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TPS542951

ACTIVE

4.5 V to 18 V input, 2 A / 3 A dual channel synchronous step-down converter, adjustable soft start

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Data sheet

TPS542951

ACTIVE
Data sheet Order now

Product details

Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 18 Type Converter Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700
Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 18 Type Converter Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700
HTSSOP (PWP) 16 32 mm² 5 x 6.4 VQFN (RSA) 16 16 mm² 4 x 4
  • 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 7.0V
  • Highly Efficient Integrated FETs Optimized
    for Low Duty Cycle Applications
    • 150 mΩ (High Side) and
      100 mΩ (Low Side)
  • High Initial Reference Accuracy
  • Supports Constant 2 A CH1 and
    3 A CH2 Load Current
  • Low-Side rDS(on) Loss-Less Current
    Sensing
  • Adjustable Soft Start
  • Non-Sinking Pre-Biased Soft Start
  • 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
  • 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 7.0V
  • Highly Efficient Integrated FETs Optimized
    for Low Duty Cycle Applications
    • 150 mΩ (High Side) and
      100 mΩ (Low Side)
  • High Initial Reference Accuracy
  • Supports Constant 2 A CH1 and
    3 A CH2 Load Current
  • Low-Side rDS(on) Loss-Less Current
    Sensing
  • Adjustable Soft Start
  • Non-Sinking Pre-Biased Soft Start
  • 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

The TPS542951 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS542951 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 TPS542951 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 TPS542951 to maintain high efficiency during lighter load conditions. The TPS542951 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 TPS542951 is available in a 4.4mm × 5.0mm 16 pin TSSOP (PWP) package, and 4mm × 4mm 16 pin VQFN (RSA) package, and is specified for an ambient temperature range from –40°C to 85°C.

The TPS542951 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS542951 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 TPS542951 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 TPS542951 to maintain high efficiency during lighter load conditions. The TPS542951 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 TPS542951 is available in a 4.4mm × 5.0mm 16 pin TSSOP (PWP) package, and 4mm × 4mm 16 pin VQFN (RSA) package, and is specified for an ambient temperature range from –40°C to 85°C.
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Technical documentation

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Type Title Date
* Data sheet 2A/3A Dual Channel Synchronous Step-Down Switcher With Integrated FET, TPS542951 datasheet (Rev. B) 08 Oct 2013
User guide TPS542951 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 12 Oct 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS542951EVM-057 — TPS542951 Evaluation Module

The Texas Instruments TPS542951EVM-057 evaluation module (EVM) helps designers evaluate the performance of the TPS542951 2A/3A Output, 18V Dual Synchronous Converter.
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS542951 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM638A.ZIP (124 KB) - PSpice Model
Download
Reference designs

PMP10878 — 90 - 134VAc input with isolated Flyback, dual output USB chargers, and LDO Reference Design

The PMP10878 is an isolated dual port USB charger powered from an AC source.  This design allows for up to 36W of power delivery through both USB chargers and the secondary side of a flyback.
Test report: PDF
Schematic: PDF
Package Pins Download
HTSSOP (PWP) 16 View options
VQFN (RSA) 16 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

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