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TPS54540-Q1

NOT RECOMMENDED FOR NEW DESIGNS

42V, 5A, Step-Down Regulator with Integrated High Side MOSFET

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Data sheet
TPS54540-Q1 is not recommended for new designs
This product continues to be available for existing customers. New designs should consider an alternate product.
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TPS54540B-Q1 ACTIVE 4.5-V to 42-V input, 5-A, step-down DC-DC converter with Eco-mode™ Pin-compatible with the TPS54540-Q1.

TPS54540-Q1

NOT RECOMMENDED FOR NEW DESIGNS
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 125 Type Converter Iout (max) (A) 5 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Soft Start Adjustable, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 41.1 Iq (typ) (µA) 146 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 125 Type Converter Iout (max) (A) 5 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Soft Start Adjustable, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 41.1 Iq (typ) (µA) 146 Duty cycle (max) (%) 98
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H1C
    • Device CDM ESD Classification Level C3B
  • High-Efficiency at Light Loads With Pulse-
    Skipping Eco-mode™
  • 92-mΩ High-Side MOSFET
  • 146-µA Operating Quiescent Current and 2-µA
    Shutdown Current
  • 100-kHz to 2.5-MHz Adjustable Switching
    Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads With Integrated
    BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V 1% Internal Voltage Reference
  • 8-Pin HSOP PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Supported by WEBENCH® Software Tool
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H1C
    • Device CDM ESD Classification Level C3B
  • High-Efficiency at Light Loads With Pulse-
    Skipping Eco-mode™
  • 92-mΩ High-Side MOSFET
  • 146-µA Operating Quiescent Current and 2-µA
    Shutdown Current
  • 100-kHz to 2.5-MHz Adjustable Switching
    Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads With Integrated
    BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V 1% Internal Voltage Reference
  • 8-Pin HSOP PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Supported by WEBENCH® Software Tool

The TPS54540-Q1 device is a 42-V, 5-A, step-down regulator with an integrated high-side MOSFET. The device survives load-dump pulses up to 65 V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no load supply current to 146 µA. Shutdown supply current is reduced to 2 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using an external resistor divider at the enable pin. The output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot.

A wide adjustable frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protect internal and external components during an overload condition.

The TPS54540-Q1 is available in an 8-pin thermally-enhanced HSOP PowerPAD package.

The TPS54540-Q1 device is a 42-V, 5-A, step-down regulator with an integrated high-side MOSFET. The device survives load-dump pulses up to 65 V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no load supply current to 146 µA. Shutdown supply current is reduced to 2 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using an external resistor divider at the enable pin. The output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot.

A wide adjustable frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protect internal and external components during an overload condition.

The TPS54540-Q1 is available in an 8-pin thermally-enhanced HSOP PowerPAD package.
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* Data sheet TPS54540-Q1 4.5-V to 42-V Input, 5-A, Step-Down DC-DC Converter With Eco-mode™ datasheet (Rev. B) PDF | HTML 25 Nov 2015

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