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

The TPS56121 device is a high-efficiency and high-current synchronous buck converter designed to operate from a supply of 4.5 V to 14 V. The device can produce an output voltage as low as 0.6 V at loads up to 15 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.

The 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 and 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 15-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 Prebiased Output
  • Thermal Shutdown
  • 22-Pin 5-mm × 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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