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TPS54538

AKTIV

Synchroner Abwärtswandler, 3,8 bis 28 V, 5 A, 200 kHz bis 2,2 MHz

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Datenblatt

TPS54538

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 28 Vin (min) (V) 3.8 Vout (max) (V) 22 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 Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000028 Duty cycle (max) (%) 98 Sector Robotics, Test & measurement
Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 28 Vin (min) (V) 3.8 Vout (max) (V) 22 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 Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000028 Duty cycle (max) (%) 98 Sector Robotics, Test & measurement
VQFN-HR (RQF) 9 3 mm² 2 x 1.5
  • Configured for a wide range of applications
    • 3.8V to 28V input voltage range
    • 0.6V to 22V output voltage range
    • Up to 5A (TPS54538), 4A (TPS54438), 3A (TPS54338) continuous output current
    • 0.6V ±1% reference voltage (–40°C to 150°C)
    • 70ns and 114ns minimum switching on and off-time
    • 8us maximum switching on-time
    • 98% maximum duty cycle
  • High efficiency
    • Integrated 47mΩ and 21mΩ MOSFETs
    • Low quiescent current of 28uA (typical)
  • 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 electromagnetic interference (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 to support single-layer PCB layout
    • –40°C to 150°C operating junction temperature
    • 1.5mm × 2.0mm QFN package
  • Create a custom design with the TPS54x38 using the WEBENCH Power Designer
  • Configured for a wide range of applications
    • 3.8V to 28V input voltage range
    • 0.6V to 22V output voltage range
    • Up to 5A (TPS54538), 4A (TPS54438), 3A (TPS54338) continuous output current
    • 0.6V ±1% reference voltage (–40°C to 150°C)
    • 70ns and 114ns minimum switching on and off-time
    • 8us maximum switching on-time
    • 98% maximum duty cycle
  • High efficiency
    • Integrated 47mΩ and 21mΩ MOSFETs
    • Low quiescent current of 28uA (typical)
  • 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 electromagnetic interference (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 to support single-layer PCB layout
    • –40°C to 150°C operating junction temperature
    • 1.5mm × 2.0mm QFN package
  • Create a custom design with the TPS54x38 using the WEBENCH Power Designer

The TPS54x38 is a high-efficiency, high-voltage input, and easy-to-use synchronous buck converter with high design flexibility. With the wide operating input voltage range of 3.8V to 28V, the TPS54x38 is designed for systems powered from 5V, 12V, 19V, 24V power-bus rails. The device supports up to 5A, 4A, 3A continuous output current and 98% maximum duty cycle.

TPS54x38 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. Integrated bootstrap capacitor helps achieve single layer PCB and reduce external component count.

TPS54x38 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.

TPS54x38 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPS54x38 is available in 9-pin 1.5mm × 2.0mm 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 TPS54x38 is a high-efficiency, high-voltage input, and easy-to-use synchronous buck converter with high design flexibility. With the wide operating input voltage range of 3.8V to 28V, the TPS54x38 is designed for systems powered from 5V, 12V, 19V, 24V power-bus rails. The device supports up to 5A, 4A, 3A continuous output current and 98% maximum duty cycle.

TPS54x38 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. Integrated bootstrap capacitor helps achieve single layer PCB and reduce external component count.

TPS54x38 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.

TPS54x38 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPS54x38 is available in 9-pin 1.5mm × 2.0mm 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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TPSM84538 AKTIV Synchroner Abwärtswandler, 3,8 V bis 28 V Eingangsspannung, 5 A, 200 kHz bis 2,2 MHz Module version featuring TPS54538 with inductor integrated.

Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet TPS54x38 3.8V to 28V, 5A, 4A, 3A, Synchronous Buck Converter With User Selectable Mode datasheet (Rev. B) PDF | HTML 13 Mär 2025
Certificate TPS54538EVM EU Declaration of Conformity (DoC) 15 Nov 2024
Application note Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part II: Hybrid Sense Network PDF | HTML 27 Feb 2024

Design und Entwicklung

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Evaluierungsplatine

TPS54538EVM — TPS54538 – Evaluierungsmodul

Das TPS54538EVM ist eine vollständig montierte und getestete Schaltung zur Evaluierung des Wandlers TPS54538. Das Evaluierungsmodul ist für den Betrieb im Eingangsspannungsbereich von 3,8 V bis 28 V konfiguriert und erzeugt einen geregelten 5 V-Ausgang mit bis zu 5 A Laststrom. Die meisten (...)
Benutzerhandbuch: PDF | HTML
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Simulationsmodell

TPS54538 PSpice Transient Model

SLUM922.ZIP (269 KB) - PSpice Model
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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VQFN-HR (RQF) 9 Ultra Librarian
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