TPS54295 4.5 V to 18 V input, dual 2 A output, synchronous step-down converter, with adjustable soft start | TI.com

TPS54295
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4.5 V to 18 V input, dual 2 A output, synchronous step-down converter, with adjustable soft start

 

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Description

The TPS54295 is a dual, adaptive on-time D-CAP2 mode synchronous buck converter. The TPS54295 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS54295 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 TPS54295 to maintain high efficiency during lighter load conditions. The TPS54295 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 4.5 V to 18 V.

The TPS54295 is available in a 4.4 mm × 5 mm 16-pin HTSSOP (PWP) package and 4 mm × 4 mm 16-pin VQFN (RSA) package, designed to operate at 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 : 0.76 V to 7 V
  • Highly Efficient Integrated FETs Optimized for Low Duty Cycle Applications
    • 150 mΩ (High-Side) and 100 mΩ (Low-Side)
  • High Initial Reference Accuracy
  • Low-Side rDS(ON) Lossless Current Sensing
  • Adjustable Soft Start
  • Non-Sinking Prebiased Soft Start
  • 700-kHz Switching Frequency
  • Cycle-by-Cycle Overcurrent Limit Control
  • OCL, OVP, UVP, UVLO, and TSD Protections
  • Adaptive Gate Drivers With Integrated Boost PMOS Switch
  • OCP Constant Due to Thermally Compensated rDS(ON) With 4000 ppm/°C
  • 16-Pin HTSSOP, 16-pin VQFN
  • Auto-Skip Eco-mode™ for High Efficiency at Light Load

WEBENCH® Designer TPS54295

  Min   Max Range
Vin1  V 4.50 to 18.00V
Vout1  V 0.78 to 7V
Iout1  A ≤ 2.00A
 
Vin2  V 4.50 to 18.00V
Vout2  V 0.78 to 7V
Iout2  A ≤ 2.00A
 
Ambient Temp  °C -40.00 to 125.00°C

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)
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)    
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)    
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)    
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)    
TPS54495 Order now 2     4.5     18     4     1.2