Overview
The NCP51403MNTXG is a source/sink Double Data Rate (DDR) termination regulator designed by ON Semiconductor. It is specifically tailored for low input voltage and low-noise systems where space is a critical factor. This regulator maintains a fast transient response and requires only a minimum output capacitance of 20 μF. It supports remote sensing and fulfills all power requirements for DDR VTT bus termination. Additionally, the NCP51403MNTXG can be used in low-power chipsets and graphics processor cores that need dynamically adjustable output voltages.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Rails | - | - | - | 2.5 V, 3.3 V, 5 V |
| PVCC Voltage Range | 1.1 | - | 3.5 | V |
| VCC Supply Voltage | 2.375 | - | 5.5 | V |
| Output Voltage Range (VTT) | -0.1 | - | 3.5 | V |
| Output Current | - | - | 3 | A |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Storage Temperature | -55 | - | 150 | °C |
| Thermal Shutdown Temperature | - | - | 150 | °C |
| ESD Capability (Human Body Model) | - | - | 2000 | V |
| Package Type | - | - | - | 10-pin DFN (3x3 mm) |
Key Features
- Integrated Power MOSFETs for efficient current handling.
- Remote sensing function (VTTS) for accurate feedback sensing.
- Phase margin >45° with recommended 20 μF VTT capacitance.
- PGOOD logic output pin to monitor VTT regulation.
- EN logic input pin for shutdown mode.
- VRI reference input allows for flexible input tracking.
- Built-in under-voltage lockout and over-current limit.
- Thermal shutdown with hysteresis.
- Small, low-profile 10-pin DFN package.
- 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 Stations.
- Graphics Processor Core Supplies.
- Set Top Boxes, LCD-TV/PDP-TV, Copier/Printers.
- Chipset/RAM Supplies as low as 0.5 V.
Q & A
- What is the primary function of the NCP51403MNTXG?
The NCP51403MNTXG is a source/sink Double Data Rate (DDR) termination regulator designed for low input voltage and low-noise systems.
- What is the minimum output capacitance required for the NCP51403MNTXG?
The minimum output capacitance required is 20 μF.
- What are the supported input voltage rails for the NCP51403MNTXG?
The supported input voltage rails are 2.5 V, 3.3 V, and 5 V.
- What is the maximum output current of the NCP51403MNTXG?
The maximum output current is 3 A.
- What is the operating junction temperature range for the NCP51403MNTXG?
The operating junction temperature range is -40°C to 125°C.
- Does the NCP51403MNTXG have thermal shutdown protection?
Yes, it has thermal shutdown protection that activates at 150°C and resumes operation at 125°C.
- What package type is the NCP51403MNTXG available in?
The NCP51403MNTXG is available in a 10-pin DFN (3x3 mm) package.
- Is the NCP51403MNTXG Pb-free and RoHS compliant?
Yes, it is Pb-free and RoHS compliant.
- What is the purpose of the PGOOD output pin?
The PGOOD output pin monitors VTT regulation and goes high when the VTT output is within ±20% of VRO.
- What is the function of the EN input pin?
The EN input pin controls the shutdown mode; when driven high, the regulator begins normal operation, and when driven low, it shuts down.
