TPS54228 具有轻载效率的 4.5V 至 18V 输入、2A 同步降压转换器 | 德州仪器 TI.com.cn

TPS54228 (正在供货)

具有轻载效率的 4.5V 至 18V 输入、2A 同步降压转换器

具有轻载效率的 4.5V 至 18V 输入、2A 同步降压转换器 - TPS54228
 

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描述

The TPS54228 device is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54228 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 TPS54228 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 TPS54228 to maintain high efficiency during lighter load conditions. The TPS54228 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 7 V. The device also features an adjustable soft start time. The TPS54228 is available in 8-pin SO , 8-pin SOIC, and 10-pin VSON packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

特性

  • 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 7 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 155 mΩ (High-Side) and 108 mΩ (Low-Side)
  • High Efficiency, Less than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Prebiased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-by-Cycle Overcurrent Limit
  • Auto-Skip Eco-Mode™ for High Efficiency at Light Load

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参数 与其它产品相比 降压转换器 (集成开关)

 
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
TPS54228 TPS54227 TPS54327 TPS54328 TPS54427 TPS54428 TPS54627 TPS54628 TPS56428 TPS56528
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    
0.76     0.76     0.76     0.76     0.76     0.76     0.76     0.76     0.6     0.76    
7     7     7     7     7     7     5.5     5.5     5.5     5.5    
2     2     3     3     4     4     6     6     4     5    
1     1     1     1     1     1     1     1     1     1    
700     700     700     700     650     650     650     650     650     650    
700     700     700     700     650     650     650     650     650     650    
0.8     0.8     0.8     0.8     0.95     0.95     0.95     0.95     0.25     0.25    
Enable
Light Load Efficiency
Synchronous Rectification    
Enable
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
Synchronous Rectification    
D-CAP2     D-CAP2     D-CAP2     D-CAP2     Current Mode     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP2    
90     90     90     90     95     95     85     85     85     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 125    
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