4.5V to 17V Input, 3A Synchronous Step-Down SWIFT™ Converter - TPS54320

TPS54320 (ACTIVE)

4.5V to 17V Input, 3A Synchronous Step-Down SWIFT™ Converter

 

Recommended alternative parts

  • TPS82130  -  Looking for a power module? Try the TPS82130
  • LMZ31503  -  Looking for a power module? Try the LMZ31503

Description

The TPS54320 is a full featured 17-V, 3-A synchronous step-down converter which is optimized for small designs through high efficiency and integrated high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor's footprint.

The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.

Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature. The TPS54320 is available in a 14-pin, 3.5-mm × 3.5-mm VQFN, thermally-enhanced package.

Features

  • Integrated 57-mΩ / 50-mΩ MOSFETs
  • Split Power Rail: 1.6 to 17 V on PVIN
  • 200-kHz to 1.2-MHz Switching Frequency
  • Synchronizes to External Clock
  • 0.8-V Voltage Reference With ±1% Accuracy
  • Low 2-µA Shutdown Quiescent Current
  • Hiccup Overcurrent Protection
  • Monotonic Start-Up into Prebiased Outputs
  • –40°C to 150°C Operating Junction
    Temperature Range
  • Pin-to-Pin Compatible With the TPS54620
  • Adjustable Slow Start/Power Sequencing
  • Power Good Output for Undervoltage and
    Overvoltage Monitoring
  • Adjustable Input Undervoltage Lockout (UVLO)
  • Supported by SwitcherPro™ Software Tool
  • For SWIFT Documentation and SwitcherPro,
    Visit www.ti.com/swift
  • APPLICATIONS
    • Broadband, Networking, and Communication
      Infrastructure
    • Automated Test and Medical Equipment
    • DSP and FPGA Point-of-Load Applications
      from 12-V Bus

View more

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
TPS54320 TPS54620 TPS54622 TPS54623
4.5    4.5    4.5    4.5   
17    17    17    17   
0.8    0.8    0.6    0.6   
15    15    15    15   
3    6    6    6   
1    1    1    1   
200    200    200    200   
1200    1600    1600    1600   
0.6    0.6    0.6    0.25   
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
Pre-Bias Start-Up
Synchronous Rectification
Tracking   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking   
Current Mode    Current Mode    Current Mode    Current Mode   
98    98    98    98   
-40 to 150    -40 to 150    -40 to 150    -40 to 150   
Catalog    Catalog    Catalog    Catalog   
VQFN    VQFN    VQFN    VQFN   
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.

WEBENCH® Designer TPS54320

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.8 to 15V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 85°C


Footprint BOM Cost Efficiency


Preview design