Home Power management AC/DC & DC/DC converters (integrated FET)
Home
Power management
AC/DC & DC/DC converters (integrated FET)
NEW

TPS54538

ACTIVE

3.8-V to 28-V, 5-A, 200-kHz to 2.2-MHz, synchronous buck converter

Order now
Data sheet

TPS54538

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 3.8 Vin (max) (V) 28 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable soft start, Adjustable switching frequency, Enable, External Sync, Light Load Efficiency, Low Quiescent Current, Phase Interleaving, UVLO adjustable Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 22 Iq (typ) (µA) 28 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 3.8 Vin (max) (V) 28 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable soft start, Adjustable switching frequency, Enable, External Sync, Light Load Efficiency, Low Quiescent Current, Phase Interleaving, UVLO adjustable Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 22 Iq (typ) (µA) 28 Duty cycle (max) (%) 98
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 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 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 TPS54538 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 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 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 TPS54538 using the WEBENCH Power Designer

The TPS54538 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 TPS54538 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.

TPS54538 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.

TPS54538 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.

TPS54538 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPS54538 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 TPS54538 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 TPS54538 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.

TPS54538 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.

TPS54538 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.

TPS54538 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPS54538 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.
filter Find other AC/DC & DC/DC converters (integrated FET)
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet TPS54538 3.8V to 28V, 5A, Synchronous Buck Converter With User Selectable Mode datasheet PDF | HTML 15 Nov 2024
EVM User's guide TPS54538 Step-Down Converter Evaluation Module User's Guide PDF | HTML 04 Dec 2024
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 & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS54538EVM — TPS54538 evaluation module

The TPS54538EVM is a fully assembled and tested circuit for evaluating the TPS54538 converter. 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 5A load current. Most settings of the device can be easily adjusted or (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS54538 PSpice Transient Model

SLUM922.ZIP (269 KB) - PSpice Model
Download
Package Pins CAD symbols, footprints & 3D models
VQFN-HR (RQF) 9 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos