Overview
The NXP® MC34716EP is a highly integrated, space-efficient, and low-cost dual synchronous buck switching regulator. It features integrated N-channel power MOSFETs and is designed to provide a high-performance point-of-load (PoL) power supply solution, particularly for Double-Data-Rate (DDR) memories. This device is housed in a Pb-free, thermally enhanced 26-pin exposed pad QFN package and operates within a temperature range of -40 °C to 85 °C.
Key Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Range | 3.0 V to 6.0 V |
| Output Voltage Range | 0.6 V to 3.6 V (±1% accuracy) |
| Output Current Capability | Channel 1: 5.0 A source only, Channel 2: 3.0 A sink/source |
| Switching Frequency | Programmable from 200 kHz to 1.0 MHz |
| Integrated MOSFETs | 50 mΩ N-channel power MOSFETs |
| Package Type | 26-pin QFN |
| Temperature Range | -40 °C to 85 °C |
| Buffered Reference Output Voltage | ±1% accurate VREFOUT |
Key Features
- Highly efficient voltage mode synchronous buck switching converter topology
- Tight output voltage regulation (±1% accuracy)
- Programmable switching frequency and soft start timing
- Over-current limit, short-circuit protection, thermal shutdown, and output over-voltage/under-voltage detection
- Active low power good output signal and standby/shutdown inputs
- Buffered output reference voltage (VREFOUT) for enhanced noise immunity and load stability
- Ability to track an external reference voltage for the second output, ideal for DDR memory termination voltage (VTT)
Applications
The MC34716EP is primarily designed to provide a complete power supply solution for Double-Data-Rate (DDR) memories, including DDR, DDR2, DDR3, and Low Power DDR3/DDR4. It is suitable for applications requiring high current drive capability and tight voltage regulation, such as memory chipsets and modern data buses.
Q & A
- What is the input voltage range of the MC34716EP?
The input voltage range is from 3.0 V to 6.0 V. - What are the output current capabilities of the MC34716EP?
Channel 1 can source up to 5.0 A, while Channel 2 can sink and source up to 3.0 A. - What is the switching frequency range of the MC34716EP?
The switching frequency is programmable from 200 kHz to 1.0 MHz. - What type of MOSFETs are integrated in the MC34716EP?
The device features 50 mΩ N-channel power MOSFETs. - What is the temperature range of the MC34716EP?
The device operates within a temperature range of -40 °C to 85 °C. - Does the MC34716EP have built-in protection features?
Yes, it includes over-current limit, short-circuit protection, thermal shutdown, and output over-voltage/under-voltage detection. - How does the MC34716EP support DDR memory termination voltage (VTT)?
The second output can track an external reference voltage, which is ideal for supporting the termination voltage (VTT) required by DDR memory buses. - What package type is the MC34716EP available in?
The device is housed in a 26-pin QFN package. - Does the MC34716EP provide a buffered reference output voltage?
Yes, it provides a ±1% accurate buffered reference output voltage (VREFOUT). - What are the standby and shutdown inputs used for in the MC34716EP?
The STBY and SD pins support suspend-to-RAM (S3) and suspend-to-disk (S5) states by pulling these pins low.
