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4.5V to 28V Input, 6A output synchronous buck converter with dual load switches


Package | PIN: RHD | 28
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $3.47
10-24 $3.12
25-99 $2.92
100-249 $2.61
250-499 $2.44
500-749 $2.12
750-999 $1.84
1000+ $1.80


  • 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

Texas Instruments  TPS65286RHDR

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.