| |
Input Range |
Output |
| LMZ12003 |
VinMin = 4.5V |
Vout1 = 1.8V |
| VinMax = 20V |
Iout1 = 3.0A
|
| - | - | - |
| LMZ14203 |
VinMin = 6.0V |
Vout1 = 3.3V |
| VinMax = 42V |
Iout1 = 3.0A
|
Design Description
The LMZ12003 and LMZ14203 SIMPLE SWITCHER® power modules are a
complete, easy-to-use DC-DC solution capable of driving up
to a 3A load with exceptional power conversion efficiency,
output voltage accuracy, line and load regulation. The
LMZ12003 and LMZ14203 are available in an innovative package that enhances
thermal performance and allows for hand or machine soldering.
There are 2 designs presented in this Board support package.
The Demonstration board is configured in a low cost, high volume manufacturing
design. The Evaluation board design is designed for easy access to all of the circuits.
The Demonstration board design is in 2 layers, components on both side. The small signal components
using 0603 footprints are located on the reverse side.
The evaluation board design when using the LMZ14203 can accept an input voltage rail between
6V and 42V and when using the LMZ12003 can accept an input voltage
rail between 4.5V and 20V. The devices can deliver an
adjustable and highly accurate output voltage as low as 0.8V
and as high as 6V. The control structure is constant on-time
with input voltage feed forward. This creates a nearly constant
switching frequency across the input voltage range. The control
loop operates well with low ESR output capacitors such
as ceramics. An output feed-forward capacitor across the upper
feedback resistor trims for optimum transient response.
The precision enable input allows for programmable UVLO of
the input supply. The external soft-start capacitor facilitates
controlled startup output rise time.
The design files for both of these designs are included in the design file.
|
Design Resources
Additional Product Resources
| • |
LMZ12003
- 3A SIMPLE SWITCHER® Power Module with 20V Maximum Input Voltage |
| • |
LMZ14203
- 3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage |
- datasheet
- application notes
- Webench Online design tools
- samples
|
LMZ12003 & LMZ14203 Demonstration Boards
LMZ14203 Demonstration Board
|
|
Features
- Integrated shielded inductor
- Flexible startup sequencing using external soft-start,
tracking, and precision enable
- Protection against in-rush currents and faults such as input
UVLO and output short-circuit
- -40°C to +125°C junction temperature operating range
- Single exposed pad and standard pinout for easy
mounting and manufacturing
- Fully enabled for WEBENCH® Power Designer
Application Areas
- Intermediate and Point-of-load conversions from 36V, 24V, 18V, 12V and other voltage rails between 4.5V and 42V
- Space constrained applications
- Extreme temperatures/no air flow environments
- Noise sensitive applications (i.e. transceiver, medical)
- Operates at full load up to 80°C ambient at 12V input
LMZ12003 & LMZ14203 Evaluation Boards
LMZ14203 Evaluation Board
|
LMZ12003DEMO
