TPS54327 4.5V 至 18V 输入,3A 同步降压 SWIFT™ 转换器 | 德州仪器 TI.com.cn

TPS54327 (正在供货)

4.5V 至 18V 输入,3A 同步降压 SWIFT™ 转换器

 

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描述

The TPS54327 device is an adaptive on-time D-CAP2™ mode synchronous buck converter. TheTPS54327 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54327 uses the D-CAP2 mode control which provides a fast transient response with no external compensation components. The TPS54327 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 TPS54327 is available in the 8-pin DDA package and 10-pin DRC, and is designed to operate from –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
    – 100 mΩ (High-Side) and 70 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
  • APPLICATIONS
    • Wide Range of Applications for Low Voltage
      System
      • Digital TV Power Supply
      • High Definition Blu-ray Disc™ Players
      • Networking Home Terminal
      • Digital Set Top Box (STB)

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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
Type
TPS54327 TPS54227 TPS54228 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    
3     2     2     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
Synchronous Rectification    
Enable
Synchronous Rectification    
Enable
Light Load Efficiency
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    
65     65     65     65     65     65     65     65     65     65    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85