Overview
The LMR33630CDDAR from Texas Instruments is a SIMPLE SWITCHER® synchronous step-down DC/DC converter designed for rugged industrial applications. This regulator delivers best-in-class efficiency and is easy to use, making it suitable for a wide range of applications. It can drive up to 3 A of load current from an input voltage of up to 36 V and provides high light load efficiency and output accuracy in a very small solution size. The device is available in both 8-pin HSOIC and 12-pin VQFN packages with wettable flanks, and it is also available in an AEC-Q100-qualified version for automotive applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3.8 V to 36 V | V |
| Output Voltage Range | 1 V to 24 V | V |
| Output Current | Up to 3 A | A |
| Switching Frequency | 400 kHz, 1.4 MHz, 2.1 MHz | Hz |
| Junction Temperature Range | –40°C to +125°C | °C |
| Power MOSFETs RDS-ON | 75-mΩ/50-mΩ | mΩ |
| Minimum On-Time | 68 ns | ns |
| Quiescent Current | 25 µA | µA |
| Peak Efficiency | > 95% | % |
| Package Options | 8-pin HSOIC, 12-pin VQFN |
Key Features
- Ultra-low EMI and low switching noise
- Integrated compensation network
- Power-good flag and precision enable
- Thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection
- Automatic frequency foldback at light load to improve efficiency
- High power conversion at all loads
- Flexible system interface
- Available in AEC-Q100-qualified version for automotive applications
- HotRod™ package and parallel input current paths for reduced EMI
Applications
- Motor drive systems: drones, AC inverters, VF drives, servos
- Factory and building automation systems: PLC CPU, HVAC control, elevator control
- General purpose wide VIN power supplies
- Auxiliary power supplies for servo drives and other industrial equipment
Q & A
- What is the input voltage range of the LMR33630CDDAR?
The input voltage range is from 3.8 V to 36 V. - What is the maximum output current of the LMR33630CDDAR?
The maximum output current is up to 3 A. - What are the available switching frequencies for the LMR33630CDDAR?
The available switching frequencies are 400 kHz, 1.4 MHz, and 2.1 MHz. - What is the junction temperature range for the LMR33630CDDAR?
The junction temperature range is from –40°C to +125°C. - Does the LMR33630CDDAR have built-in protection features?
Yes, it includes thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. - What packages are available for the LMR33630CDDAR?
The device is available in 8-pin HSOIC and 12-pin VQFN packages with wettable flanks. - Is the LMR33630CDDAR suitable for automotive applications?
Yes, it is available in an AEC-Q100-qualified version for automotive applications. - How does the LMR33630CDDAR manage efficiency at light loads?
The device automatically folds back frequency at light load to improve efficiency. - What is the quiescent current of the LMR33630CDDAR?
The quiescent current is 25 µA. - Does the LMR33630CDDAR have a power-good flag and precision enable?
Yes, it features a power-good flag and precision enable for flexible system interface.
