TPS54494

ACTIVE

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

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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) 4 Iq (Typ) (mA) 1.2 Iq (Typ) (uA) 1200 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, Power Good, Synchronous Rectification, Soft Start Fixed 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 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
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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.

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Same functionality and pinout but is not an equivalent to the compared device:
TPS54394 ACTIVE 3A Dual Channel Synchronous Step-Down Switcher with Integrated FET This is a dual-channel 3-A / 3-A output product.
Similar but not functionally equivalent to the compared device:
TPS54428 ACTIVE 4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT™ Converter with Eco-mode™ This is a single 4-A output product.
TPS54495 ACTIVE 4.5V to 18V Input, Dual 4A/2A Output, Synchronous Step-Down Converter This is a dual-channel 2-A / 4-A output product with adjustable soft start.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet 4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET, TPS54494 datasheet (Rev. B) Aug. 20, 2013
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Evolution has been good for PMUs Aug. 14, 2013
User guides TPS54494 Evaluation Module Feb. 13, 2012

Design & development

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

Hardware development

EVALUATION BOARDS Download
TPS54494 Evaluation Module
TPS54494EVM-057
document-generic User guide
49
Description
The Texas Instruments TPS54494EVM-057 evaluation module (EVM) helps designers evaluate the performance of the TPS54494 4A Dual Channel Synchronous Step-Down Switcher with Integrated FET.
Features
  • 2 outputs
  • DCAP2 control
  • Power Good
  • Non-sinking pre-bias start up
  • Eco-mode

Design tools & simulation

SIMULATION MODELS Download
SLVM612A.ZIP (361 KB) - PSpice Model
SIMULATION TOOLS 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
  • (...)

CAD/CAE symbols

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

Ordering & quality

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