Overview
The NCP59749MN2ADJTBG is a dual-rail, very low-dropout (LDO) voltage regulator produced by onsemi. This device is capable of providing an output current in excess of 3.0 A with a dropout voltage of 120 mV at full load current. It features adjustable output voltage, programmable soft-start, and internal protection mechanisms such as thermal shutdown and output current limiting. The regulator is stable with ceramic and other types of output capacitors greater than or equal to 2.2 µF. It is available in a QFN20 5x5 package, making it suitable for a variety of applications requiring high current and low dropout voltage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (VIN) | 0.8 to 5.5 | V |
| Bias Voltage Range (VBIAS) | 2.7 to 5.5 | V |
| Output Voltage Range (VOUT) | 0.8 to 3.6 | V |
| Dropout Voltage (VIN - VOUT) | 120 mV at 3 A | mV |
| Maximum Output Current (IOUT) | Internally Limited | A |
| Power Supply Rejection Ratio (PSRR) | 60 dB at 1 kHz | dB |
| Thermal Shutdown Temperature | +165°C | °C |
| Package Type | QFN20 5x5 | |
| Operating Temperature Range | -40°C to +125°C | °C |
Key Features
- High output current capability: up to 3.0 A
- Low dropout voltage: 120 mV at 3 A
- Adjustable output voltage: from 0.8 V to 3.6 V
- Programmable soft-start: controlled by an external capacitor
- Internal protection features: thermal shutdown and output current limiting
- Open drain Power Good (PG) output for monitoring
- Fast transient response
- Stable with any type of output capacitor ≥ 2.2 µF
- Enable pin with internal hysteresis and deglitch filter
Applications
- Consumer and industrial equipment point of load regulation
- FPGA, DSP, and logic power supplies
- Switching power supply post-regulation
- Any application requiring high current and low dropout voltage
Q & A
- What is the maximum output current of the NCP59749MN2ADJTBG?
The maximum output current is internally limited, but it can provide up to 3.0 A.
- What is the dropout voltage of the NCP59749MN2ADJTBG?
The dropout voltage is 120 mV at 3 A.
- How is the output voltage adjusted on the NCP59749MN2ADJTBG?
The output voltage can be adjusted from 0.8 V to 3.6 V using a resistor divider between the output and the FB input.
- What is the purpose of the Power Good (PG) pin?
The Power Good (PG) pin is an open-drain, active-high output that indicates the status of VOUT, useful for monitoring and sequencing other devices.
- How does the programmable soft-start feature work?
The soft-start ramp time is programmable by an external capacitor connected to the SS pin, which controls the start-up time and limits inrush current.
- What type of capacitors can be used with the NCP59749MN2ADJTBG?
The device is stable with any type of output capacitor ≥ 2.2 µF, including ceramic capacitors.
- What is the thermal shutdown temperature of the NCP59749MN2ADJTBG?
The thermal shutdown temperature is +165°C.
- How is the enable function used on the NCP59749MN2ADJTBG?
The enable pin turns the regulator on or off; it must not be left floating and should be connected to VIN or VBIAS if not used.
- What is the operating temperature range of the NCP59749MN2ADJTBG?
The operating temperature range is -40°C to +125°C.
- What package type is the NCP59749MN2ADJTBG available in?
The device is available in a QFN20 5x5 package.
