4.5V to 14V Input, 15A Synchronous Step-Down SWIFT™ Converter - TPS56121

TPS56121 (ACTIVE)

4.5V to 14V Input, 15A Synchronous Step-Down SWIFT™ Converter

Description

TPS56121 is a high-efficiency and high-current synchronous buck converter designed to operate from a supply between 4.5 V and 14 V. The device is capable of producing an output voltage as low as 0.6 V at loads up to 25 A. Integrated NexFET™ Power MOSFETs provide a small footprint and ease of use.

The device implements a voltage-mode control with voltage feed-forward compensation that responds instantly to input voltage change.

TPS56121 is available in a thermally enhanced 22-pin PQFN (DQP) PowerPAD™ package.

The device offers design flexibility with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation. OCP levels are programmed by a single external resistor connected from the ILIM pin to the circuit ground. During the initial power-on sequence, the device enters a calibration cycle, measures the voltage at the ILIM pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. It then enters a shutdown/restart cycle until the fault is removed.

Features

  • 4.5-V to 14-V Input Voltage Range
  • Incorporates Power Block Technology
  • Up to 25-A Output Current
  • Fixed Frequency Options of 300 kHz, 500 kHz and 1 MHz
  • High-Side and Low-Side MOSFET RDS(on) Sensing
  • Programmable Soft-Start
  • 600-mV Reference Voltage with 1% Accuracy
  • Voltage Mode Control with Feed-Forward
  • Supports Pre-Biased Output
  • Thermal Shutdown
  • 22-Pin 5 mm x 6 mm PQFN PowerPAD Package
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    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$)
    TPS56121 TPS56221 TPS53353 TPS53355 TPS54821 TPS54622 TPS53319 TPS53318 TPS544B20 TPS544C20 TPS54620 TPS54340 TPS54020
    1     1     1     1     1     1     1     1     1     1     1     1     1    
    4.5     4.5     1.5     1.5     4.5     4.5     1.5     1.5     4.5     4.5     4.5     4.5     4.5    
    14     14     15     15     17     17     22     22     18     18     17     42     17    
    0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.8     0.8     0.6    
    12     12     5.5     5.5     15     15     5.5     5.5     5.5     5.5     15     41     5    
    15     25     20     30     8     6     14     8     20     30     6     3.5     10    
    Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck
    Inverting Buck-Boost    
    Buck    
    1000     1000     1000     1000     1600     1600     1000     1000     1000     1000     1600     2500     1200    
    21     35     28     40     11.5     8     22     8         8     5.5     15    
    2.5     2.5     0.32     0.32     0.6     0.002     0.32     0.32     8     8     0.6     0.146     0.6    
    93     93     90     90     100     98     90     90         98     98     98    
    Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Fixed     Adjustable     Adjustable     Adjustable     Adjustable     Fixed     Adjustable    
    External     External     Not Needed     Not Needed     External     External     Not Needed     Not Needed     Not Needed     Not Needed     External     External     External    
    Enable
    Power Good
    Adjustable Current Limit
    Synchronous Rectification    
    Enable
    Light Load Efficiency
    Synchronous Rectification    
    Adjustable Current Limit
    Enable
    Light Load Efficiency
    Power Good
    Synchronous Rectification    
    Adjustable Current Limit
    Enable
    Light Load Efficiency
    Power Good
    Synchronous Rectification    
    Enable
    Frequency Synchronization
    Power Good
    Synchronous Rectification
    Tracking    
    Enable
    Frequency Synchronization
    Power Good
    Tracking
    Synchronous Rectification    
    Adjustable Current Limit
    Enable
    Light Load Efficiency
    Power Good
    Synchronous Rectification    
    Adjustable Current Limit
    Enable
    Light Load Efficiency
    Power Good
    Synchronous Rectification    
    Adjustable Current Limit
    Adjustable UVLO
    Dynamic Voltage Scaling
    Enable
    PMBus
    Power Good
    Pre-Bias Start-Up
    Remote Sense
    Synchronous Rectification
    Telemetry
    Voltage Margining    
    Adjustable Current Limit
    Adjustable UVLO
    Dynamic Voltage Scaling
    Enable
    PMBus
    Power Good
    Pre-Bias Start-Up
    Remote Sense
    Synchronous Rectification
    Telemetry
    Voltage Margining    
    Enable
    Frequency Synchronization
    Power Good
    Tracking
    Synchronous Rectification    
    Enable
    Frequency Synchronization
    Light Load Efficiency
    Adjustable UVLO    
    Enable
    Frequency Synchronization
    Power Good
    Tracking
    Adjustable Current Limit
    Phase Interleaving
    Light Load Efficiency
    Synchronous Rectification    
    SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT       SWIFT    
    Voltage Mode     Voltage Mode     D-CAP     D-CAP     Current Mode     Current Mode     D-CAP     D-CAP     D-CAP
    D-CAP2    
    D-CAP
    D-CAP2    
    Current Mode     Current Mode     Current Mode    
    1     1     1     1     1     1     1     1     0.5     0.5     1     1     1    
    Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
    -40 to 125     -40 to 125     -40 to 85     -40 to 85     -40 to 125     -40 to 150     -40 to 85     -40 to 85         -40 to 150     -40 to 125     -40 to 150    
    22LSON-CLIP     22LSON-CLIP     22LSON-CLIP     22LSON-CLIP     14VQFN     14VQFN     22LSON-CLIP     22LSON-CLIP     40LQFN-CLIP     40LQFN-CLIP     14VQFN     8SO PowerPAD     15VQFN    
    3.50 | 1ku     3.75 | 1ku     3.50 | 1ku     3.75 | 1ku     1.90 | 1ku     2.50 | 1ku     3.35 | 1ku     3.05 | 1ku     3.70 | 1ku     3.90 | 1ku     2.50 | 1ku     1.68 | 1ku     3.10 | 1ku    
    WEBENCH® TPS56121
        Min   Max   Range  
      Vin V 4.5 to 14.0V  
      Vout V 0.6 to 12.0V  
      Iout A ≤ 15A  
      Ambient Temp °C -40 to 125°C  
    Footprint BOM Cost Efficiency
     
       
     
     
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