Overview
The LMZM33603RLRR, produced by Texas Instruments, is a highly integrated 3-A step-down DC/DC power module designed for a wide range of applications. This module combines a DC/DC converter, power MOSFETs, a shielded inductor, and necessary passives into a compact, low-profile QFN package. The device is optimized for small form factor designs, requiring as few as four external components, and eliminates the need for loop compensation and magnetics selection. It offers adjustable switching frequency, synchronization to an external clock, and features such as power-good output, programmable undervoltage lockout, prebias start-up, and overcurrent and over-temperature protection.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4 V to 36 V |
| Output Voltage Range | 1 V to 13.5 V at 3 A, 1 V to 18 V at 2 A |
| Output Current | Up to 3 A |
| Switching Frequency | Adjustable from 200 kHz to 1.2 MHz |
| Efficiency | Up to 95% |
| Package Type | 18-pin QFN, 9 mm × 7 mm × 4 mm |
| Operating Junction Temperature | –40°C to +125°C |
| Operating Ambient Temperature | –40°C to +105°C |
| Junction-to-Ambient Thermal Resistance | 18.9 °C/W |
Key Features
- Complete integrated power solution with minimal external components required.
- Adjustable switching frequency and synchronization to an external clock.
- Power-good output and programmable undervoltage lockout.
- Prebias start-up and overcurrent and over-temperature protection.
- Meets EN55011 Class B radiated EMI standards.
- Compact, low-profile QFN package with exposed bottom pads for thermal enhancement.
Applications
- Factory and building automation.
- Smart grid and energy systems.
- Industrial applications.
- Medical devices.
- Defense and aerospace.
- Inverted output applications.
Q & A
- What is the input voltage range of the LMZM33603? The input voltage range is from 4 V to 36 V.
- What is the maximum output current of the LMZM33603? The maximum output current is up to 3 A.
- How can the switching frequency be adjusted? The switching frequency can be adjusted using an external resistor or a sync signal, and it ranges from 200 kHz to 1.2 MHz.
- What is the efficiency of the LMZM33603? The efficiency can be up to 95%.
- What are the operating temperature ranges for the LMZM33603? The operating junction temperature range is –40°C to +125°C, and the operating ambient temperature range is –40°C to +105°C.
- What kind of thermal management does the LMZM33603 offer? The device features an 18-pin QFN package with exposed bottom pads for thermal enhancement.
- Does the LMZM33603 meet any specific EMI standards? Yes, it meets EN55011 Class B radiated EMI standards.
- How is the output voltage adjusted on the LMZM33603? The output voltage is adjusted using an external resistor divider connected to the FB pin.
- What protection features does the LMZM33603 include? It includes overcurrent and over-temperature protection, as well as programmable undervoltage lockout.
- Can the LMZM33603 be used in inverted output applications? Yes, it can be used in inverted output applications.
