4.5V to 18V Input, 5-A Synchronous Step-Down Converter with Advanced Eco-mode™ - TPS56528

TPS56528 (ACTIVE)

4.5V to 18V Input, 5-A Synchronous Step-Down Converter with Advanced Eco-mode™

 

Recommended alternative parts

  • TPS54628  -  Looking for a device with more output current? Try the TPS54628.
  • TPS56428  -  Looking for a device with less output current? Try the TPS56428.
  • TPS54527  -  Looking for a device with non Eco-mode™? Try the TPS54527.
  • TPS54528  -  Looking for a device with Eco-mode™? Try the TPS54528.
  • TPS54531  -  Looking for a device with higher input voltage? Try theTPS54531.
  • TPS54526  -  Looking for a device with Power-Good? Try the TPS54526.

Description

The TPS56528 device is an adaptive on-time D-CAP2&rade; mode synchronous buck converter. The TPS56528 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 TPS56528 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 advanced Eco-Mode™ operation at light loads. Advanced Eco-Mode™ allows the TPS56528 to maintain high efficiency during lighter load conditions. The TPS56528 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 0.6 V and 7 V. The device also features a fixed 1-ms soft-start time and power good output. The TPS56528 is available in the 8-pin SO PowerPAD™ 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: 0.6 V to 7 V
  • Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications –68 mΩ (High-Side) and 37 mΩ (Low-Side)
  • High Efficiency, Less Than 10 µA at Shutdown
  • High Initial Band-Gap Reference Accuracy
  • Prebiased Soft Start
  • 650-kHz Switching Frequency (fSW)
  • Cycle-By-Cycle Overcurrent Limit
  • Advanced Auto-Skip Eco-Mode™ for High Efficiency at Light Load
  • Power Good Output
  • Fixed Soft Start: 1 ms

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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)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS56528 TPS54227 TPS54228 TPS54327 TPS54328 TPS54427 TPS54428 TPS54527 TPS54528 TPS54627 TPS54628 TPS56428 TPS56628
4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5   
18    18    18    18    18    18    18    18    18    18    18    18    18   
0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.6    0.76   
5.5    7    7    7    7    7    7    6    6    5.5    5.5    5.5    5.5   
5    2    2    3    3    4    4    5    5    6    6    4    6   
1    1    1    1    1    1    1    1    1    1    1    1    1   
650    700    700    700    700    650    650    650    650    650    650    650    650   
650    700    700    700    700    650    650    650    650    650    650    650    650   
0.25    0.8    0.8    0.8    0.8    0.95    0.95    0.9    0.9    0.95    0.95    0.25    0.95   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    Current Mode    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2   
85    90    90    90    90    95    95    85    85    85    85    85    85   
-40 to 125    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 125    -40 to 125    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
SO PowerPAD    SO PowerPAD
VSON   
SO PowerPAD
SOIC
VSON   
SO PowerPAD
VSON   
SO PowerPAD
VSON   
SO PowerPAD
VSON   
SO PowerPAD
VSON   
SO PowerPAD    SO PowerPAD    SO PowerPAD    SO PowerPAD    SO PowerPAD
VQFN   
SO PowerPAD   
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WEBENCH® Designer TPS56528

  Min   Max Range
Vin  V 4.5 to 18.0V
Vout  V 0.6 to 7V
Iout  A ≤ 5A
Ambient Temp  °C -40 to 125°C


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