TPS54424 4.5V to 17V Input, Current Mode, 4A Synchronous SWIFT™ Step-Down Converter | TI.com

TPS54424 (ACTIVE)

4.5V to 17V Input, Current Mode, 4A Synchronous SWIFT™ Step-Down Converter

4.5V to 17V Input, Current Mode, 4A Synchronous SWIFT™ Step-Down Converter - TPS54424
 

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Description

The TPS54424 is a full-featured 17-V (19-V maximum), 4-A synchronous step-down DC/DC converter in a 3.5 mm × 3.5 mm HotRod™ QFN package.

The device is optimized for small solution size through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through peak current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor footprint.

The peak current mode control simplifies the loop compensation and provides fast transient response. Cycle-by-cycle peak current limiting on the high-side and low-side sourcing current limit protects the device in overload situations. Hiccup limits MOSFET power dissipation if a short circuit or over loading fault persists.

A power good supervisor circuit monitors the regulator output. The PGOOD pin is an open-drain output and goes high impedance when the output voltage is in regulation. An internal deglitch time prevents the PGOOD pin from pulling low unless a fault has occurred.

A dedicated EN pin can be used to control the regulator on/off and adjust the input undervoltage lockout. The output voltage start-up ramp is controlled by the SS/TRK pin, which allows operation as either a standalone power supply or in tracking situations.

Features

  • Small 3.5-mm × 3.5-mm HotRod™ QFN Package
  • Integrated 14.1-mΩ and 6.1-mΩ MOSFETs
  • Peak Current Mode Control With Fast Transient Response
  • 200-kHz to 1.6-MHz Fixed Switching Frequency
  • Synchronizes to External Clock
  • 0.6-V Voltage Reference ±0.85% Over Temperature
  • 0.6-V to 12-V Output Voltage Range
  • Hiccup Current Limit
  • Safe Start-Up into Pre-Biased Output Voltage
  • Adjustable Soft Start and Power Sequencing
  • Adjustable Input Undervoltage Lockout
  • 3-µA Shutdown Current
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Output Overvoltage Protection
  • Non-latch Thermal Shutdown Protection
  • –40°C to 150°C Operating Junction Temperature
  • Create a Custom Design Using the TPS54424 With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck converters (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
Type
TPS54424 TPS54824
4.5     4.5    
17     17    
0.6     0.6    
12     12    
4     8    
1     1    
200     200    
1600     1600    
0.58     0.58    
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Current Mode     Current Mode    
98     98    
-40 to 150     -40 to 150    
Catalog     Catalog    
VQFN-HR | 18     VQFN-HR | 18    
Converter     Converter    
New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS54424

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.6 to 12V
Iout  A ≤ 4A
Ambient Temp  °C -40 to 140°C


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