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

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Parametrics Compare all products in Buck Converter (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)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Approx. Price (US$)
TPS56121 TPS53353 TPS53355 TPS548D22 TPS56221
4.5    1.5    1.5    1.5    4.5   
14    15    15    16    14   
0.6    0.6    0.6    0.6    0.6   
12    5.5    5.5    5.5    12   
15    20    30    40    25   
1    1    1    1    1   
300    250    250    425    300   
1000    1000    1000    1050    1000   
2.5    0.32    0.32    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   
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification   
Voltage Mode    D-CAP    D-CAP    D-CAP3    Voltage Mode   
93    90    90    80    93   
-40 to 125    -40 to 85    -40 to 85    -40 to 125    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Catalog   
LSON-CLIP    LSON-CLIP    LSON-CLIP    LQFN-CLIP    LSON-CLIP   
3.50 | 1ku    3.50 | 1ku    3.75 | 1ku    4.19 | 1ku    3.75 | 1ku   
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WEBENCH® Designer 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


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