17V Input, 12A Synchronous Step-Down Regulator with Voltage Scaling - TPS56C20

TPS56C20 (ACTIVE)

17V Input, 12A Synchronous Step-Down Regulator with Voltage Scaling

 

Description

The TPS56X20 is a synchronous DC-DC converter IC (integrated circuit) with a voltage scaling control to power up micro-processors (MCUs) requiring core voltage (VCORE) tune-ups. After the initial power-up, the output voltage can be programmed/scaled by VID codes sent over an I2C compatible bus.

This step-down (buck) converter employs an adaptive on-time D-CAP2 mode control which provides a very fast transient response with no external components. Unlike traditional voltage-/current-mode controls, the D-CAP2 supports seamless transition between PWM mode for higher load and Eco-mode for light load. Eco-mode maintains high efficiency in light-load.

The TPS56X20 supports both ultra-low ESR ceramic capacitors and low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP. The device is optimized for a small 1.0µH to 2.2µH inductor saving PCB area.

The TPS56X20 devices are available in the HTSSOP package.

Features

  • D-CAP2 Control
    • Input Voltage Range: 4.5V to 17V
    • Switching Frequency: 500kHz
    • Optimized for a 1.0µH to 2.2µH Inductor
  • ±1% Output Voltage Accuracy
  • Features via I2C Compatible Interface
    • Output Voltage (VID):
      0.6V to 1.87V in 10mV
    • Auto-Skip Eco-mode ON/OFF (Light-load)
    • Current Limit Target: 40% to 160%
    • Enabling IC, Reading-back Power-good
    • Hiccup Mode Protection ON/OFF
  • IC Terminal Features
    • Start-up by Using External Resistors
      Output Voltage with VFB Pin: 0.6V to 1.87V
    • Adjustable Soft-start,
      Monotonic Pre-Biased Start-up
    • Power-good
    • I2C Address Programming (2bits)
  • Cycle-by-Cycle Overcurrent Limiting Control
  • Thermal Shutdown (TSD)
  • Undervoltage Lockout (UVLO)
  • TSSOP Package (PWP) with PowerPAD

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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
TPS56C20 TPS56520 TPS56720 TPS56920
4.5    4.5    4.5    4.5   
17    17    17    17   
0.6    0.6    0.6    0.6   
1.87    1.87    1.87    1.87   
12    5    7    9   
1    1    1    1   
500    500    500    500   
500    500    500    500   
0.92    0.92    0.92    0.92   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining   
D-CAP2      D-CAP2    D-CAP2   
80    80    80    80   
-40 to 85    -40 to 85    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog    Catalog   
HTSSOP    HTSSOP    HTSSOP    HTSSOP   
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WEBENCH® Designer TPS56C20

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.6 to 1.87V
Iout  A ≤ 12A
Ambient Temp  °C -40 to 125°C


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