Overview
The LMR33630BDDA from Texas Instruments is a SIMPLE SWITCHER® synchronous step-down DC/DC converter designed for rugged industrial applications. This device 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 LMR33630BDDA features advanced high-speed circuitry, integrated compensation, and low EMI and switching noise, making it an ideal choice for demanding industrial environments.
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 |
| Efficiency | Peak efficiency > 95% |
| Package Options | 8-pin HSOIC, 12-pin VQFN with wettable flanks |
Key Features
- Functional Safety-Capable and configured for rugged industrial applications
- Low EMI and low switching noise
- Integrated compensation network
- Power-good flag and precision enable
- Automatic frequency foldback at light load to improve efficiency
- Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection
- High power conversion at all loads
- Flexible system interface
- Available in AEC-Q100-qualified version
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
Q & A
- What is the input voltage range of the LMR33630BDDA? The input voltage range is from 3.8 V to 36 V.
- What is the maximum output current of the LMR33630BDDA? The maximum output current is up to 3 A.
- What are the available switching frequencies for the LMR33630BDDA? The available switching frequencies are 400 kHz, 1.4 MHz, and 2.1 MHz.
- What is the junction temperature range of the LMR33630BDDA? The junction temperature range is from –40°C to +125°C.
- Does the LMR33630BDDA 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 LMR33630BDDA? It is available in 8-pin HSOIC and 12-pin VQFN packages with wettable flanks.
- Is the LMR33630BDDA suitable for automotive applications? Yes, it is available in an AEC-Q100-qualified version, making it suitable for automotive applications.
- How does the LMR33630BDDA manage efficiency at light loads? The device automatically folds back frequency at light load to improve efficiency.
- What is the purpose of the power-good flag in the LMR33630BDDA? The power-good flag can be used to reset a system microprocessor whenever the output voltage is out of regulation.
- Can the LMR33630BDDA be used in high-EMI environments? Yes, it features low EMI and low switching noise, making it suitable for high-EMI environments.
