3A 18V PFM/PWM Step-Down Regulator

  • 3A Continuous Output Current
  • 4.5V to 18V Wide Input Voltage
    • 0.925V to 16V Adjustable Output Voltage
    • 2% Accuracy
  • PWM Current Mode Control
    • 340kHz Constant Operations
    • Up to 95% Efficiency
  • Light Load Efficiency
  • Programmable Soft-Start and Enable Function
  • Built-in Thermal, Over Current, UVLO and Output Over Voltage Protections
  • Pin/Function Upgrade to Exar XRP7665 and MPS MP1484/2307
  • RoHS Compliant, "Green"/Halogen Free 8-Pin SOIC Package

  • Distributed Power Architecture
  • Energy Star Compliant Equipment
  • Portable Equipment
  • Point of Load Converter
  • Audio-Video Equipment

The XRP7675 is a 3A capable synchronous current-mode PWM step down (buck) voltage regulator with improved light current load efficiency. A wide 4.5V to 18V input voltage range allows for single supply operations from industry standard 5V and 12V power rails.

With a 340kHz constant operating frequency and integrated high and low-side 100mΩ/100mΩ MOSFETs, the XRP7675 reduces the overall component count and solution footprint. Current-mode control provides fast transient response and cycle-by-cycle OCP. An adjustable soft-start prevents inrush current at turn-on, and in shutdown mode the supply current drops to 0.1µA. At light current loads, the XRP7675 operates in Discontinuous Conduction Mode (DCM) and is complemented by a pulse frequency modulation mode (PFM) to provide excellent conversion efficiency.

Built-in output over-voltage (open load), over temperature, cycle-by-cycle over-current, under-voltage lockout (UVLO) and hiccup mode short-circuit protection insures safe operation under abnormal operating conditions.

The XRP7675 is offered in a RoHS compliant, "green"/halogen free 8-pin Exposed Pad SOIC package.

Part NumberPkg CodeRoHSMin
StatusBuy NowOrder Samples
XRP7675EVBBoard   Active

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs. 
Vin MAX.(V)18
IQ (µA)1200
VOUT MIN. (V)0.925
Freq (kHz)340