TPS54824 4.5V to 17V Input, Current Mode, 8A Synchronous SWIFT™ Step-Down Converter | TI.com

TPS54824
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4.5V to 17V Input, Current Mode, 8A Synchronous SWIFT™ Step-Down Converter

 

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Description

The TPS54824 is a full-featured 17-V (19-V maximum), 8-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

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  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.6 to 12V
Iout  A ≤ 8A
Ambient Temp  °C -40 to 140°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)
TPS54824 Order now 4.5     17     0.6     12     8     1     200     1600     0.58     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     VQFN-HR | 18     Converter     18VQFN-HR: 12 mm2: 3.5 x 3.5 (VQFN-HR | 18)    
TPS54020 Order now 4.5     17     0.6     5     10     1     200     1200     0.6     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     VQFN-HR | 15     Converter     15VQFN-HR: 12 mm2: 3.5 x 3.5 (VQFN-HR | 15)    
TPS54424 Order now 4.5     17     0.6     12     4     1     200     1600     0.58     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     VQFN-HR | 18     Converter     18VQFN-HR: 12 mm2: 3.5 x 3.5 (VQFN-HR | 18)    
TPS54620 Order now 4.5     17     0.8     15     6     1     200     1600     0.6     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     VQFN | 14     Converter     14VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 14)    
TPS54A24 Order now 4.5     17     0.6     12     10     1     200     1600     0.58     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Current Mode     98     -40 to 150     Catalog     WQFN | 24