TPS65283

ACTIVE

4.5 V to 18 V input, 3.5 A / 2.5 A, synchronous dual buck converter in FCCM mode

Product details

Regulated outputs (#) 2 Configurability Hardware configurable, User programmable Vin (min) (V) 4.5 Vin (max) (V) 18 Vout (min) (V) 0.6 Vout (max) (V) 0.5 Iout (max) (A) 3.5 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Soft-start fixed, Synchronous rectification, UVLO adjustable Step-up DC/DC converter 0 Step-down DC/DC converter 2 Step-down DC/DC controller 0 Step-up DC/DC controller 0 LDO 0 Iq (typ) (mA) 0.5 Rating Catalog Switching frequency (max) (kHz) 600 Operating temperature range (°C) -40 to 125 Shutdown current (ISD) (typ) (µA) 5.5 Switching frequency (typ) (kHz) 500
Regulated outputs (#) 2 Configurability Hardware configurable, User programmable Vin (min) (V) 4.5 Vin (max) (V) 18 Vout (min) (V) 0.6 Vout (max) (V) 0.5 Iout (max) (A) 3.5 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Soft-start fixed, Synchronous rectification, UVLO adjustable Step-up DC/DC converter 0 Step-down DC/DC converter 2 Step-down DC/DC controller 0 Step-up DC/DC controller 0 LDO 0 Iq (typ) (mA) 0.5 Rating Catalog Switching frequency (max) (kHz) 600 Operating temperature range (°C) -40 to 125 Shutdown current (ISD) (typ) (µA) 5.5 Switching frequency (typ) (kHz) 500
VQFN (RGE) 24 16 mm² 4 x 4
  • Buck Converter
    • Wide input voltage range 4.5 to 18 V
    • Integrated dual buck converter, maximum continuous current 3.5 A (Buck1) / 2.5 A (Buck2)
    • Feedback reference voltage 0.6 V ±1%
    • Adjustable switching frequency 200 kHz to
      2 MHz
    • Internal built soft start time 2.4 ms
    • External clock synchronization
    • Cycle-by-cycle current limit
    • Power good indicator for each buck
    • Continuous current mode (TPS65283) or pulse skipping mode (PSM) (TPS65283-1) at light load
  • Power distribution switch
    • Integrated a power distribution switch with on-resistance 60 mΩ
    • Operating input voltage range 2.4 to 6 V
    • Adjustable current limiting up to 2.7 A
    • Current-limit accuracy ±10% at 1.25 A (typical)
    • Auto recovery overcurrent protection
    • Reverse input to output voltage protection
    • Overtemperature protection
    • 24-lead VQFN (RGE) 4-mm × 4-mm package
  • Buck Converter
    • Wide input voltage range 4.5 to 18 V
    • Integrated dual buck converter, maximum continuous current 3.5 A (Buck1) / 2.5 A (Buck2)
    • Feedback reference voltage 0.6 V ±1%
    • Adjustable switching frequency 200 kHz to
      2 MHz
    • Internal built soft start time 2.4 ms
    • External clock synchronization
    • Cycle-by-cycle current limit
    • Power good indicator for each buck
    • Continuous current mode (TPS65283) or pulse skipping mode (PSM) (TPS65283-1) at light load
  • Power distribution switch
    • Integrated a power distribution switch with on-resistance 60 mΩ
    • Operating input voltage range 2.4 to 6 V
    • Adjustable current limiting up to 2.7 A
    • Current-limit accuracy ±10% at 1.25 A (typical)
    • Auto recovery overcurrent protection
    • Reverse input to output voltage protection
    • Overtemperature protection
    • 24-lead VQFN (RGE) 4-mm × 4-mm package

The TPS65283, TPS65283-1 in thermally-enhanced 4-mm × 4-mm VQFN package is a full featured
4.5- to 18-V Vin, 3.5-A/2.5-A output current synchronous step down DC-DC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates one N-channel MOSFET power switches for power distribution systems. This device provides a total power distribution solution, where precision current limiting and fast protection response are required.

The 60-mΩ independent power distribution switch limits the output current to a programmable current limit threshold by using an external resistor. The current limit accuracy can be achieved as tight as ±10% at typical 1.25 A. The nFAULT output asserts low under overcurrent and reverse-voltage conditions.

Constant frequency peak current mode control in DC-DC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle overcurrent protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading conditions. When die temperature exceeds thermal over loading threshold, the overtemperature protection shuts down the device.

The TPS65283, TPS65283-1 in thermally-enhanced 4-mm × 4-mm VQFN package is a full featured
4.5- to 18-V Vin, 3.5-A/2.5-A output current synchronous step down DC-DC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates one N-channel MOSFET power switches for power distribution systems. This device provides a total power distribution solution, where precision current limiting and fast protection response are required.

The 60-mΩ independent power distribution switch limits the output current to a programmable current limit threshold by using an external resistor. The current limit accuracy can be achieved as tight as ±10% at typical 1.25 A. The nFAULT output asserts low under overcurrent and reverse-voltage conditions.

Constant frequency peak current mode control in DC-DC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle overcurrent protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading conditions. When die temperature exceeds thermal over loading threshold, the overtemperature protection shuts down the device.

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Technical documentation

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Type Title Date
* Data sheet TPS65283, TPS65283-1 4.5-V to 18-V Input Voltage, Maximum 3.5-A and 2.5-A Current, Synchronous Dual Buck Converter With Power Distribution Switch datasheet (Rev. E) PDF | HTML 27 Jan 2019

Design & development

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Evaluation board

TPS65283EVM-646 — TPS65283EVM Evaluation Module

The TPS65283EVM-646 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65283. The max DC output current of this EVM is 3.5A and 2.5A. -The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features. -It also has EN1, (...)

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

TPS65283 TINA-TI Average Reference Design

SLVMC78.TSC (1208 KB) - TINA-TI Reference Design
Simulation model

TPS65283 TINA-TI Average Spice Model

SLVMC79.ZIP (8 KB) - TINA-TI Spice Model
Simulation model

TPS65283 Unencrypted PSpice Average Model Package (Rev. A)

SLVMAD4A.ZIP (89 KB) - PSpice Model
Package Pins Download
VQFN (RGE) 24 View options

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