TD5860A _{Source and Sink 2A Fast Transient Response Line Regulator}

(DATASHEET)

The TD5860A linear regulator is designed to provide a regulated voltage with bi-direction output current for DDRSDRAM termination voltage. The TD5860A integrates two power transistors to source or sink load current up to 2A. It also features internal soft-start, current-limit, thermal shutdown and enable control functions into a single chip.The internal soft-start controls the rising rate of the output voltage to prevent inrush current during start-up. The current-limit circuit detects the output current and limits the current during short-circuit or current overload conditions. The on-chip thermal shutdown provides thermal protection against any combination of overload that would create excessive junction temperatures.The output voltage of TD5860A is regulated to track the voltage on VREF pin. An proper resistor divider connected to VIN, GND, and VREF pins is used to provide a half voltage of VIN to VREF pin. In addition, connect an external ceramic capacitor and a open-drain transistor to VREF pin for external soft-start and shutdown control. Pulling and holding the voltage on VREF below the enable voltage threshold shuts down the output. The output of TD5860A will be high impedance after being shut down by VREF or the thermal shutdown function.

Features

* Provide Bi-direction Output Currents

* Sourcing and Sinking Current up to 2A Built-in Soft-Start

* Power-On-Reset Monitoring on VCNTL and VIN pins

* Fast Transient Response

* Stable with Ceramic Output Capacitors ±20mV High System Output Accuracy over Load and Temperature Ranges

* Adjustable Output Voltage by External Resistors

* Current-Limit Protection

* On-Chip Thermal Shutdown

* Shutdown for Standby or Suspend Mode

* SimpleSOP-8 with Exposed Pad(SOP8-PP) Packages

* Lead Free and Green Devices Available(RoHS Compliant)

Applications

* DDRII/III SDRAM Termination Voltage

* Motherboard and VGA Card Power Supplies

* Setop Box

* SSTL-2/3 Termination Voltage

Typical Application Circuit