TPS54550 4.5V to 20V Input, 6A Synchronous Step-Down Converter with Low-Side Gate Driver | TI.com

TPS54550
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4.5V to 20V Input, 6A Synchronous Step-Down Converter with Low-Side Gate Driver

 

Recommended alternative parts

  • TPS54620  -  4.5 to 17V, 6A converter in 3.5x3.5 QFN integrates synchronous rectifier

Description

The TPS54550 is a medium output current synchronous buck PWM converter with an integrated high side MOSFET and a gate driver for an low side external MOSFET. Features include a high performance voltage error amplifier that enables maximum performance under transient conditions and flexibility in choosing the output filter inductors and capacitors. The TPS54550 has an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4.5 V; a slow-start circuit to limit in-rush currents; and a power good output to indicate valid output conditions. The synchronization feature is configurable as either an input or an output for easy 180° out of phase synchronization.

The TPS54550 device is available in a thermally enhanced 16-pin TSSOP (PWP) PowerPAD™ package. TI provides evaluation modules and the SWIFT™ Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

Features

  • 40 m MOSFET Switch for High Efficiency at 6-A (7.5 Peak) Output Current
  • Uses External Lowside MOSFET
  • Output Voltage Adjustable Down to 0.891 V With 1% Accuracy
  • Synchronizes to External Clock
  • 180° Out of Phase Synchronization
  • Wide PWM Frequency— Fixed 250 kHz, 500 kHz or Adjustable 250 kHz to 700 kHz
  • Adjustable Slow Start
  • Adjustable Undervoltage Lockout
  • Load Protected by Peak Current Limit and Thermal Shutdown
  • 16-Pin TSSOP PowerPAD™ Package
  • SWIFT Documentation Application Notes, and Design Software: www.ti.com/swift
  • APPLICATIONS
    • Industrial and Commercial Low Power Systems
    • LCD Monitors and TVs
    • Computer Peripherals
    • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors

SWIFT, PowerPAD are trademarks of Texas Instruments.

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)
TPS54550 Order now 4.5     20     0.9     12     6     1     250     700     9     Enable
Frequency Synchronization
Phase Interleaving
Power Good
Synchronous Rectification    
Voltage Mode     80     -40 to 150     Catalog     HTSSOP | 16     Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)    
TPS54350 Order now 4.5     20     0.9     12     3     1     250     700     5     Enable
Frequency Synchronization
Phase Interleaving
Power Good
Synchronous Rectification    
Voltage Mode     80     -40 to 150     Catalog     HTSSOP | 16     Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)