Startseite Energiemanagement AC/DC- und DC/DC-Wandler (integrierter FET)
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AC/DC- und DC/DC-Wandler (integrierter FET)
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TPS543521

AKTIV

Synchroner Abwärtswandler, 3,8 V bis 18 V Eingang, 5 A, 200 kHz bis 2,2 MHz

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Datenblatt

TPS543521

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 18 Vin (min) (V) 3.8 Vout (max) (V) 17.64 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 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 28 Duty cycle (max) (%) 98 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 18 Vin (min) (V) 3.8 Vout (max) (V) 17.64 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 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 28 Duty cycle (max) (%) 98 Type Converter
VQFN-HR (RQF) 9 3 mm² 2 x 1.5
  • Configured for a wide range of applications
    • 3.8V to 18V input voltage range
    • Up to 5A (TPS543521), 4A (TPS543421), 3A (TPS543321) 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 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 over temperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), undervoltage protection (UVP), and undervoltage lockout (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 TPS543x21 using the WEBENCH Power Designer
  • Configured for a wide range of applications
    • 3.8V to 18V input voltage range
    • Up to 5A (TPS543521), 4A (TPS543421), 3A (TPS543321) 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 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 over temperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), undervoltage protection (UVP), and undervoltage lockout (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 TPS543x21 using the WEBENCH Power Designer

The TPS543x21 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 18V, the TPS543x21 is designed for systems powered from 5V, 12V power-bus rails. The device supports up to 5A, 4A, 3A continuous output current and 98% maximum duty cycle.

TPS543x21 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.

TPS543x21 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.

TPS543x21 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPS543x21 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 TPS543x21 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 18V, the TPS543x21 is designed for systems powered from 5V, 12V power-bus rails. The device supports up to 5A, 4A, 3A continuous output current and 98% maximum duty cycle.

TPS543x21 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.

TPS543x21 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.

TPS543x21 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPS543x21 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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Technische Dokumentation

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Typ Titel Datum
* Data sheet TPS543x21 3.8V to 18V, 5A, 4A, 3A, Synchronous Buck Converters With User Selectable Mode datasheet PDF | HTML 18 Mär 2025
Certificate TPS543521EVM EU Declaration of Conformity (DoC) 24 Feb 2025

Design und Entwicklung

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Evaluierungsplatine

TPS543521EVM — TPS543521 – Evaluierungsmodul

Das TPS543521EVM ist eine vollständig montierte und getestete Schaltung zur Evaluierung des Wandlers TPS543521. Das Evaluierungsmodul ist für den Betrieb im Eingangsspannungsbereich von 3,8 V bis 18 V konfiguriert und erzeugt einen geregelten 5,0 V-Ausgang mit bis zu 5 A Laststrom. Die meisten (...)
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VQFN-HR (RQF) 9 Ultra Librarian
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