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 requires only a minimal number of external components, including two resistors and three capacitors, to complete the power solution. It features a robust design with multiple protection mechanisms such as thermal shutdown, input undervoltage lockout, output overvoltage protection, short circuit protection, and output current limit. The module also supports start-up into a prebiased output and synchronization over a 650- to 950-kHz switching frequency range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Total Output Power | 30 | W |
| Output Current | Up to 5 | A |
| Input Voltage Range | 6 to 20 | V |
| Output Voltage Range | 0.8 to 6 | V |
| Efficiency | Up to 92% | % |
| Junction Temperature Range | -40 to 125 | °C |
| Switching Frequency Range | 650 kHz to 950 kHz | kHz |
| Package Type | NDW (7-pin) | - |
| Body Size | 10.16 mm × 9.85 mm | mm |
Key Features
- Integrated shielded inductor for reduced noise and improved thermal performance.
- Simple PCB layout with minimal external components required.
- Frequency synchronization input (650 kHz to 950 kHz) for synchronizing with external frequency sources.
- Flexible start-up sequencing using external soft-start, tracking, and precision enable.
- Protection against inrush currents and faults such as input UVLO and output short circuit.
- Single exposed pad for easy mounting and manufacturing, enhancing heat dissipation.
- Fast transient response suitable for powering FPGAs and ASICs.
- Fully enabled for WEBENCH® Power Designer for easy design and simulation.
- Pin compatible with LMZ23605, LMZ23603, and LMZ22003.
- High efficiency reduces system heat generation, and the module is tested to EN55022 Class B(1) standards.
- Low component count and low output voltage ripple.
- No airflow required due to the use of the PCB as a heat sink.
Applications
- Point-of-load conversions from 12V input rail.
- Time-critical projects requiring high reliability and performance.
- Space-constrained applications with high thermal requirements.
- Negative output voltage applications (see AN-2027 SNVA425).
Q & A
- What is the maximum output current of the LMZ22005?
The LMZ22005 can deliver up to 5 A of output current.
- What is the input voltage range for the LMZ22005?
The input voltage range is from 6 V to 20 V.
- What is the output voltage range of the LMZ22005?
The output voltage range is from 0.8 V to 6 V.
- What is the efficiency of the LMZ22005?
The efficiency of the LMZ22005 can be up to 92%.
- Does the LMZ22005 support frequency synchronization?
- What protection features are included in the LMZ22005?
The LMZ22005 includes protection features such as thermal shutdown, input undervoltage lockout, output overvoltage protection, short circuit protection, and output current limit.
- 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, the LMZ22005 uses the PCB as a heat sink and does not require airflow.
- Is the LMZ22005 compatible with other Texas Instruments power modules?
