Overview
The NCV5661DTADJRKG 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 part of the NCP5661/NCV5661 series, which offers both fixed and adjustable output versions. The NCV5661DTADJRKG specifically is an adjustable output version, packaged in a DPAK-5 package and is lead-free.
It features ultra-fast transient response times, low noise operation without the need for a bypass capacitor, and additional functionalities such as Enable and Error Flag. These features make it an attractive solution for various high-current applications.
Key Specifications
| Characteristic | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Input Voltage | Vin | 2.0 | - | 9.0 | V |
| Output Noise Voltage (f = 10 Hz to 100 kHz) | Vn | - | 26 | - | μVrms |
| Output Voltage Accuracy (TJ = 25°C, Iout = 10 mA to 1.0 A) | Vout | -1% | - | +1% | % |
| Line Regulation (Iout = 10 mA, Vout+1.5 V < Vin < 7.0 V) | REGline | - | 0.03 | - | % |
| Load Regulation (10 mA < Iout < 1.0 A) | REGload | - | 0.03 | - | % |
| 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 (Guaranteed by Design) | 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 quick response to load transients.
- Low Noise Operation: Low noise without the need for a bypass capacitor, with an output noise voltage of 26 μVrms.
- Enable and Error Flag: On/off control via the Enable pin and an Error Flag pin that indicates when the output voltage drops below the nominal value.
- Thermally Robust: Available in 5-pin DPAK and DFN 3x3.3 mm packages, with low ground current independent of load.
- Adjustable Output: The adjustable version allows for output voltage adjustment using a resistor divider network.
- High Current Capability: Supports up to 1.0 A output current with internal current limitation to prevent overcurrent conditions.
- Thermal Shutdown: Guaranteed by design to protect against overheating, with a thermal shutdown temperature of 160°C.
Applications
The NCV5661DTADJRKG is suitable for a variety of high-power applications, including:
- Server power supplies
- ASIC power supplies
- Networking equipment
- Other high-current LDO requirements
Its ultra-fast transient response, low noise, and thermal robustness make it an ideal choice for demanding power supply needs.
Q & A
- What is the maximum output current of the NCV5661DTADJRKG?
The maximum output current is 1.0 A.
- What are the available output voltage options for the NCV5661 series?
The NCV5661 series offers both fixed and adjustable output versions, with fixed output voltages ranging from 0.9 V to 3.3 V.
- What is the dropout voltage of the NCV5661DTADJRKG at 1.0 A output current?
The dropout voltage is between 1.0 V and 1.3 V.
- Does the NCV5661DTADJRKG have thermal shutdown protection?
- How do I adjust the output voltage in the adjustable version of the NCV5661?
The output voltage can be adjusted using a resistor divider network connected to the ADJ pin, with the reference voltage being 0.9 V.
- What is the purpose of the Error Flag pin in the fixed output version?
The Error Flag pin indicates when the output voltage drops below the nominal value, producing a logic Low signal.
- What type of capacitors are recommended for input and output stability?
For input, a 150 μF OSCON capacitor with low ESR is recommended. For output, low ESR electrolytic or multilayer ceramic capacitors should be used.
- What is the significance of the Enable pin?
The Enable pin allows for on/off control of the regulator, enabling the device when connected to Vin and disabling it when connected to Ground.
- What are the package options available for the NCV5661 series?
The NCV5661 series is available in both DPAK-5 and DFN 3x3.3 mm packages.
- Is the NCV5661DTADJRKG lead-free?
