TPS54429E 7V to 18V Input, 4.5A Synchronous Step-Down DCAP2 Mode Converter with Eco-Mode | TI.com

TPS54429E (ACTIVE) 7V to 18V Input, 4.5A Synchronous Step-Down DCAP2 Mode Converter with Eco-Mode

 

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Description

The TPS54429E is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54429E 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 TPS54429E uses the D-CAP2™ mode control which provides a very 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 TPS54429E to maintain high efficiency during lighter load conditions. The TPS54429E also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP, SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 7-V to 18-V VIN input. The output voltage can be programmed between 0.76V and 5.5V. The device also features an adjustable soft start time and a power good function. The TPS54429E is available in the 14-pin HTSSOP package and the 16 pin QFN package, designed to operate from –20°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: 7 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FET’s Optimized
    for Lower Duty Cycle Applications
    – 63 mΩ (High Side) and 55 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Power Good Output
  • Auto-Skip Eco-mode for High Efficiency at Light Load
  • 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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WEBENCH® Designer TPS54429E

  Min   Max Range
Vin  V 7.0 to 18.0V
Vout  V 0.765 to 5.5V
Iout  A ≤ 4.5A
Ambient Temp  °C -20 to 85°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) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS54429E Order now 7     18     0.76     5.5     4.5     1     700     700     0.85     Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
D-CAP2     98     -20 to 85     Catalog     HTSSOP | 14
QFN | 16    
Converter     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS54425 Order now 4.5     18     0.76     5.5     4     1     700     700     0.85     Enable
Power Good
Synchronous Rectification    
D-CAP2     90     -40 to 85     Catalog     HTSSOP | 14     Converter     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)    
TPS54426 Order now 4.5     18     0.76     5.5     4     1     700     700     0.85     Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
D-CAP2     90     -40 to 85     Catalog     HTSSOP | 14
QFN | 16    
Converter     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS54427 Order now 4.5     18     0.76     7     4     1     650     650     0.95     Enable
Synchronous Rectification    
Current Mode     65     -40 to 85     Catalog     SO PowerPAD | 8
VSON | 10    
Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
10VSON: 9 mm2: 3 x 3 (VSON | 10)    
TPS54428 Order now 4.5     18     0.76     7     4     1     650     650     0.95     Enable
Light Load Efficiency
Synchronous Rectification    
D-CAP2     65     -40 to 85     Catalog     SO PowerPAD | 8
VSON | 10