338 is designed for systems powered from 5V, 12V, 19V, 24V power-bus rails. The device supports up to 3A continuous output current and 98% maximum duty cycle.

TPSM84338 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.

TPSM84338 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.

TPSM84338 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPSM84338 is available in 9-pin, 3.3mm × 4.5mm, QFN package, and the pinout is available for single-layer PCB layout and the junction temperature is specified from –40°C to 150°C.
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* Data sheet TPSM84338 3.8V to 28V, 3A, Synchronous Buck Power Module With User Selectable Mode datasheet PDF | HTML 27 Nov 2024
EVM User's guide TPSM84338 Step-Down Converter Module Evaluation Module User's Guide PDF | HTML 04 Dec 2024
Certificate TPSM84338EVM EU Declaration of Conformity (DoC) 15 Nov 2024

Design & development

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Evaluation board

TPSM84338EVM — TPSM84338 evaluation module

The TPSM84338EVM is a fully assembled and tested circuit for evaluating the TPSM84338 module. The evaluation module is configured to operate from input voltage range of 3.8V to 28V and produce a regulated 5V output with up to 3A load current. Most settings of the device can be easily adjusted or (...)
User guide: PDF | HTML
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Simulation model

TPSM84338 Pspice Transient model

SLUM921.ZIP (239 KB) - PSpice Model
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Package Pins CAD symbols, footprints & 3D models
QFN-FCMOD (RCJ) 9 Ultra Librarian
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