Overview
The LMZ10503TZ-ADJ/NOPB is a high-performance DC-DC power module designed and manufactured by Texas Instruments. This module is a complete, easy-to-use DC-DC solution capable of driving up to a 3-A load with exceptional power conversion efficiency, output voltage accuracy, and line and load regulation. It is available in an innovative package that enhances thermal performance and allows for both hand and machine soldering.
The LMZ10503 can accept an input voltage rail between 2.95 V and 5.5 V and can deliver an adjustable and highly accurate output voltage as low as 0.8 V. It features one megahertz fixed-frequency PWM switching, which provides a predictable EMI characteristic. The module is designed to operate at high ambient temperatures and offers high efficiency up to 96%, reducing system heat generation.
Key Specifications
| Parameter | Specification |
|---|---|
| Maximum Total Output Power | 15 W |
| Output Current | Up to 3 A |
| Input Voltage Range | 2.95 V to 5.5 V |
| Output Voltage Range | 0.8 V to 5 V |
| Feedback Voltage Accuracy Over Temperature | ±1.63% |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | TO-PMOD (NDW) with 7 pins |
| Switching Frequency | 1 MHz fixed-frequency PWM |
Key Features
- Integrated Shielded Inductor
- Flexible Start-up Sequencing Using External Soft Start, Tracking, and Precision Enable
- Protection Against In-Rush Currents and Faults Such as Input UVLO and Output Short Circuit
- Lossless Cycle-by-Cycle Peak Current Limit, Thermal Shutdown, Input Undervoltage Lockout, and Prebiased Start-Up
- Single Exposed Pad and Standard Pinout for Easy Mounting and Manufacturing
- Pin-to-Pin Compatible With LMZ10504 (4 A / 20 W Maximum) and LMZ10505 (5 A / 25 W Maximum)
- High Efficiency up to 96% Reduces System Heat Generation
- Low Radiated Emissions (EMI) Tested to EN55022 Class B Standard
- Fast Transient Response for Powering FPGAs and ASICs
- Externally Programmable Soft-Start Capacitor Facilitates Controlled Startup
Applications
The LMZ10503TZ-ADJ/NOPB is suitable for a variety of applications that require high-efficiency, reliable, and compact DC-DC power conversion. These include:
- Powering FPGAs and ASICs due to its fast transient response
- Industrial and automotive systems requiring high ambient temperature operation
- Communication and networking equipment where low EMI is crucial
- Medical devices and other applications needing precise and efficient power management
Q & A
- What is the maximum output current of the LMZ10503TZ-ADJ/NOPB?
The maximum output current is up to 3 A.
- What is the input voltage range for the LMZ10503?
The input voltage range is between 2.95 V and 5.5 V.
- What is the output voltage range of the LMZ10503?
The output voltage range is from 0.8 V to 5 V.
- Does the LMZ10503 have built-in protection features?
Yes, it includes protection against in-rush currents, input UVLO, output short circuit, thermal shutdown, and lossless cycle-by-cycle peak current limit.
- What is the switching frequency of the LMZ10503?
The switching frequency is 1 MHz fixed-frequency PWM.
- Is the LMZ10503 compatible with other Texas Instruments power modules?
Yes, it is pin-to-pin compatible with the LMZ10504 and LMZ10505.
- What are the thermal performance characteristics of the LMZ10503?
The module operates at high ambient temperatures and has high efficiency up to 96%, reducing system heat generation.
- How does the LMZ10503 manage EMI?
The LMZ10503 has low radiated emissions (EMI) tested to EN55022 Class B Standard.
- Can the LMZ10503 be used for powering FPGAs and ASICs?
Yes, it is suitable for powering FPGAs and ASICs due to its fast transient response.
- How can the startup sequence be controlled in the LMZ10503?
The startup sequence can be controlled using an externally programmable soft-start capacitor.
