onsemi NCP51400MNTXG

The NCP51400 is a source/sink Double Data Rate (DDR) termination regulator specifically designed for low input voltage and low−noise systems where space is a key consideration. The NCP51400 maintains a fast transient response and only requires a minimum output capacitance of 20 μF. The NCP51400 supports a remote sensing function and all power requirements for DDR VTT bus termination. The NCP51400 can also be used in low−power chipsets and graphics processor cores that require dynamically adjustable output voltages. The NCP51400 is available in the thermally−efficient DFN10 Exposed Pad package, and is rated both Green and Pb−free.

The NCP51400 is a sink/source tracking termination regulator specifically designed for low input voltage and low external component count systems where space is a key application parameter. The NCP51400 integrates a high−performance, low−dropout (LDO) linear regulator that is capable of both sourcing and sinking current. The LDO regulator employs a fast feedback loop so that small ceramic capacitors can be used to support the fast load transient response. To achieve tight regulation with minimum effect of trace resistance, a remote sensing terminal, VTTS, should be connected to the positive terminal of the output capacitors as a separate trace from the high current path from VTT. The output voltage, VTT, is regulated to VRO. When VRI is configured for standard DDR termination applications, VRI can be set by an external equivalent ratio voltage divider connected to the memory supply bus (VDDQ). The NCP51400 supports VRI voltage from 0.5 V to 1.8 V, making it versatile and ideal for many types of low−power LDO applications. When it is configured for DDR termination applications, ΔVRO generates the DDR VTT reference voltage for the memory application. It is capable of supporting both a sourcing and sinking load of 10 mA. ΔVRO becomes active when V

• For Automotive Applications
• Input Voltage Rails: Supports 2.5 V, 3.3 V and 5 V Rails
• PVC Voltage Range: 1.1 V to 3.5 V
• Integrated Power MOSFETs
• Fast Load−Transient Response
• PGOOD - Logic output pin to Monitor VTT Regulation
• EN - Logic input pin for Shutdown mode
• VRI - Reference Input Allows for Flexible Input Tracking Either Directly or Through Resistor Divider
• Remote Sensing (VTTS)
• Built−in Soft Start, Under Voltage Lockout and Over Current Limit
• Thermal Shutdown
• Small, Low−Profile 10−pin, 3x3 DFN Package
• NCV51400MWTXG - Wettable Flank Option for Enhanced Optical Inspection
• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
• These Devices are Pb−Free and are RoHS Compliant

• DDR Memory Termination
• Desktop PC’s, Notebooks, and Workstations
• Servers and Networking equipment
• Telecom/Datacom, GSM Base Station
• Graphics Processor Core Supplies
• Set Top Boxes, LCD−TV/PDP−TV, Copier/Printers
• Chipset/RAM Supplies as Low as 0.5 V
• Active Bus Termination