Overview
The NCV5661DT18RKG is a high-performance, low dropout linear regulator produced by onsemi. This device is part of the NCP5661/NCV5661 series, designed for high power applications requiring up to 1.0 A of current. It is available in both fixed and adjustable output versions, with the NCV5661DT18RKG specifically offering a fixed output voltage of 1.8 V. The regulator features ultra-fast transient response times, low noise operation, and a robust thermal design, making it suitable for a variety of 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) | Iq | 1.3 | 3.0 | mA | |
| 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: 26 μVrms output noise without a bypass capacitor.
- Low Ground Current: Independent of load, with a maximum of 3.0 mA.
- Fixed and Adjustable Output Versions: Output voltages as low as 0.9 V, with fixed versions including 1.8 V for the NCV5661DT18RKG.
- Enable Function: Allows for on/off control of the regulator.
- Error Flag (Fixed Output Version): Provides a logic low signal when the output voltage drops below the nominal value.
- Current Limit Protection and Thermal Protection: Internal current limitation and thermal shutdown to prevent device overheating.
- AEC-Q100 Qualified and PPAP Capable: Suitable for automotive and other applications requiring unique site and control change requirements.
Applications
- Servers: Ideal for power supply regulation in server systems.
- ASIC Power Supplies: Used for post-regulation in power supplies for Application-Specific Integrated Circuits (ASICs).
- Networking Equipment: Suitable for power regulation in networking devices.
- Gaming and STB Modules: Used in gaming consoles and Set-Top Box (STB) modules.
- Constant Current Source: Can be used as a constant current source in various applications.
Q & A
- What is the maximum output current of the NCV5661DT18RKG?
The maximum output current is 1.0 A.
- What are the input voltage range and output voltage accuracy of the NCV5661DT18RKG?
The input voltage range is 2.0 V to 9.0 V, and the output voltage accuracy at 25°C is ±1%.
- Does the NCV5661DT18RKG have an enable function?
Yes, it has an enable function that allows for on/off control of the regulator.
- What is the purpose of the Error Flag in the NCV5661DT18RKG?
The Error Flag provides a logic low signal when the output voltage drops below the nominal value.
- What is the thermal shutdown temperature of the NCV5661DT18RKG?
The thermal shutdown temperature is 160°C.
- What type of capacitors are recommended for input and output stability?
For input, a 150 μF OSCON capacitor with an ESR of 50 mΩ is recommended. For output, low ESR electrolytic or multilayer ceramic capacitors should be used.
- Is the NCV5661DT18RKG AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive applications.
- What are the typical applications of the NCV5661DT18RKG?
Typical applications include servers, ASIC power supplies, networking equipment, gaming and STB modules, and constant current sources.
- What is the package type of the NCV5661DT18RKG?
The package type is DPAK-5 or DFN6 3x3.3 mm.
- How does the current limit protection work in the NCV5661DT18RKG?
The device is internally clamped to 1.5 A to prevent exceeding the maximum power dissipation.
