Overview
The NCP1587EDR2G is a low-voltage synchronous buck controller designed by ON Semiconductor. This device is intended for DC-DC conversion applications, particularly from 5.0 V and 12 V buses. It features a 1 A internal gate driver circuit, which is capable of driving N-channel MOSFETs in a synchronous-rectifier buck topology. The controller includes various efficiency-enhancing features such as adaptive non-overlap circuitry, an externally compensated error amplifier, and a capacitor-programmable soft-start function. It also incorporates protection features like programmable short-circuit protection and under-voltage lockout (UVLO).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 - 13.2 | V |
| Boost Voltage Range | 4.5 - 26.5 | V |
| Internal Oscillator Frequency | 275 | kHz |
| Internal Reference Voltage | 0.8 ± 1.0% | V |
| Maximum Duty Cycle | 80% | % |
| UVLO Threshold | 3.8 - 4.2 | V |
| UVLO Hysteresis | 350 | mV |
| Operating Junction Temperature Range | -40 to 125 | °C |
| Operating Ambient Temperature Range | -40 to 125 | °C |
| Package Type | SOIC-8 (Pb-Free) |
Key Features
- Adaptive non-overlap circuitry to minimize power dissipation and increase efficiency.
- Externally compensated error amplifier and capacitor-programmable soft-start function.
- Programmable short-circuit protection and under-voltage lockout (UVLO).
- Internal 1 A gate drivers for high-power and low-power conversion requirements.
- Voltage mode PWM control with adjustable output voltage.
- Boost pin operates up to 30 V.
- High gain operational transconductance error amplifier (OTA).
Applications
- Graphics Cards
- Desktop Computers
- Servers and Networking Equipment
- DSP & FPGA Power Supply
- DC-DC Regulator Modules
Q & A
- What is the input voltage range of the NCP1587EDR2G?
The input voltage range is from 4.5 V to 13.2 V.
- What is the internal oscillator frequency of the NCP1587EDR2G?
The internal oscillator frequency is 275 kHz.
- What is the maximum duty cycle of the NCP1587EDR2G?
The maximum duty cycle is 80%.
- How does the UVLO feature work in the NCP1587EDR2G?
The UVLO ensures the device operates only when VCC is above a certain threshold (3.8 - 4.2 V), preventing unexpected behavior at low voltages.
- What type of gate drivers does the NCP1587EDR2G include?
The device includes internal 1 A gate drivers for driving N-channel MOSFETs.
- How can the output voltage of the NCP1587EDR2G be adjusted?
The output voltage can be adjusted using an external resistor divider network connected to the feedback pin.
- What is the purpose of the adaptive non-overlap circuitry in the NCP1587EDR2G?
The adaptive non-overlap circuitry minimizes power dissipation by reducing body diode conduction time.
- What protection features are included in the NCP1587EDR2G?
The device includes programmable short-circuit protection and under-voltage lockout (UVLO).
- What is the recommended package type for the NCP1587EDR2G?
The recommended package type is SOIC-8 (Pb-Free).
- What are some common applications for the NCP1587EDR2G?
Common applications include graphics cards, desktop computers, servers, DSP & FPGA power supply, and DC-DC regulator modules.
