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TPS54383

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4.5V to 28V Input, Dual 3A Outputs, 300kHz Step-Down Converter with Internal Compensation

Product details

Vin (min) (V) 4.5 Vin (max) (V) 28 Vout (min) (V) 0.8 Vout (max) (V) 25.2 Iout (max) (A) 3 Iq (typ) (mA) 1.8 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 300 Features Enable, Phase Interleaving Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 90 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 28 Vout (min) (V) 0.8 Vout (max) (V) 25.2 Iout (max) (A) 3 Iq (typ) (mA) 1.8 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 300 Features Enable, Phase Interleaving Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 90 Type Converter
HTSSOP (PWP) 14 32 mm² 5 x 6.4
  • 4.5-V to 28-V Input Range
  • Output Voltage Range 0.8 V to 90% of Input
    Voltage
  • Output Current Up to 3 A
  • Two Fixed Switching Frequency Versions:
    • TPS54383: 300 kHz
    • TPS54386: 600 kHz
  • Three Selectable Levels of Overcurrent Protection
    (Output 2)
  • 0.8-V 1.5% Voltage Reference
  • 2.1-ms Internal Soft-Start
  • Dual PWM Outputs 180° Out-of-Phase
  • Ratiometric or Sequential Startup Modes Selectable
    by a Single Pin
  • 85-mΩ Internal High-Side MOSFETs
  • Current Mode Control
  • Internal Compensation
  • Pulse-by-Pulse Overcurrent Protection
  • Thermal Shutdown Protection at +148\xC2°C
  • 14-Pin PowerPAD™ HTSSOP package
  • 4.5-V to 28-V Input Range
  • Output Voltage Range 0.8 V to 90% of Input
    Voltage
  • Output Current Up to 3 A
  • Two Fixed Switching Frequency Versions:
    • TPS54383: 300 kHz
    • TPS54386: 600 kHz
  • Three Selectable Levels of Overcurrent Protection
    (Output 2)
  • 0.8-V 1.5% Voltage Reference
  • 2.1-ms Internal Soft-Start
  • Dual PWM Outputs 180° Out-of-Phase
  • Ratiometric or Sequential Startup Modes Selectable
    by a Single Pin
  • 85-mΩ Internal High-Side MOSFETs
  • Current Mode Control
  • Internal Compensation
  • Pulse-by-Pulse Overcurrent Protection
  • Thermal Shutdown Protection at +148\xC2°C
  • 14-Pin PowerPAD™ HTSSOP package

The TPS54383 and TPS54386 are dual output, non-synchronous buck converters capable of supporting 3-A output applications that operate from a 4.5-V to 28-V input supply voltage, and require output voltages between 0.8 V and 90% of the input voltage.

With an internally-determined operating frequency, soft-start time, and control loop compensation, these converters provide many features with a minimum of external components. Channel 1 overcurrent protection is set at 4.5 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP, or left floating. The setting levels are used to allow for scaling of external components for applications that do not need the full load capability of both outputs.

The outputs may be enabled independently, or may be configured to allow either ratio-metric or sequential startup sequencing. Additionally, the two outputs may be powered from different sources.

The TPS54383 and TPS54386 are dual output, non-synchronous buck converters capable of supporting 3-A output applications that operate from a 4.5-V to 28-V input supply voltage, and require output voltages between 0.8 V and 90% of the input voltage.

With an internally-determined operating frequency, soft-start time, and control loop compensation, these converters provide many features with a minimum of external components. Channel 1 overcurrent protection is set at 4.5 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP, or left floating. The setting levels are used to allow for scaling of external components for applications that do not need the full load capability of both outputs.

The outputs may be enabled independently, or may be configured to allow either ratio-metric or sequential startup sequencing. Additionally, the two outputs may be powered from different sources.

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Technical documentation

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Type Title Date
* Data sheet TPS5438x Dual 3-A Non-Synchronous Converters With Integrated High-Side MOSFET datasheet (Rev. C) PDF | HTML 15 Dec 2014
User guide TPS54383 Step-Down Converter Evaluation Module User's Guide (Rev. D) PDF | HTML 13 Oct 2021

Design & development

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

Evaluation board

TPS54383EVM — TPS54383 12V Input, Dual 5V and 3.3V Output, 2A Evaluation Module

The TPS54383EVM evaluation module (EVM) is a dual non-synchronous buck converter providing fixed 5.0 V and 3.3 V output at up to 2 A each from a 12 V input bus.

The EVM is designed to start up from a single supply, so no additional bias voltage is required for start-up. The module uses the TPS54383 (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS54383 TINA-TI Average 3.3V Reference Design

SLUM035.ZIP (165 KB) - TINA-TI Reference Design
Simulation model

TPS54383 TINA-TI Average 5V Reference Design

SLUM036.ZIP (165 KB) - TINA-TI Reference Design
Simulation model

TPS54383 TINA-TI Average Spice Model (Rev. A)

SLUC124A.ZIP (4 KB) - TINA-TI Spice Model
Simulation model

TPS54383 TINA-TI Transient Reference Design

SLUM071.TSC (1070 KB) - TINA-TI Reference Design
Simulation model

TPS54383 TINA-TI Transient Spice Model

SLUM072.TSM (25 KB) - TINA-TI Spice Model
Simulation model

TPS54383 Unencrypted PSpice Average Model Package (Rev. A)

SLUM089A.ZIP (122 KB) - PSpice Model
Simulation model

TPS54383 Unencrypted PSpice Transient Model Package (Rev. A)

SLLM057A.ZIP (184 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 (...)
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HTSSOP (PWP) 14 View options

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