TPS54283

ACTIVE

4.5V to 28V Input, Dual 2A Output, 300kHz Step-Down Converter with Internal Compensation

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 28 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 300 Features Enable, Phase Interleaving Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 25.2 Iq (typ) (µA) 1800 Duty cycle (max) (%) 90
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 28 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 300 Features Enable, Phase Interleaving Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 25.2 Iq (typ) (µA) 1800 Duty cycle (max) (%) 90
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 2 A
  • Two Fixed Switching Frequency Versions:
    • TPS54283: 300 kHz
    • TPS54286: 600 kHz
  • Two 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
  • 100-m Internal High-Side MOSFETs
  • Current Mode Control
  • Internal Compensation (See Page 16)
  • Pulse-by-Pulse Overcurrent Protection
  • Thermal Shutdown Protection at 148°C
  • 14-Pin PowerPAD™ HTSSOP package
  • APPLICATIONS
    • Set Top Box
    • Digital TV
    • Power for DSP
    • Consumer Electronics

PowerPAD Is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.

  • 4.5-V to 28-V Input Range
  • Output Voltage Range 0.8 V to 90% of Input Voltage
  • Output Current Up to 2 A
  • Two Fixed Switching Frequency Versions:
    • TPS54283: 300 kHz
    • TPS54286: 600 kHz
  • Two 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
  • 100-m Internal High-Side MOSFETs
  • Current Mode Control
  • Internal Compensation (See Page 16)
  • Pulse-by-Pulse Overcurrent Protection
  • Thermal Shutdown Protection at 148°C
  • 14-Pin PowerPAD™ HTSSOP package
  • APPLICATIONS
    • Set Top Box
    • Digital TV
    • Power for DSP
    • Consumer Electronics

PowerPAD Is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.

TPS54283 and TPS54286 are dual output non-synchronous buck converters capable of supporting 2-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 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 3 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 not needing the full load capability of both outputs.

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

TPS54283 and TPS54286 are dual output non-synchronous buck converters capable of supporting 2-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 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 3 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 not needing the full load capability of both outputs.

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

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Technical documentation

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Type Title Date
* Data sheet 2-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH SIDE MOSFET datasheet (Rev. C) 16 Oct 2007
User guide TPS54383 Step-Down Converter Evaluation Module User's Guide (Rev. D) PDF | HTML 13 Oct 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018

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

TPS54283 PSpice Transient Model

SLIM107.ZIP (200 KB) - PSpice Model
Simulation model

TPS54283 TINA-TI Average 3.3V Reference Design (Rev. A)

SLVJ011A.ZIP (165 KB) - TINA-TI Reference Design
Simulation model

TPS54283 TINA-TI Average 5V Reference Design

SLUM037.ZIP (165 KB) - TINA-TI Reference Design
Simulation model

TPS54283 TINA-TI Average Spice Model

SLUM038.ZIP (4 KB) - TINA-TI Spice Model
Simulation model

TPS54283 TINA-TI Transient Reference Design

SLUM073.TSC (1302 KB) - TINA-TI Reference Design
Simulation model

TPS54283 TINA-TI Transient Spice Model

SLUM074.TSM (25 KB) - TINA-TI Spice Model
Simulation model

TPS54283 Unencrypted PSpice Average Model Package (Rev. A)

SLUM092A.ZIP (115 KB) - PSpice Model
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 14 Ultra Librarian

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