Overview
The NCP51400MNTXG is a source/sink Double Data Rate (DDR) termination regulator designed by onsemi. It is specifically tailored for low input voltage and low-noise systems where space is a critical factor. This regulator supports DDR VTT bus termination and is suitable for applications requiring fast transient response and minimal external component count. The NCP51400MNTXG is also versatile in supporting low-power chipsets and graphics processor cores that need dynamically adjustable output voltages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Rails | 2.5 V, 3.3 V, 5 V | V |
| PVCC Voltage Range | 1.1 V to 3.5 V | V |
| Output Voltage Range (VTT) | 0.5 V to 3.5 V | V |
| Output Current Capability | Up to 3 A | A |
| Minimum Output Capacitance | 20 μF | μF |
| Operating Temperature Range | -40°C to +125°C | °C |
| Thermal Shutdown Temperature | 150°C | °C |
| Package Type | 10-pin DFN (3x3 mm) | - |
| Thermal Resistance (Junction to Ambient) | 53.9 °C/W | °C/W |
Key Features
- Integrated Power MOSFETs for sourcing and sinking current.
- Fast load-transient response with minimal output capacitance requirement.
- Remote sensing (VTTS) for accurate feedback sensing.
- PGOOD logic output pin to monitor VTT regulation.
- EN logic input pin for shutdown control.
- VRI reference input for flexible input tracking.
- Built-in soft start, under-voltage lockout, and over-current limit.
- Thermal shutdown protection with hysteresis.
- Small, low-profile 10-pin DFN package with exposed pad for thermal efficiency.
- AEC-Q100 qualified and PPAP capable for automotive applications.
- Pb-free and RoHS compliant.
Applications
- DDR Memory Termination (DDR1, DDR2, DDR3, LPDDR3, DDR4).
- Desktop PCs, 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.
Q & A
- What is the primary function of the NCP51400MNTXG?
The NCP51400MNTXG is a source/sink Double Data Rate (DDR) termination regulator designed for low input voltage and low-noise systems.
- What are the supported input voltage rails for the NCP51400MNTXG?
The NCP51400MNTXG supports input voltage rails of 2.5 V, 3.3 V, and 5 V.
- What is the minimum output capacitance required for the NCP51400MNTXG?
The minimum output capacitance required is 20 μF.
- Does the NCP51400MNTXG have thermal shutdown protection?
- What package type is the NCP51400MNTXG available in?
The NCP51400MNTXG is available in a 10-pin DFN (3x3 mm) package with an exposed pad.
- Is the NCP51400MNTXG suitable for automotive applications?
- What is the purpose of the PGOOD output pin?
The PGOOD output pin is an open-drain output that indicates when the VTT output is within ±20% of the VRO reference voltage.
- How does the remote sensing function work in the NCP51400MNTXG?
The remote sensing function uses the VTTS pin to provide accurate feedback sensing of VTT by connecting it to the remote DDR termination bypass capacitors.
- What is the soft-start function in the NCP51400MNTXG?
The soft-start function is achieved via a current clamp, allowing the output capacitors to be charged with a low and constant current, providing a linear ramp-up of the output voltage.
- Is the NCP51400MNTXG Pb-free and RoHS compliant?
