Overview
The LMR33630ADDAR, produced by Texas Instruments, is a SIMPLE SWITCHER® synchronous step-down DC/DC converter designed for rugged industrial applications. This device is part of the LMR33630 family and offers best-in-class efficiency and ease of use. It can drive up to 3 A of load current from an input voltage range of 3.8 V to 36 V, and it provides an output voltage range of 1 V to 24 V. The converter features high light load efficiency, output accuracy, and a compact solution size, making it ideal for various industrial and automotive applications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 3.8 V to 36 V |
| Output Voltage Range | 1 V to 24 V |
| Output Current | Up to 3 A |
| Switching Frequency | 400 kHz, 1.4 MHz, 2.1 MHz |
| Junction Temperature Range | –40°C to +125°C |
| Power MOSFETs RDS-ON | 75-mΩ/50-mΩ |
| Minimum On-Time | 68 ns |
| Quiescent Current | 25 µA |
| Peak Efficiency | > 95% |
| Package Options | 8-pin HSOIC, 12-pin VQFN with wettable flanks |
Key Features
- Ultra-low EMI and switching noise
- Integrated compensation network reducing external components
- Power-good flag and precision enable for flexible system interface
- 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 with peak efficiency > 95%
- Functional Safety-Capable and AEC-Q100-qualified version available
- 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
- Rugged industrial applications requiring high efficiency and low EMI
Q & A
- What is the input voltage range of the LMR33630ADDAR?
The input voltage range is 3.8 V to 36 V.
- What is the maximum output current of the LMR33630ADDAR?
The maximum output current is up to 3 A.
- What are the available switching frequencies for the LMR33630ADDAR?
The available switching frequencies are 400 kHz, 1.4 MHz, and 2.1 MHz.
- What is the junction temperature range of the LMR33630ADDAR?
The junction temperature range is –40°C to +125°C.
- Does the LMR33630ADDAR 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 LMR33630ADDAR?
The device is available in an 8-pin HSOIC package and a 12-pin VQFN package with wettable flanks.
- Is the LMR33630ADDAR suitable for automotive applications?
Yes, it is AEC-Q100-qualified, making it suitable for automotive applications.
- How does the LMR33630ADDAR manage efficiency at light loads?
The device automatically folds back frequency at light load to improve efficiency.
- What is the quiescent current of the LMR33630ADDAR?
The quiescent current is 25 µA.
- Does the LMR33630ADDAR have a power-good flag and precision enable?
Yes, it features a power-good flag and precision enable for a flexible system interface.
