Overview
The LMZ22005 SIMPLE SWITCHER® power module from Texas Instruments is a highly integrated, easy-to-use step-down DC-DC solution. This module is designed to drive up to 5-A loads and is available in an innovative package that enhances thermal performance. It can accept an input voltage range of 6 V to 20 V and deliver an adjustable output voltage as low as 0.8 V. The LMZ22005 is known for its simplicity, requiring only two external resistors and three external capacitors to complete the power solution. It features a robust design with multiple protection mechanisms, including thermal shutdown, input undervoltage lockout, output overvoltage protection, short circuit protection, and output current limit. The module also supports frequency synchronization and flexible start-up sequencing, making it versatile for various applications.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Input Voltage Range | 6 | 20 | V |
| Output Voltage Range | 0.8 | 6 | V |
| Maximum Total Output Power | 30 | W | |
| Output Current | 5 | A | |
| Efficiency | 92% | % | |
| Operating Junction Temperature Range | -40 | 125 | °C |
| Thermal Shutdown Temperature | 165 | °C | |
| Thermal Shutdown Hysteresis | 15 | °C | |
| Output Voltage Ripple | 9 mVPP | mVPP | |
| Line Regulation | ±0.02% | % | |
| Load Regulation | 1 mV/A | mV/A |
Key Features
- Integrated shielded inductor for reduced noise and improved thermal performance.
- Simple PCB layout with minimal external components (only 5 required).
- Frequency synchronization input (650 kHz to 950 kHz) for noise reduction and system synchronization.
- Flexible start-up sequencing using external soft-start, tracking, and precision enable.
- Protection features include thermal shutdown, input undervoltage lockout, output overvoltage protection, short circuit protection, and output current limit.
- High efficiency up to 92%, reducing system heat generation.
- Low output voltage ripple and low component count.
- Uses PCB as heat sink, eliminating the need for airflow.
- Pin compatible with LMZ23605, LMZ23603, and LMZ22003.
- Fast transient response suitable for powering FPGAs and ASICs.
- Fully enabled for WEBENCH® Power Designer.
Applications
- Point-of-load conversions from 12V input rail.
- Time-critical projects requiring fast transient response.
- Space-constrained and high thermal requirement applications.
- Negative output voltage applications (refer to AN-2027 SNVA425).
Q & A
- What is the input voltage range of the LMZ22005?
The input voltage range is 6 V to 20 V.
- What is the maximum output current of the LMZ22005?
The maximum output current is up to 5 A.
- What is the efficiency of the LMZ22005?
The efficiency can be up to 92%.
- What protection features does the LMZ22005 have?
The module includes thermal shutdown, input undervoltage lockout, output overvoltage protection, short circuit protection, and output current limit.
- Can the LMZ22005 be synchronized with an external frequency source?
- What is the operating junction temperature range of the LMZ22005?
The operating junction temperature range is -40°C to 125°C.
- How many external components are required to complete the power solution with the LMZ22005?
Only two external resistors and three external capacitors are required.
- Is the LMZ22005 suitable for powering FPGAs and ASICs?
- Does the LMZ22005 require airflow for cooling?
No, it uses the PCB as a heat sink, eliminating the need for airflow.
- Is the LMZ22005 compatible with other Texas Instruments power modules?
