Overview
The NCV5661MNADJT2G is a high-performance, ultra-fast low dropout linear regulator from onsemi, designed for high-power applications requiring up to 1.0 A current. This device is available in both fixed and adjustable output versions, with output voltages as low as 0.9 V. The NCV5661MNADJT2G features an ultra-fast transient response time, low noise without a bypass capacitor, and additional functionalities such as Enable and Error Flag for the fixed output version. It is packaged in a thermally robust 6-pin DFN 3x3.3 mm package, making it suitable for various high-current applications.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage | Vin | 2.0 | - | 9.0 | V |
| Output Voltage Accuracy (TJ = 25°C, Iout = 10 mA to 1.0 A) | Vout | -1% | - | +1% | % |
| Output Noise Voltage (f = 10 Hz to 100 kHz) | Vn | - | 26 | - | μVrms |
| Dropout Voltage (Iout = 1.0 A) | VDO | 1.0 | - | 1.3 | V |
| Peak Output Current Limit | Iout | 1.0 | - | - | A |
| Internal Current Limitation | Ilim | 1.5 | - | - | A |
| Ripple Rejection (120 Hz) | RR | - | 70 | - | dB |
| Thermal Shutdown | TSHD | 160 | - | - | °C |
| Ground Current (Iout = 1.0 A, Disabled State) | Iq, Iqds | 1.3, 10 | - | 3.0, 300 | mA, μA |
| Enable Input Threshold Voltage | Ven | 1.3 | - | 0.3 | V |
Key Features
- Ultra-Fast Transient Response: Settling time of 1-3 μs, ensuring rapid response to load transients.
- Low Noise: 26 μVrms output noise without a bypass capacitor.
- Enable Functionality: Allows for on/off control of the regulator via the Enable pin.
- Error Flag (Fixed Output Version): Provides a logic Low signal when the output voltage drops below the nominal value.
- Thermal Robustness: Available in 5-pin DPAK and 6-pin DFN 3x3.3 mm packages, ensuring good thermal performance.
- Low Ground Current: Independent of load current, reducing power consumption.
- Adjustable Output Version: Allows for output voltage adjustment using a resistor divider network.
Applications
The NCV5661MNADJT2G is suitable for a variety of high-power applications, including:
- Server power supplies
- ASIC power supplies
- Networking equipment
- Other high-current linear regulator needs
Q & A
- What is the maximum output current of the NCV5661MNADJT2G?
The maximum output current is 1.0 A.
- What are the available output voltage options for the NCV5661MNADJT2G?
The device is available in both fixed output versions (e.g., 1.2 V, 1.5 V, 1.8 V, etc.) and an adjustable output version.
- What is the dropout voltage of the NCV5661MNADJT2G at 1.0 A output current?
The dropout voltage is between 1.0 V and 1.3 V.
- How does the Enable function work on the NCV5661MNADJT2G?
The Enable pin allows for on/off control of the regulator. Connecting it to Ground disables the device, while connecting it to Vin enables it.
- What is the purpose of the Error Flag pin in the fixed output version?
The Error Flag pin produces a logic Low signal when the output voltage drops below the nominal value.
- What is the recommended input capacitor for the NCV5661MNADJT2G?
A 150 μF OSCON capacitor with an ESR of 50 mΩ is recommended.
- What are the thermal shutdown and ground current characteristics of the NCV5661MNADJT2G?
The thermal shutdown is guaranteed at 160°C, and the ground current is 1.3 mA (typical) when the device is enabled and 10 μA (typical) when disabled.
- How does the adjustable output version of the NCV5661MNADJT2G work?
The adjustable output version uses a resistor divider network (R1 and R2) to set the output voltage, with a reference voltage of 0.9 V.
- What are the package options for the NCV5661MNADJT2G?
The device is available in both 5-pin DPAK and 6-pin DFN 3x3.3 mm packages.
- What are some common applications for the NCV5661MNADJT2G?
Common applications include server power supplies, ASIC power supplies, and networking equipment.
