4.5V to 18V Input, 3A Synchronous Step-Down SWIFT™ Converter - TPS54325

TPS54325 (ACTIVE)

4.5V to 18V Input, 3A Synchronous Step-Down SWIFT™ Converter

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Description

The TPS54325 device is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54325 device enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution.

The main control loop for the TPS54325 uses the D-CAP2™ mode control which provides a very fast transient response with no external components. The TPS54325 also has a proprietary circuit that enables the device to adapt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VCC input , and from 2.0-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54325 is available in the 14 pin HTSSOP package, and designed to operate from –40°C to 85°C.

Features

  • D-CAP2™ Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VCC Input Voltage Range: 4.5 V to 18 V
  • Wide VIN Input Voltage Range: 2.0 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FET’s Optimized for
    Lower Duty Cycle Applications – 120 mΩ (High Side)
    and 70 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Power Good Output

View more

Parametrics Compare all products in Step-Down (Buck) Converter

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Topology
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Compensation
Special Features
Brand
Control Mode
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS54325 TPS54425 TPS54525 TPS54625 TPS54626 TPS53318 TPS54339 TPS54329E TPS54329 TPS54339E TPS53319 TPS54325-Q1 TPS56528
1     1     1     1     1     1     1     1     1     1     1     1     1    
4.5     4.5     4.5     4.5     4.5     1.5     4.5     4.5     4.5     4.5     1.5     4.5     4.5    
18     18     18     18     18     22     23     18     18     23     22     18     18    
0.76     0.76     0.76     0.76     0.76     0.6     0.76     0.76     0.76     0.76     0.6     0.76     0.76    
5.5     5.5     5.5     5.5     5.5     5.5     7     7     7     7     5.5     5.5     5.5    
3     4     5.5     6.5     6.5     8     3     3     3     3     14     3     5    
Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck    
700     700     650     650     650     1000     600     650     650     600     1000     700     650    
4.1     5.4     6.9     8.2     8.2     8     4.1     4.2     4.2     4.1     22     3.5     6.4    
0.85     0.85     0.9     0.95     0.95     0.32     0.85     0.8     0.8     0.6     0.32     0.85     0.25    
90     90     95     95     95     90     90     85     85     90     90     90     85    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Fixed     Adjustable     Fixed    
Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed    
Enable
Power Good
Synchronous Rectification    
Enable
Power Good
Synchronous Rectification    
Enable
Power Good
Synchronous Rectification    
Enable
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Enable
Synchronous Rectification    
Enable
Light Load Efficiency
Synchronous Rectification    
Enable
Synchronous Rectification    
Enable
Light Load Efficiency
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Enable
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Synchronous Rectification    
SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT             SWIFT        
D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP       D-CAP2    
1     1     1     1       1     2     2     2     2     1     1.5     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Automotive     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 105     -40 to 125    
14HTSSOP     14HTSSOP     14HTSSOP     14HTSSOP     14HTSSOP     22LSON-CLIP     8SO PowerPAD     8SO PowerPAD     8SO PowerPAD     8SO PowerPAD     22LSON-CLIP     14HTSSOP     8SO PowerPAD    
0.85 | 1ku     1.02 | 1ku     1.20 | 1ku     1.70 | 1ku     1.75 | 1ku     3.05 | 1ku     0.85 | 1ku     0.75 | 1ku     0.73 | 1ku     0.87 | 1ku     3.35 | 1ku     1.70 | 1ku     1.30 | 1ku    

Other qualified versions of TPS54325

Version Part Number Definition
Automotive TPS54325-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
WEBENCH® TPS54325
    Min   Max   Range  
  Vin V 4.5 to 18.0V  
  Vout V 0.77 to 5.5V  
  Iout A ≤ 3A  
  Ambient Temp °C -40 to 125°C  
Footprint BOM Cost Efficiency
 
   
 
 
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