Overview
The LMR33630BDDAR from 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 is known for its high efficiency, low EMI, and compact design. 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 LMR33630BDDAR features advanced high-speed circuitry, automatic mode switching between PWM and PFM, and integrated loop compensation, which reduces the need for external components and simplifies PCB layout.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3.8 to 36 | V |
| Output Voltage Range | 1 to 24 | V |
| Output Current | 3 | A |
| Switching Frequency | 400 kHz, 1.4 MHz, 2.1 MHz | |
| Junction Temperature Range | –40 to +125 | °C |
| Package Type | HSOIC (8-pin), VQFN (12-pin) | |
| Power MOSFET RDS-ON | 75-mΩ/50-mΩ | |
| Minimum On-Time | 68 ns | |
| Quiescent Current | 25 µA | |
| Peak Efficiency | > 95% | % |
Key Features
- Ultra-low EMI and switching noise
- Integrated compensation network
- Power-good flag and precision enable
- Automatic mode switching between PWM and PFM
- High light load efficiency and output accuracy
- Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection
- Available in 8-pin HSOIC and 12-pin VQFN packages with wettable flanks
- AEC-Q100-qualified version available
- HotRod™ package with parallel input current paths
- Flexible system interface
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 LMR33630BDDAR?
The input voltage range is from 3.8 V to 36 V. - What is the maximum output current of the LMR33630BDDAR?
The maximum output current is 3 A. - What are the available switching frequencies for the LMR33630BDDAR?
The available switching frequencies are 400 kHz, 1.4 MHz, and 2.1 MHz. - What is the junction temperature range for the LMR33630BDDAR?
The junction temperature range is from –40°C to +125°C. - What types of packages are available for the LMR33630BDDAR?
The device is available in 8-pin HSOIC and 12-pin VQFN packages with wettable flanks. - Does the LMR33630BDDAR have built-in protection features?
Yes, it includes thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. - How efficient is the LMR33630BDDAR?
The device has a peak efficiency of more than 95%. - Is the LMR33630BDDAR suitable for automotive applications?
Yes, an AEC-Q100-qualified version is available. - What is the quiescent current of the LMR33630BDDAR?
The quiescent current is 25 µA. - Does the LMR33630BDDAR support PFM and PWM modes?
Yes, it automatically switches between PFM and PWM modes depending on the load.
