TPS54540B-Q1 Automotive 42V, 5A, Step-Down Regulator With Integrated High Side MOSFET | TI.com

TPS54540B-Q1 (ACTIVE)

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

Automotive 42V, 5A, Step-Down Regulator With Integrated High Side MOSFET - TPS54540B-Q1
 

Description

The TPS54540B-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 TPS54540B-Q1 is available in an 8-pin thermally-enhanced HSOP PowerPAD package.

Features

  • 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

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS54540B-Q1 TPS54340B-Q1 TPS54360B-Q1 TPS54560B-Q1
4.5     4.5     4.5     4.5    
42     42     60     60    
0.8     0.8     0.8     0.8    
41.1     41     58.8     58.8    
5     3.5     3.5     5    
1     1     1     1    
100     100     100     100    
2500     2500     2500     2500    
0.146     0.146     0.146     0.146    
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable    
Current Mode     Current Mode     Current Mode     Current Mode    
98     98     98     98    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
Automotive     Automotive     Automotive     Automotive    
SO PowerPAD     SO PowerPAD     SO PowerPAD     SO PowerPAD    
Coming Soon!
WEBENCH® Power Designer is now even easier to use. Learn more.

WEBENCH® Designer TPS54540B-Q1

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 0.8 to 41V
Iout  A ≤ 5A
Ambient Temp  °C -40 to 125°C


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