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TPS65279

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4.5-V to 18-V Input, Dual 5-A Synchronous Step-Down Converter

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Data sheet

TPS65279

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 18 Vout (min) (V) 0.6 Vout (max) (V) 15 Iout (max) (A) 5 Iq (typ) (mA) 10 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1600 Features Enable, Light Load Efficiency, Phase Interleaving, Soft Start Adjustable Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 95 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 18 Vout (min) (V) 0.6 Vout (max) (V) 15 Iout (max) (A) 5 Iq (typ) (mA) 10 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1600 Features Enable, Light Load Efficiency, Phase Interleaving, Soft Start Adjustable Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 95 Type Converter
HTSSOP (DAP) 32 89.1 mm² 11 x 8.1 VQFN (RHH) 36 36 mm² 6 x 6
  • 4.5-V to 18-V Wide Input Voltage Range
  • Programmable Slew Rate Control for Output
    Voltage Transition
  • Up to 5-A Maximum Continuous Output Current in
    Buck 1 and Buck 2
  • Buck 1 and Buck 2 can be Paralleled to Deliver up
    to 10-A Current
  • Pulse Skipping Mode to Achieve High Efficiency in
    Light Load
  • Adjustable Switching Frequency
    200 kHz to 1.6 MHz Set by External Resistor
  • Dedicated Enable and Soft-Start for Each Buck
  • Peak Current-Mode Control With Simple
    Compensation Circuit
  • Cycle-by-Cycle Overcurrent Protection
  • 180° Out-of-Phase Operation to Reduce Input
    Capacitance and Power Supply Induced Noise
  • Over Temperature Protection
  • Available in 32-Pin Thermally Enhanced HTSSOP
    (DAP) and 36-Pin VQFN 6-mm × 6-mm (RHH)
    Packages
  • 4.5-V to 18-V Wide Input Voltage Range
  • Programmable Slew Rate Control for Output
    Voltage Transition
  • Up to 5-A Maximum Continuous Output Current in
    Buck 1 and Buck 2
  • Buck 1 and Buck 2 can be Paralleled to Deliver up
    to 10-A Current
  • Pulse Skipping Mode to Achieve High Efficiency in
    Light Load
  • Adjustable Switching Frequency
    200 kHz to 1.6 MHz Set by External Resistor
  • Dedicated Enable and Soft-Start for Each Buck
  • Peak Current-Mode Control With Simple
    Compensation Circuit
  • Cycle-by-Cycle Overcurrent Protection
  • 180° Out-of-Phase Operation to Reduce Input
    Capacitance and Power Supply Induced Noise
  • Over Temperature Protection
  • Available in 32-Pin Thermally Enhanced HTSSOP
    (DAP) and 36-Pin VQFN 6-mm × 6-mm (RHH)
    Packages

TPS65279 is a monolithic dual synchronous buck converter with wide 4.5-V to 18-V operating input voltage range that encompassed most intermediate bus voltage operating off 5-, 9-, 12- or 15-V power bus or battery. The converter with constant frequency peak current mode control is designed to simplify its application while giving the designers options to optimize their usage according to the target applications.

Two bucks in TPS65279 can be paralleled to delivery up to 10-A load current by using current sharing mode, connect ISHARE pin high. Two phase operation in current sharing reduces system filtering capacitance and inductance, alleviates EMI and improves output voltage ripple and noise.

TPS65279 features a dedicated enable pin. An independent soft-start pin provides flexibility in power up programmability. Constant frequency peak current mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle overcurrent protection and hiccup mode operation limit MOSFET power dissipation in short circuit or over loading fault conditions.

Low-side reverse overcurrent protection also prevents excessive sinking current from damaging the converter. TPS65279 also features a light load pulse skipping mode (PSM) controlled by MODE pin configuration.

The TPS65279 is available in a 32-pin thermally-enhanced HTSSOP (DAP) package and 36-pin 6-mm × 6-mm VQFN (RHH) package.

TPS65279 is a monolithic dual synchronous buck converter with wide 4.5-V to 18-V operating input voltage range that encompassed most intermediate bus voltage operating off 5-, 9-, 12- or 15-V power bus or battery. The converter with constant frequency peak current mode control is designed to simplify its application while giving the designers options to optimize their usage according to the target applications.

Two bucks in TPS65279 can be paralleled to delivery up to 10-A load current by using current sharing mode, connect ISHARE pin high. Two phase operation in current sharing reduces system filtering capacitance and inductance, alleviates EMI and improves output voltage ripple and noise.

TPS65279 features a dedicated enable pin. An independent soft-start pin provides flexibility in power up programmability. Constant frequency peak current mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle overcurrent protection and hiccup mode operation limit MOSFET power dissipation in short circuit or over loading fault conditions.

Low-side reverse overcurrent protection also prevents excessive sinking current from damaging the converter. TPS65279 also features a light load pulse skipping mode (PSM) controlled by MODE pin configuration.

The TPS65279 is available in a 32-pin thermally-enhanced HTSSOP (DAP) package and 36-pin 6-mm × 6-mm VQFN (RHH) package.
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Technical documentation

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Type Title Date
* Data sheet TPS65279 4.5- to 18-V Input, 5-A/5-A Dual Synchronous Step-Down Converter With Current Sharing datasheet (Rev. C) PDF | HTML 14 May 2015
Application note Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) PDF | HTML 01 Apr 2019
User guide 4.5V TO 18V Input, 5A/5A Dual Synchronous Step-Down Converter, TPS65279DAPR 21 Aug 2013
User guide 4.5V TO 18V Input, 6A/3.5A Dual Synchronous Step-Down Converter, TPS65279RHHR 21 Aug 2013

Design & development

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

Evaluation board

TPS65279EVM — TPS65279EVM Evaluation Module

The Texas Instruments TPS65279EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65279 Step-Down Converter. The TPS65279 is a monolithic dual synchronous buck converter with a wide 4.5V to 18V operating input voltage range that encompasses most intermediate (...)

User guide: PDF
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Simulation model

TPS65279V Unencrypted PSpice Average Model Package (Rev. A)

SLVMA03A.ZIP (52 KB) - PSpice Model
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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 (...)
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Reference designs

PMP4379 — DC-DC POL 12V In Dual Output - 1.2V 5A Reference Design

The PMP4379 is a POL module reference design suitable for DSP & FPGA applications with a DC input of 4.5V – 15V. Detailed data is provided. The output voltage could be trimmed by resistors over a range from 0.7V to 5V. A typical application is for dual 1.2V/5A.
Test report: PDF
Schematic: PDF
Package Pins Download
HTSSOP (DAP) 32 View options
VQFN (RHH) 36 View options
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