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TPS54394

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3A Dual Channel Synchronous Step-Down Switcher with Integrated FET

Data sheet
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3A Dual Channel Synchronous Step-Down Switcher with Integrated FET

TPS54394

ACTIVE
Data sheet Order now

Product details

Parameters

Vin (Min) (V) 4.8 Vin (Max) (V) 18 Vout (Min) (V) 0.76 Vout (Max) (V) 7 Iout (Max) (A) 3 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: 0.76 V to 7 V
  • Highly Efficient Integrated FETs Optimized for
    Low Duty Cycle Applications
    • 90 mΩ (High Side) and 60 mΩ (Low Side)
  • High Initial Reference Accuracy
  • Supports Constant 3 A at Both Channels
  • 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
  • Hiccup Timer for Overload Protection
  • OCL/UVLO/TSD Protections
  • 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 TPS54394 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54394 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 TPS54394 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 TPS54394 to maintain high efficiency during lighter load conditions. The TPS54394 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 TPS54394 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:
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.
TPS54494 ACTIVE 4A Dual Channel Synchronous Step-Down Switcher with Integrated FET This is a dual-channel 2-A / 4-A output product.
Similar but not functionally equivalent to the compared device:
TPS54328 ACTIVE 4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode™ This is a single 3-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 with adjustable soft start.

Technical documentation

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Type Title Date
* Data sheet 3A Dual Channel Synchronous Step-Down Switcher with Integrated FET datasheet (Rev. B) Aug. 20, 2013
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Technical article Evolution has been good for PMUs Aug. 14, 2013
Application note D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- Jan. 02, 2013
User guide TPS54394 Dual Channel DC/DC Converter Evaluation Module Jun. 12, 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
TPS54394 Evaluation Module
TPS54394EVM-057
document-generic User guide
49
Description

TPS54394EVM-057 evaluation module (EVM) helps designers evaluate the performance of the TPS54394. The TPS54394EVM-057 operates from a 4.5-V to 18-V supply and provides providing 3.3-V output up to 3 A on CH1 and 1.5-V up to 3 A on CH2. The main control loop of TPS54327 uses D-CAP2™ mode (...)

Features
  • Dual 3-A output
  • Fast load transient response
  • Low output ripple and allows ceramic output capacitor
  • Highly efficient integrated MOSFETs optimized for low duty cycle applications
  • Adjustable soft start
  • Pre-biased soft start
  • 700-kHz switching frequency operation
View details

Design tools & simulation

SIMULATION MODEL Download
SLVM613B.ZIP (69 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
  • (...)
View details

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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