Overview
The NCP5661MN33T2G is a high-performance, low dropout linear regulator from onsemi, designed for high power applications requiring up to 1.0 A of current. This device is available in a fixed output version with a voltage of 3.3 V. It features ultra-fast transient response times, low noise operation, and a robust thermal design, making it suitable for a variety of applications including servers, ASIC power supplies, and networking equipment.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (Vin) | 2.0 | 9.0 | V | |
| Output Voltage (Vout) | 3.3 | 3.3 | V | |
| Output Noise Voltage (Vn) | 26 | μVrms | ||
| Output Voltage Accuracy (TJ = 25°C) | -1% | +1% | % | |
| Line Regulation (Iout = 10 mA) | 0.03 | % | ||
| Load Regulation (10 mA < Iout < 1.0 A) | 0.2 | % | ||
| Dropout Voltage (Iout = 1.0 A) | 1.0 | 1.3 | V | |
| Peak Output Current Limit (Iout) | 1.0 | A | ||
| Internal Current Limitation (Ilim) | 1.5 | A | ||
| Ripple Rejection (120 Hz) | 70 | dB | ||
| Thermal Shutdown (TSHD) | 160 | °C | ||
| Ground Current (Iq) at Iout = 1.0 A | 1.3 | 3.0 | mA | |
| Enable Input Threshold Voltage | 0.3 | 1.3 | V |
Key Features
- Ultra-fast transient response time (settling time: 1-3 μs)
- Low noise operation without bypass capacitor (26 μVrms)
- Low ground current independent of load (maximum 3.0 mA)
- Fixed and adjustable output voltage versions available
- Enable function for on/off control
- Error Flag for fixed output version
- Current limit protection and thermal protection
- 0.9 V reference voltage for ultra-low output operation
- Power Supply Rejection Ratio > 65 dB
- AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements
Applications
- Servers
- ASIC power supplies
- Post regulation for power supplies
- Constant current source
- Networking equipment
- Gaming and STB modules
Q & A
- What is the maximum output current of the NCP5661MN33T2G?
The maximum output current is 1.0 A. - What are the available output voltage options for the NCP5661 series?
The NCP5661 series offers both fixed and adjustable output voltage versions, with fixed voltages ranging from 0.9 V to 3.3 V. - What is the typical dropout voltage for the NCP5661MN33T2G at 1.0 A output current?
The typical dropout voltage is 1.3 V. - Does the NCP5661MN33T2G have thermal protection?
Yes, it has thermal shutdown protection guaranteed by design at 160°C. - What is the recommended input capacitor for the NCP5661MN33T2G?
The recommended input capacitor is a 150 μF OSCON with an Equivalent Series Resistance (ESR) of 50 mΩ. - How does the Error Flag function work on the fixed output version?
The Error Flag pin produces a logic Low when the output voltage drops below the nominal output voltage and remains at logic High when the output voltage is above the nominal value. - What is the power supply rejection ratio (PSRR) of the NCP5661MN33T2G?
The PSRR is greater than 65 dB. - Is the NCP5661MN33T2G suitable for automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other applications requiring unique site and control change requirements. - What is the typical ground current of the NCP5661MN33T2G at 1.0 A output current?
The typical ground current is 1.3 mA. - How does the Enable function work on the NCP5661MN33T2G?
The Enable pin allows for on/off control of the regulator. To disable the device, connect the Enable pin to Ground; to enable, connect it to Vin.
