HPL5331

HPL5331 3A Bus Termination Regulator Features Provide Bi-direction Current - Sourcing or Sinking Current up to 3A 1.25V/0.9V Output for DDR I/II Applications Fast Transient Response High Output Accuracy - ±20mV over Load, VOUT Offset and Temperature Adjustable Output Voltage by External Resistors Current-Limit Protection On-Chip Thermal Shutdown Shutdown for Standby or Suspend Mode Simple SOP-8, SOP-8-P with thermal pad, TO-252- 5 and TO-263-5 Packages General Description (Cont.) On-chip thermal shutdown provides protection against any combination of overload that would create excessive junction temperature. The output voltage of HPL5331 track the voltage at VREF pin. A resistor divider connected to VIN, GND and VREF pins is used to provide a half voltage of VIN to VREF pin. In addition, an external ceramic capacitor and an opendrain transistor connected to VREF pin provides softstart and shutdown control respectively. Pulling and holding the VREF to GND shuts off the output. The output of HPL5331 will be high impedance after being shut down by VREF or thermal shutdown function. Pin Configuration VIN GND Applications DDR I/II SDRAM Termination SSTL-2/3 Termination Voltage Applications Requiring the Regulator with Bi-direction 3A Current Capability 1 2 3 4 8 7 6 5 VCNTL VCNTL VCNTL VCNTL VOUT VREF VCNTL GND VIN VREF VOUT TAB is VCNTL SOP-8 (Top View) VIN TO-252-5 (Top View) 5 4 3 2 1 VOUT VREF VCNTL GND VIN 1 2 3 4 8 7 6 5 NC NC General ...