TPS54340 42 V Input, 3.5 A, Step-Down DC/DC Converter with Eco-mode™ | TI.com

TPS54340 (ACTIVE)

42 V Input, 3.5 A, Step-Down DC/DC Converter with Eco-mode™

42 V Input, 3.5 A, Step-Down DC/DC Converter with Eco-mode™ - TPS54340
 

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Description

The TPS54340 is a 42 V, 3.5 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 45 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 1 µA when the enable pin is pulled low.

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

A wide switching frequency range allows either efficiency or external component size to be optimized. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54340 is available in an 8-terminal thermally enhanced HSOP PowerPAD™ package.

Features

  • 4.5 V to 42 V (45 V Abs Max) Input Range
  • 3.5 A Continuous Current, 4.5 A Minimum Peak Inductor Current Limit
  • Current Mode Control DC-DC Converter
  • 92-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with Pulse Skipping Eco-mode™
  • Low Dropout at Light Loads with Integrated BOOT Recharge FET
  • 146 µA Operating Quiescent Current
  • 1 µA Shutdown Current
  • 100 kHz to 2.5 MHz Fixed Switching Frequency
  • Synchronizes to External Clock
  • Adjustable UVLO Voltage and Hysteresis
  • Internal Soft-Start
  • Accurate Cycle-by-Cycle Current Limit
  • Thermal, Overvoltage, and Frequency Foldback Protection
  • 0.8 V 1% Internal Voltage Reference
  • 8-Terminal HSOP with PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Create a Custom Design Using the TPS54340 with the WEBENCH Power Designer

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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
TPS54340 LM43603 LMR14030 LMR23630 TPS54040A TPS54140A TPS54240 TPS5430 TPS54341 TPS54540 TPS54541
4.5     3.5     4     4.5     3.5     3.5     3.5     5.5     4.5     4.5     4.5    
42     36     40     36     42     42     42     36     42     42     42    
0.8     1     1     1     0.8     0.8     0.8     1.23     0.8     0.8     0.8    
41     28     36     30     39     39     39     31     41     41.1     41    
3.5     3     3.5     3     0.5     1.5     2.5     3     3.5     5     5    
1     1     1     1     1     1     1     1     1     1     1    
100     200     200     200     100     100     100     500     100     100     100    
2500     2200     2500     2200     2500     2500     2500     500     2500     2500     2500    
0.146     0.027     0.04     0.075     0.116     0.116     0.138     3     0.152     0.146     0.152    
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Enable     Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Voltage Mode     Current Mode     Current Mode     Current Mode    
98     99     98     97     98     98     98     87     98     98     98    
-40 to 125     -40 to 125     -40 to 125