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AC/DC & DC/DC converters (integrated FET)

TPS65286

AKTIV

Synchroner Abwärtswandler, 4,5 bis 28 V Eingangsspannung, 6 A Ausgang, mit Zweifach-Lastschaltern

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TPS65286

AKTIV
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Produktdetails

Iout (max) (A) 6 Vin (min) (V) 4.5 Vin (max) (V) 28 Topology Buck Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 600 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Soft-start adjustable, Synchronous rectification, UVLO adjustable Vout (min) (V) 0.6 Vout (max) (V) 25 Rating Catalog Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0008
Iout (max) (A) 6 Vin (min) (V) 4.5 Vin (max) (V) 28 Topology Buck Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 600 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Soft-start adjustable, Synchronous rectification, UVLO adjustable Vout (min) (V) 0.6 Vout (max) (V) 25 Rating Catalog Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0008
VQFN (RHD) 28 25 mm² 5 x 5
  • Integrated Dual Power Distribution Switches:
    • 2.5 V to 6 V Operating Input Voltage Range
    • Integrated Back-to-Back Power MOSFETs With
      Typical 100-mΩ On-Resistance
    • Adjustable Current Limiting from 75 mA to
      2.7 A
    • ±6% Current-Limit Accuracy at 1.2 A (Typical)
    • Latch-off Over Current Protection Versions
    • Reverse Input-Output Voltage Protection
    • Built-In Soft-Start
  • Integrated Buck DCDC Converter:
    • 4.5 V to 28 V Wide Input Voltage Range
    • Maximum Continuous 6-A Output Load Current
    • Feedback Reference Voltage 0.6 V ±1%
    • Fixed 500-kHz Switching Frequency
    • Built-In Internal Soft-Start Time: 1 ms
    • Cycle-by-Cycle Current Limit
    • Adjustable Current Limit Threshold
    • Output Over-Voltage Protection
    • External Clock Synchronization
    • Over Temperature Protection
  • Integrated Dual Power Distribution Switches:
    • 2.5 V to 6 V Operating Input Voltage Range
    • Integrated Back-to-Back Power MOSFETs With
      Typical 100-mΩ On-Resistance
    • Adjustable Current Limiting from 75 mA to
      2.7 A
    • ±6% Current-Limit Accuracy at 1.2 A (Typical)
    • Latch-off Over Current Protection Versions
    • Reverse Input-Output Voltage Protection
    • Built-In Soft-Start
  • Integrated Buck DCDC Converter:
    • 4.5 V to 28 V Wide Input Voltage Range
    • Maximum Continuous 6-A Output Load Current
    • Feedback Reference Voltage 0.6 V ±1%
    • Fixed 500-kHz Switching Frequency
    • Built-In Internal Soft-Start Time: 1 ms
    • Cycle-by-Cycle Current Limit
    • Adjustable Current Limit Threshold
    • Output Over-Voltage Protection
    • External Clock Synchronization
    • Over Temperature Protection

The TPS65286 is a full featured 4.5-V to 28-V VIN, 6-A output current synchronous step down DCDC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates dual 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.

A dual 100-m&937; independent power distribution switch limits the output current to a programmable current limit threshold between typical 50 mA~2.7 A by using an external resistor. The current limit accuracy can be achieved as tightly as ±6% at typical 1.2 A. The nFAULT output asserts low under over-current and reverse-voltage conditions.

Constant frequency peak current mode control in the DCDC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle over-current protection and operating in hiccup mode limit MOSFET power dissipation. When die temperature exceeds thermal over loading threshold, the over temperature protection shuts down the device.

The TPS65286 is a full featured 4.5-V to 28-V VIN, 6-A output current synchronous step down DCDC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates dual 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.

A dual 100-m&937; independent power distribution switch limits the output current to a programmable current limit threshold between typical 50 mA~2.7 A by using an external resistor. The current limit accuracy can be achieved as tightly as ±6% at typical 1.2 A. The nFAULT output asserts low under over-current and reverse-voltage conditions.

Constant frequency peak current mode control in the DCDC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle over-current protection and operating in hiccup mode limit MOSFET power dissipation. When die temperature exceeds thermal over loading threshold, the over temperature protection shuts down the device.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet TPS65286 Dual Power Distribution Switches With 4.5 V to 28 V Input Voltage datasheet 21 Mär 2014
EVM User's guide TPS65286 DUAL POWER DISTRIBUTION SWITCHES WITH 4.5V TO 28V INPUT VOLTAGE 27 Mär 2014

Design und Entwicklung

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Evaluierungsplatine

TPS65286EVM-623 — TPS65286 Evaluierungsmodul, Dual-Stromverteilungsschalter und 28 Vin/6A-Abwärtswandler

The TPS65286EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the 4.5V to 18V input and 5V, 6A output buck , precision adjustable current limited  distribution switch. The TPS65286 PMIC contains a buck converter and two power switch. The buck converter is (...)

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Simulationsmodell

TPS65286 PSpice Average Model

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