TPS56221 4.5V to 14V Input, 25A Synchronous Step-Down SWIFT™ Converter | TI.com

TPS56221
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4.5V to 14V Input, 25A Synchronous Step-Down SWIFT™ Converter

 

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Description

The TPS56221 device is a high-efficiency and high-current synchronous buck converter designed to operate from a supply from 4.5 V to 14 V. The device can produce 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.

The TPS56221 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 Prebiased Output
  • Thermal Shutdown
  • 22-Pin 5-mm × 6-mm PQFN PowerPAD™ Package
  • For SWIFT Power Products Documentation,
    see http://www.ti.com/swift

New!
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WEBENCH® Designer TPS56221

  Min   Max Range
Vin  V 4.5 to 14.0V
Vout  V 0.6 to 12V
Iout  A ≤ 25A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order 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 Package size: mm2:W x L (PKG)
TPS56221 Order now 4.5     14     0.6     12     25     1     300     1000     2.5     Adjustable Current Limit
Enable
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Forced PWM
Soft Start Adjustable
Over Current Protection
UVLO Fixed    
Voltage Mode     93     -40 to 125     Catalog     LSON-CLIP | 22     Converter     22LSON-CLIP: 30 mm2: 5 x 6 (LSON-CLIP | 22)    
TPS543B20 Order now 4     19     0.6     5.5     25     1     300     2000     3     Enable
Frequency Synchronization
Over Current Protection
Phase Interleaving
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Differential Remote Sense
Forced PWM
Soft Start Adjustable
Adjustable Current Limit    
Current Mode     70     -40 to 125     Catalog     LQFN-CLIP | 40     Converter     40LQFN-CLIP: 35 mm2: 5 x 7 (LQFN-CLIP | 40)    
TPS543C20 Order now 4     14     0.6     5.5     40     1     300     2000     4.3     Enable
Frequency Synchronization
Over Current Protection
Phase Interleaving
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Differential Remote Sense
Forced PWM
Soft Start Adjustable
Adjustable Current Limit    
Current Mode     70     -40 to 125     Catalog     LQFN-CLIP | 40     Converter     40LQFN-CLIP: 35 mm2: 5 x 7 (LQFN-CLIP | 40)    
TPS544C25 Order now 4.5     18     0.5     5     30     1     200     1000     7.7     Adjustable Current Limit
Enable
Frequency Synchronization
PMBus
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable
Voltage Margining
Differential Remote Sense
Over Current Protection
Adjustable Current Limit
Forced PWM
Soft Start Adjustable    
Voltage Mode     80     -40 to 125     Catalog     LQFN-CLIP | 40     Converter     40LQFN-CLIP: 35 mm2: 5 x 7 (LQFN-CLIP | 40)    
TPS548B22 Order now 1.5     18     0.6     5.5     25     1     425     1050     2     Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable
Differential Remote Sense
Forced PWM
Over Current Protection
Soft Start Adjustable    
D-CAP3     80