Overview
The LMZ14203H, produced by Texas Instruments, is a SIMPLE SWITCHER® power module designed for high-efficiency step-down DC-DC conversion. This module is part of the LMZ14203H series, which includes variants with different output current ratings. The LMZ14203H specifically can drive up to 3-A loads with exceptional power conversion efficiency, line and load regulation, and output accuracy. It is available in an innovative package that enhances thermal performance and allows for easy mounting and manufacturing.
The module accepts an input voltage range of 6 V to 42 V and can deliver an adjustable output voltage as low as 5 V. It requires only three external resistors and four external capacitors to complete the power solution, making it a reliable and robust design for various applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 6 | - | 42 | V |
| Output Voltage Range | 5 | - | - | V |
| Output Current | - | - | 3 | A |
| Efficiency | - | 93-94% | - | % |
| Junction Temperature Range | -40 | - | 125 | °C |
| Thermal Shutdown | - | 165 | - | °C |
| Switching Frequency | - | Up to 1 MHz | - | - |
| Package Type | - | TO-PMOD (7-pin) | - | - |
| Package Size | - | 10.16 mm × 9.85 mm | - | - |
Key Features
- Integrated Shielded Inductor: Simplifies PCB layout and reduces EMI.
- Flexible Start-Up Sequencing: Allows for external soft-start and precision enable.
- Protection Features: Includes thermal shutdown, input undervoltage lockout, output overvoltage protection, short-circuit protection, and output current limit.
- High Efficiency: Reduces system heat generation with efficiencies up to 97%.
- Low Radiated EMI: Compliant with EN 55022 Class B and FCC Part 15 Subpart B.
- No Compensation Required: Simplifies design and reduces component count.
- Low Output Voltage Ripple: Ensures stable output voltage.
- Pin-to-Pin Compatible Family: Compatible with other LMZ14203H/2H/1H and LMZ12003/2/1 models.
Applications
- Intermediate Bus Conversions: Suitable for converting to 12-V and 24-V rails.
- Time-Critical Projects: Ideal for projects requiring quick and reliable power solutions.
- Space Constrained and High Thermal Requirement Applications: Compact package with good thermal performance.
- Negative Output Voltage Applications: Can be used for negative output voltage requirements.
- General Industrial and Automotive Systems: Robust design suitable for various industrial and automotive applications.
Q & A
- What is the input voltage range of the LMZ14203H?
The input voltage range is from 6 V to 42 V.
- What is the maximum output current of the LMZ14203H?
The maximum output current is 3 A.
- What is the typical efficiency of the LMZ14203H?
The typical efficiency is up to 94%.
- What are the key protection features of the LMZ14203H?
The module includes thermal shutdown, input undervoltage lockout, output overvoltage protection, short-circuit protection, and output current limit.
- What is the package type and size of the LMZ14203H?
The package type is TO-PMOD (7-pin) with a size of 10.16 mm × 9.85 mm.
- Does the LMZ14203H require any external compensation components?
No, the LMZ14203H does not require any external compensation components.
- What is the junction temperature range of the LMZ14203H?
The junction temperature range is from -40°C to 125°C.
- Is the LMZ14203H compliant with any EMI standards?
Yes, it is compliant with EN 55022 Class B and FCC Part 15 Subpart B.
- Can the LMZ14203H be used for negative output voltage applications?
Yes, it can be used for negative output voltage applications.
- What is the recommended minimum input capacitance for the LMZ14203H?
The recommended minimum input capacitance is 10-uF X7R ceramic with a voltage rating at least 25% higher than the maximum applied input voltage.
