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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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.76 Vout (Max) (V) 7 Iout (Max) (A) 2 Iq (Typ) (uA) 1300 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, Synchronous Rectification, Soft Start Adjustable Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 2 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 VQFN (RSA) 16 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)

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 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
open-in-new Find other Buck converters (integrated switch)

Description

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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Same functionality and pinout but is not an equivalent to the compared device:
TPS54295 ACTIVE 4.5 V to 18 V input, dual 2 A output, synchronous step-down converter, with adjustable soft start This is a dual-channel 2-A / 2-A output product.
TPS54395 ACTIVE 4.5V to 18V Input, Dual 3A Output, Synchronous Step-Down Converter This is a dual-channel 3-A / 3-A output product.
Similar but not functionally equivalent to the compared device:
TPS542941 ACTIVE 4.5 V to 18 V input, 2 A / 3 A dual channel synchronous step-down converter, 1 ms fixed soft start This is a dual-channel 2-A / 3-A output product with Power Good function.
TPS54328 ACTIVE 4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode™ This is a single 3-A output product.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet 2A/3A Dual Channel Synchronous Step-Down Switcher With Integrated FET, TPS542951 datasheet (Rev. B) Oct. 08, 2013
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guide TPS542951 Dual Channel SWIFT Evaluation Module Aug. 10, 2012

Design & development

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

Hardware development

EVALUATION BOARD Download
TPS542951 Evaluation Module
TPS542951EVM-057
49
Description
The Texas Instruments TPS542951EVM-057 evaluation module (EVM) helps designers evaluate the performance of the TPS542951 2A/3A Output, 18V Dual Synchronous Converter.
Features
  • 2 outputs
  • DCAP2 control
  • Soft Start
  • Non sinking pre-bias start up
  • Eco-mode

Design tools & simulation

SIMULATION MODEL Download
SLVM638A.ZIP (124 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
90 - 134VAc input with isolated Flyback, dual output USB chargers, and LDO Reference Design
PMP10878 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.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options
QFN (RSA) 16 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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