The TPS51200A-Q1 device 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.
The device maintains a fast transient response and only requires a minimum output capacitance of 20 μF. The device supports a remote sensing function and all power requirements for DDR, DDR2, DDR3, and Low Power DDR3 and DDR4 VTT bus termination.
In addition, the device 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.
The device is available in the thermally-efficient VSON-10 package, and is rated both green and Pb-free. The device is specified from –40°C to 125°C.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS51200A-Q1 | VSON (10) | 3.00 mm × 3.00 mm |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
EN | 7 | I | For DDR VTT application, connect EN to SLP_S3. For any other applications, use EN as the ON/OFF function. Keep EN voltage equal or lower than VIN voltage at all times. |
GND | 8 | — | Ground. Signal ground. Connect to negative pin of the output capacitor. |
PGND(1) | 4 | — | Power ground output for the LDO |
PGOOD | 9 | O | PGOOD output. Indicates regulation. |
REFIN | 1 | I | Reference input |
REFOUT | 6 | O | Reference output. Connect to GND through 0.1-μF ceramic capacitor. If there is REFOUT capacitor at DDR side, keep the total capacitance on REFOUT pin below 1 μF. The REFOUT pin can not be open. |
VIN | 10 | I | 2.5-V or 3.3-V power supply A ceramic decoupling capacitor with a value between 1-μF and 4.7-μF is required. |
VLDOIN | 2 | I | Supply voltage for the LDO. |
VO | 3 | O | Power output for the LDO. Minimum 20-μF capacitance is required. No maximum capacitance limit. |
VOSNS | 5 | I | Voltage sense output for the LDO. Connect to positive pin of the output capacitor or the load. |