Overview
The NCV5661DT12RKG 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 part of the NCP5661/NCV5661 series, which offers both fixed and adjustable output versions. The NCV5661DT12RKG specifically provides a fixed output voltage of 1.2 V. It features ultra-fast transient response times, low noise operation, and additional functionalities such as Enable and Error Flag, enhancing its utility in various 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 |
| 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 | TSHD | 160 | - | - | °C |
| Ground Current (Iout = 1.0 A, Disabled State) | Iq, Iqds | 1.3, 30 | - | 3.0, 300 | mA, μA |
| Enable Input Threshold Voltage | Ven | 1.3 | - | 0.3 | V |
| Error Flag Output Low Voltage Saturation (Ief = 1.0 mA) | Vefdo | 200 | - | - | mV |
Key Features
- Ultra-Fast Transient Response: Settling time of 1-3 μs, ensuring rapid response to load transients.
- Low Noise Operation: Low noise voltage of 26 μVrms without a bypass capacitor.
- Enable Functionality: Allows for on/off control of the regulator via the Enable pin.
- Error Flag: Provides a logic Low output when the output voltage drops below the nominal value, useful for monitoring and fault detection.
- Thermal Robustness: Available in 5-pin DPAK and DFN 3x3.3 mm packages, ensuring good thermal performance.
- Low Ground Current: Independent of load current, reducing power consumption.
- Internal Current Limitation: Limits peak output current to 1.5 A to prevent excessive power dissipation.
- Ripple Rejection: High ripple rejection of 70 dB at 120 Hz and 65 dB at 1 kHz.
Applications
The NCV5661DT12RKG is suitable for various high-power applications, including:
- Server power supplies
- ASIC power supplies
- Networking equipment
- Other high-current LDO requirements
Q & A
- What is the maximum output current of the NCV5661DT12RKG?
The maximum output current is 1.0 A.
- What are the input voltage range and output voltage accuracy of the NCV5661DT12RKG?
The input voltage range is 2.0 V to 9.0 V, and the output voltage accuracy at 25°C is ±1%.
- Does the NCV5661DT12RKG have an Enable function?
Yes, it has an Enable pin that allows for on/off control of the regulator.
- What is the purpose of the Error Flag in the NCV5661DT12RKG?
The Error Flag produces a logic Low when the output voltage drops below the nominal value, useful for monitoring and fault detection.
- What is the recommended input capacitor for the NCV5661DT12RKG?
A 150 μF OSCON capacitor with an ESR of 50 mΩ is recommended.
- How does the thermal performance of the NCV5661DT12RKG compare?
The device is thermally robust and available in packages such as DPAK and DFN 3x3.3 mm, ensuring good thermal performance.
- What is the ripple rejection of the NCV5661DT12RKG?
The ripple rejection is 70 dB at 120 Hz and 65 dB at 1 kHz.
- What are the typical applications for the NCV5661DT12RKG?
It is suitable for server power supplies, ASIC power supplies, networking equipment, and other high-current LDO requirements.
- How does the NCV5661DT12RKG handle overcurrent conditions?
The device has internal current limitation that clamps the peak output current to 1.5 A to prevent excessive power dissipation.
- What is the thermal shutdown temperature of the NCV5661DT12RKG?
The thermal shutdown temperature is 160°C.
