TPS54824 (ACTIVE)

4.5V to 17V Input, Current Mode, 8A Synchronous SWIFT™ Step-Down Converter

 

Description

The TPS54824 is a full featured 17-V, 8-A synchronous step-down converter in a 3.5 mm x 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 under voltage lockout. The output voltage startup 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 x 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 Startup into Pre-Biased Output Voltage
  • Adjustable Soft-start and Power Sequencing
  • Adjustable Input Under Voltage 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
  • Supported at the WEBENCH® Design Center

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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)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS54824 TPS54320 TPS54424 TPS54620 TPS54622
4.5    4.5    4.5    4.5    4.5   
17    17    17    17    17   
0.6    0.8    0.6    0.8    0.6   
12    15    12    15    15   
8    3    4    6    6   
1    1    1    1    1   
200    200    200    200    200   
1600    1200    1600    1600    1600   
0.58    0.6    0.58    0.6    0.6   
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking   
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking   
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking   
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    Current Mode    Current Mode    Current Mode   
98    98    98    98    98   
-40 to 150    -40 to 150    -40 to 125    -40 to 150    -40 to 150   
Catalog    Catalog    Catalog    Catalog    Catalog   
VQFN-HR    VQFN    VQFN-HR    VQFN    VQFN   
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WEBENCH® Designer TPS54824

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.6 to 12V
Iout  A ≤ 8A
Ambient Temp  °C -40 to 125°C


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