Overview
The LMZ10503TZX-ADJ/NOPB is a 3-A power module from Texas Instruments, designed to provide a complete and easy-to-use DC-DC conversion solution. This module is capable of driving up to a 3-A load with high power conversion efficiency, precise output voltage accuracy, and robust line and load regulation. It is packaged in an innovative TO-PMOD (7-pin) package that enhances thermal performance and supports both hand and machine soldering. The LMZ10503 is suitable for a wide range of applications, including point-of-load conversions, space-constrained designs, and noise-sensitive systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.95 | - | 5.5 | V |
| Output Voltage Range | 0.8 | - | 5 | V |
| Output Current | - | - | 3 | A |
| Total Output Power | - | - | 15 | W |
| Switching Frequency | 750 | 1000 | 1160 | kHz |
| Feedback Voltage Accuracy | 0.785 | 0.8 | 0.812 | V |
| Thermal Shutdown Temperature | - | - | 145 | °C |
| Junction-to-Ambient Thermal Resistance | - | - | 20 | °C/W |
Key Features
- Integrated shielded inductor for reduced EMI and improved thermal performance.
- Flexible start-up sequencing using external soft start, tracking, and precision enable.
- Protection against in-rush currents and faults, including input UVLO and output short circuit.
- Single exposed pad and standard pinout for easy mounting and manufacturing.
- Pin-to-pin compatible with LMZ10504 and LMZ10505 for design flexibility.
- High efficiency up to 96% to reduce system heat generation.
- Low radiated emissions (EMI) compliant with EN55022 Class B standard.
- Fast transient response suitable for powering FPGAs and ASICs.
- Externally programmable soft-start capacitor for controlled startup.
- Lossless cycle-by-cycle peak current limit, thermal shutdown, and prebiased start-up.
Applications
- Point-of-load conversions from 3.3-V and 5-V rails.
- Space-constrained applications where compact size is crucial.
- Noise-sensitive applications such as transceivers and medical devices.
Q & A
- What is the maximum output current of the LMZ10503?
The LMZ10503 can deliver up to 3 A of output current.
- What is the input voltage range for the LMZ10503?
The input voltage range is from 2.95 V to 5.5 V.
- What is the output voltage range of the LMZ10503?
The output voltage range is from 0.8 V to 5 V.
- What is the switching frequency of the LMZ10503?
The switching frequency is between 750 kHz and 1160 kHz.
- Does the LMZ10503 have built-in protection features?
- How efficient is the LMZ10503?
The LMZ10503 has an efficiency of up to 96%.
- Is the LMZ10503 suitable for noise-sensitive applications?
- Can the LMZ10503 be used in space-constrained designs?
- How does the soft-start feature work in the LMZ10503?
The soft-start feature is controlled by an external capacitor and eliminates inrush currents during startup.
- Is the LMZ10503 pin-to-pin compatible with other models?
