Overview
The NCP1587ADR2G, produced by onsemi, is a low-cost PWM (Pulse Width Modulation) controller designed for DC-DC conversion applications. This device operates from a 5 V or 12 V supply and can produce output voltages as low as 0.8 V. It is optimized for use in synchronous buck converter topologies, providing a high level of integration to reduce the size and cost of the power supply. The NCP1587ADR2G features a 1 A gate driver design and an internally set oscillator frequency of 275 kHz, making it suitable for a variety of high-power and low-power conversion requirements.
Key Specifications
| Characteristic | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 13.2 | V |
| Boost Voltage Range | 4.5 | - | 26.5 | V |
| Internal Oscillator Frequency | 250 | 275 | 300 | kHz |
| Output Voltage Range | 0.8 | - | 5.0 | V |
| Maximum Duty Cycle | 70 | - | 80 | % |
| Gate Driver Current | - | - | 1 A | - |
| Thermal Resistance, Junction-to-Ambient | - | - | 165 | °C/W |
| Operating Junction Temperature Range | 0 | - | 125 | °C |
| Storage Temperature Range | -55 | - | 150 | °C |
Key Features
- Input Voltage Range from 4.5 to 13.2 V
- Internally set 275 kHz oscillator frequency
- Boost Pin operates up to 30 V
- Voltage Mode PWM Control
- 0.8 V ±1.0% internal reference voltage
- Adjustable output voltage
- Capacitor programmable soft-start function
- Internal 1 A gate drivers with adaptive non-overlap circuitry
- 80% maximum duty cycle
- Input under voltage lockout (UVLO)
- Programmable current limit
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
- Graphics Cards
- Desktop Computers
- Servers / Networking
- DSP & FPGA Power Supply
- DC-DC Regulator Modules
Q & A
- What is the input voltage range of the NCP1587ADR2G?
The input voltage range is from 4.5 V to 13.2 V.
- What is the internal oscillator frequency of the NCP1587ADR2G?
The internal oscillator frequency is 275 kHz.
- What is the maximum output voltage that can be regulated by the NCP1587ADR2G?
The output voltage can be regulated up to 5.0 V.
- Does the NCP1587ADR2G have built-in protection features?
Yes, it includes input under voltage lockout (UVLO) and programmable short circuit protection.
- What type of gate drivers does the NCP1587ADR2G have?
The device has internal 1 A gate drivers with adaptive non-overlap circuitry.
- Is the NCP1587ADR2G RoHS compliant?
Yes, it is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What is the typical application of the NCP1587ADR2G?
It is commonly used in synchronous buck converter topologies for DC-DC conversion.
- How is the output voltage adjusted in the NCP1587ADR2G?
The output voltage can be adjusted using an external resistor divider network connected to the feedback pin.
- What is the purpose of the soft-start function in the NCP1587ADR2G?
The soft-start function, which is capacitor programmable, helps in reducing inrush current during startup.
- What are the thermal specifications of the NCP1587ADR2G?
The operating junction temperature range is from 0°C to 125°C, and the thermal resistance, junction-to-ambient, is 165°C/W.
