TPS54340B-Q1 Automotive, 4.5V to 42V Input, 3.5A Step-Down Converter With Eco-Mode™ | TI.com

TPS54340B-Q1 (ACTIVE) Automotive, 4.5V to 42V Input, 3.5A Step-Down Converter With Eco-Mode™

 

Description

The TPS54340B-Q1 device 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 µ 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 for optimization of either efficiency or external component size. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54340B-Q1 device 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 With PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Supported by WEBENCH® Software Tool

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WEBENCH® Designer TPS54340B-Q1

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 0.8 to 41V
Iout  A ≤ 3.5A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order 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 Type Package size: mm2:W x L (PKG)
TPS54340B-Q1 Order now 4.5     42     0.8     41     3.5     1     100     2500     0.146     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
UVLO Adjustable    
Current Mode     98     -40 to 125     Automotive     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LM53635-Q1 Order now 3.5     42     3.2     10     3.5     1     1850     2350     0.018     Enable
Fixed Output
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     Automotive     VQFN-HR | 22     Converter     22VQFN-HR: 20 mm2: 4 x 5 (VQFN-HR | 22)    
TPS54360B-Q1 Order now 4.5     60     0.8     58.8     3.5     1     100     2500     0.146     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
UVLO Adjustable    
Current Mode     98     -40 to 125     Automotive     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
TPS54560B-Q1 Order now 4.5     60     0.8     58.8     5     1     100     2500     0.146     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
UVLO Adjustable    
Current Mode     98     -40 to 125     Automotive     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)