Product details

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
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
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: 0.76 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
  • 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

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.

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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Technical documentation

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Type Title Date
* Data sheet 3A Dual Channel Synchronous Step-Down Switcher with Integrated FET datasheet (Rev. B) 20 Aug 2013
User guide TPS54394 Step-Down Converter Evaluation Module User's Guide (Rev. A) 29 Sep 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Technical article Evolution has been good for PMUs 14 Aug 2013
Application note D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- 02 Jan 2013

Design & development

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Evaluation board

TPS54394EVM-057 — TPS54394 Evaluation Module

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 (...)

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Simulation model

TPS54394 Unencrypted PSpice Transient Model Package (Rev. B)

SLVM613B.ZIP (69 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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

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