Texas Instruments TPS51200DRC Sink/Source DDR Termination Regulator

The Texas Instruments TPS51200DRC is a sink and source double data rate (DDR) termination regulator specifically designed for low input voltage, low-cost, low-noise systems where space is a key consideration. It is ideal for use in a wide range of applications, including laptops, tablets, smartphones, and other mobile devices, as well as networking and server equipment.

The TPS51200DRC maintains a fast transient response and requires a minimum output capacitance of only 20 μF. It supports a remote sensing function and all power requirements for DDR, DDR2, DDR3, DDR3L, Low-Power DDR3, and DDR4 VTT bus termination.

In addition, the TPS51200DRC provides an open-drain PGOOD signal to monitor the output regulation and an EN signal that can be used to discharge VTT during S3 (suspend to RAM) for DDR applications. It is available in the thermally efficient 10-pin VSON thermal pad package, and is rated both Green and Pb-free. It is specified from -40°C to +85°C.

Features and Benefits

• Low input voltage operation: 2.38 V to 3.5 V
• Wide output voltage range: 0.6 V to 1.2 V
• Fast transient response
• Low output capacitance requirement: 20 μF
• Remote sensing support
• Supports all power requirements for DDR, DDR2, DDR3, DDR3L, Low-Power DDR3, and DDR4 VTT bus termination
• Open-drain PGOOD signal for output regulation monitoring
• EN signal for VTT discharge during S3 (suspend to RAM)
• Thermally efficient 10-pin VSON thermal pad package
• Green and Pb-free
• Specified from -40°C to +85°C

Applications

• Laptops
• Tablets
• Smartphones
• Other mobile devices
• Networking equipment
• Server equipment

How the TPS51200DRC Works

The TPS51200DRC is a buck-boost regulator, which means that it can convert both higher and lower input voltages to a desired output voltage. It uses a pulse-width modulation (PWM) control scheme to regulate the output voltage.

In sink mode, the TPS51200DRC sinks current from the VTT bus to maintain the desired output voltage. In source mode, it sources current to the VTT bus to maintain the desired output voltage.

The TPS51200DRC also includes a remote sensing function, which allows it to accurately regulate the output voltage at the load, regardless of voltage drop in the traces between the regulator and the load.

Benefits of Using the TPS51200DRC

The TPS51200DRC offers a number of benefits over other DDR termination regulators, including:

• Low input voltage operation: The TPS51200DRC can operate on input voltages as low as 2.38 V, making it ideal for use in battery-powered applications.
• Wide output voltage range: The TPS51200DRC can generate output voltages from 0.6 V to 1.2 V, making it suitable for a wide range of DDR memory types.
• Fast transient response: The TPS51200DRC has a fast transient response, which means that it can quickly respond to changes in the load current and maintain the desired output voltage.
• Low output capacitance requirement: The TPS51200DRC requires a minimum output capacitance of only 20 μF, which reduces the size and cost of the overall solution.
• Remote sensing support: The TPS51200DRC's remote sensing function allows it to accurately regulate the output voltage at the load, regardless of voltage drop in the traces between the regulator and the load.
• Support for all power requirements for DDR, DDR2, DDR3, DDR3L, Low-Power DDR3, and DDR4 VTT bus termination: The TPS51200DRC can be used to terminate all power requirements for DDR memory, including DDR, DDR2, DDR3, DDR3L, Low-Power DDR3, and DDR4 VTT bus termination.
• Open-drain PGOOD signal for output regulation monitoring: The TPS51200DRC's open-drain PGOOD signal can be used to monitor the output regulation and ensure that the DDR memory is properly powered.
• EN signal for VTT discharge during S3 (suspend to RAM): The TPS51200DRC's EN signal can be used to discharge the VTT bus during S3 (suspend to RAM) to extend battery life.
• Thermally efficient 10-pin VSON thermal pad package: