TPS56628 4.5V to 18V Input, 6-A Synchronous Step-Down Converter with Eco-mode™ | TI.com

TPS56628 (ACTIVE)

4.5V to 18V Input, 6-A Synchronous Step-Down Converter with Eco-mode™

 

Description

The TPS56628 is an adaptive on-time D-CAP2 mode synchronous buck converter. The TPS56628 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS56628 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS56628 to maintain high efficiency during lighter load conditions. The TPS56628 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 5.5 V. The TPS56628 is available in the 8-pin DDA package, and designed to operate from –40°C to 85°C.

Features

  • D-CAP2 Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 36 mΩ (High Side) and 28 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Pre-Biased Soft Start
  • 650-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Auto-Skip Eco-mode for High Efficiency at Light Load
  • Power Good Output
  • Fixed Soft Start: 1.0 ms

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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
Package size: mm2:W x L (PKG)
TPS56628 TPS51362 TPS53318 TPS53319 TPS53353 TPS53355 TPS56428 TPS56520 TPS56528 TPS566250 TPS56720
4.5     3     1.5     1.5     1.5     1.5     4.5     4.5     4.5     4.5     4.5    
18     22     22     22     15     15     18     17     18     17     17    
0.76     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6    
5.5     2     5.5     5.5     5.5     5.5     5.5     1.87     7     1.87     1.87    
6     10     8     14     20     30     4     5     5     6     7    
1     1     1     1     1     1     1     1     1     1     1    
650     800     250     250     250     250     650     500     650     500     500    
650     800     1000     1000     1000     1000     650     500     650     500     500    
0.95     0.1     0.32     0.32     0.32     0.32     0.25     0.92     0.25     0.9     0.92    
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Power Good
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
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining
Adaptive/Dynamic Voltage Scaling    
Enable
Light Load Efficiency
Synchronous Rectification    
Enable
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable
Adaptive/Dynamic Voltage Scaling    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining
Adaptive/Dynamic Voltage Scaling    
D-CAP2     D-CAP2     D-CAP     D-CAP     D-CAP     D-CAP     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP2    
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