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

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
  • For SWIFT Power Products Documentation,
    see http://www.ti.com/swift

View more

Parametrics Compare all products in Buck converters (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)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Type
TPS56121 TPS53353 TPS53355 TPS548B22 TPS548D22 TPS549B22 TPS549D22 TPS56221
4.5     1.5     1.5     1.5     1.5     1.5     1.5     4.5    
14     15     15     18     16     18     16     14    
0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6    
12     5.5     5.5     5.5     5.5     5.5     5.5     12    
15     20     30     25     40     25     40     25    
1     1     1     1     1     1     1     1    
300     250     250     425     425     315     315     300    
1000     1000     1000     1050     1050     1125     1125     1000    
2.5     0.32     0.32     2     2     2     2     2.5    
Adjustable Current Limit
Enable
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Output Discharge
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Light Load Efficiency
Output Discharge
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Over Current Protection
PMBus
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable
Voltage Margining    
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
PMBus
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
Tracking
UVLO Adjustable
Voltage Margining    
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification    
Voltage Mode     D-CAP     D-CAP     D-CAP3     D-CAP3     D-CAP3     D-CAP3     Voltage Mode    
93     90     90     80     80     80     80     93    
-40 to 125     -40 to 85     -40 to 85     -40 to 125     -40 to 125     -40 to 125     -40 to 85     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
LSON-CLIP | 22     LSON-CLIP | 22     LSON-CLIP | 22     LQFN-CLIP | 40     LQFN-CLIP | 40     LQFN-CLIP | 40     LQFN-CLIP | 40     LSON-CLIP | 22    
Converter     Converter     Converter     Converter