TPS54494 4A Dual Channel Synchronous Step-Down Switcher with Integrated FET | TI.com

TPS54494
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4A Dual Channel Synchronous Step-Down Switcher with Integrated FET

 

Recommended alternative parts

  • TPS54495  -  Looking for a device soft-start? Try the TPS54495.
  • TPS54394  -  Looking for a device with less output current? Try the TPS54394.
  • TPS54428  -  Looking for a single output device? Try the TPS54428.

Description

The TPS54494 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54494 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS54494 use 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 TPS54494 to maintain high efficiency during lighter load conditions. The TPS54494 is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5V to 18V.

The TPS54494 is available in a 4.4 mm × 5 mm 16-pin TSSOP (PWP) and 4 mm × 4 mm 16-pin VQFN (RSA) package, and is specified for an ambient temperature range from –40°C to 85°C.

Features

  • D-CAP2 Control Mode
    • Fast Transient Response
    • No External Parts Required For Loop Compensation
    • Compatible with Ceramic Output Capacitors
  • Wide Input Voltage Range : 4.5 V to 18 V
  • Output Voltage Range: 0.76V to 7V
  • Highly Efficient Integrated FETs Optimized
    for Low Duty Cycle Applications
    • 90 mΩ (High Side) and 60 mΩ
      (Low Side)
  • High Initial Reference Accuracy
  • 4A CH1 / 2A CH2 Continuous Load Current
  • Low-Side rDS(on) Loss-Less
    Current Sensing
  • Fixed Soft Start : 1 ms
  • Non-Sinking Pre-Biased Soft Start
  • Powergood
  • 700 kHz Switching Frequency
  • Cycle-by-Cycle Over-Current Limit Control
  • OCL/UVLO/TSD Protections
  • Hiccup Timer for Overload Protection
  • Adaptive Gate Drivers with Integrated
    Boost PMOS Switch
  • OCP Constant Due To Thermally Compensated
    rDS(on) with 4000ppm/°C
  • 16-Pin HTSSOP, 16-Pin VQFN
  • Auto-Skip Eco-mode for High Efficiency at Light Load

WEBENCH ® TPS54494
    Min   Max   Range  
  Vin1 - V    4.5 - 18.00V  
  Vout1 V    0.76 - 7.00  
  Iout1 A    ≤ 4.0A  
Select Input 1

  Vin2 - V    4.50 - 18.0V  
  Vout2 V    0.76 - 7.00V  
  Iout2 A    ≤ 2.00A  
Select Input 2

  Ambient Temp  °C    ≤ 100 °C  
 
What are WEBENCH ® tools?

Parametrics

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Part number Order Regulated outputs (#) Vin (Min) (V) Vin (Max) (V) Iout (Max) (A) Iq (Typ) (mA) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
TPS54494 Order now 2     4.5     18     4     1.2     Enable
Light Load Efficiency
Power Good
Synchronous Rectification
Soft Start Fixed    
Catalog     -40 to 85     HTSSOP | 16
QFN | 16    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS54294 Order now 2     4.5     18     2     1.3     Enable
Light Load Efficiency
Power Good
Synchronous Rectification
Soft Start Fixed
Power Good    
Catalog     -40 to 85     HTSSOP | 16
QFN | 16    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS542941 Order now 2     4.5     18     2     1.3     Enable
Light Load Efficiency
Power Good
Synchronous Rectification
Soft Start Fixed    
Catalog     -40 to 85     HTSSOP | 16
QFN | 16    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS54295 Order now 2     4.5     18     2     1.3     Enable
Light Load Efficiency
Synchronous Rectification
Soft Start Adjustable    
Catalog     -40 to 85     HTSSOP | 16
QFN | 16    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS542951 Order now 2     4.5     18     2     1.3     Enable
Light Load Efficiency
Synchronous Rectification
Soft Start Adjustable    
Catalog     -40 to 85     HTSSOP | 16
QFN | 16    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS54394 Order now 2     4.8     18     3     1.2     Enable
Light Load Efficiency
Power Good
Synchronous Rectification
Soft Start Fixed    
Catalog     -40 to 85     HTSSOP | 16
QFN | 16    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS54395 Order now 2     4.5     18     3     1.2     Enable
Light Load Efficiency
Synchronous Rectification
Multiple Outputs
Soft Start Adjustable    
Catalog     -40 to 85     HTSSOP | 16
QFN | 16    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)    
TPS54495 Order now 2     4.5     18     4     1.2     Enable