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

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

 

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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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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

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) Package Group Type Package size: mm2:W x L (PKG)
TPS56528 Order now 4.5     18     0.6     7     5     1     650     650     0.25     Enable
Light Load Efficiency
Synchronous Rectification
Soft Start Fixed    
D-CAP2     65     -40 to 125     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
TPS54527 Order now 4.5     18     0.76     6     5     1     650     650     0.9     Enable
Synchronous Rectification
Soft Start Adjustable    
D-CAP2     85     -40 to 85     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
TPS54528 Order now 4.5     18     0.76     6     5     1     650     650     0.9     Enable
Light Load Efficiency
Synchronous Rectification
Soft Start Adjustable    
D-CAP2     85     -40 to 85     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)