TPS54495

ACTIVE

4.5V to 18V Input, Dual 4A/2A Output, Synchronous Step-Down Converter

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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.75 Vout (Max) (V) 7 Iout (Max) (A) 4 Iq (Typ) (uA) 1200 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: 0.76 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 4 A CH1 and 2 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
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Description

The TPS54495 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54495 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 TPS54495 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 TPS54495 to maintain high efficiency during lighter load conditions. The TPS54495 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 TPS54495 is available in a 4.4 mm × 5 mm 16-pin TSSOP (PWP) package and 4 mm x 4 mm 16-pin VQFN (RSA), and is designed to operate 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:
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:
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.
TPS54494 ACTIVE 4A Dual Channel Synchronous Step-Down Switcher with Integrated FET This is a dual-channel 2-A / 4-A output product with power-good function.

Technical documentation

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Type Title Date
* Data sheet 4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET, TPS54495 datasheet (Rev. A) May 29, 2013
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical article Evolution has been good for PMUs Aug. 14, 2013
User guide TPS54495 Dual Channel DC/DC Converter Evaluation Module Jun. 12, 2012

Design & development

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Reference designs

REFERENCE DESIGNS Download
Last Gasp Hold Up Energy Storage Solution
TIDA-00304 This solution stores and delivers "last gasp" energy for systems, such as SSDs, that require functionality for a short time after power loss in order to shut down in a controlled fashion. By storing holdup energy at higher than bus voltage the amount of capacitance can be reduced by up to 80 (...)
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CAD/CAE symbols

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

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