Mikroelektronika d.o.o.
Tableau à clic LDO
Tableau à clic LDO
Impossible de charger la disponibilité du service de retrait
Key Features:
- Haute précision, faible bruit de tension de sortie, large plage de tension d'entrée, tension de sortie programmable et réglable par broche, excellente réponse transitoire de charge, alimentation de polarisation pour améliorer les performances, et plus encore
- Basé sur le TPS7A83A - régulateur linéaire à faible chute de tension de Texas Instruments
- Peut être utilisé pour alimenter des composants sensibles au bruit tels qu'un sérialiseur et un désérialiseur, des ADC, des DAC et des composants RF
- mikroBUS : interface I2C
Présentation du LDO Click Board™ : alimentez vos composants sensibles au bruit en toute confiance
Découvrez la LDO Click Board™, une carte complémentaire compacte et hautement efficace conçue pour réguler la tension de sortie d'une alimentation à un niveau inférieur tout en maintenant une tension de chute incroyablement faible. Découvrez la puissance du TPS7A83A, un régulateur linéaire (LDO) à faible bruit et faible chute de tension de Texas Instruments, capable de fournir 2 A avec une chute maximale de seulement 200 mV. Avec une tension de sortie programmable par broche allant de 0,8 V à 3,95 V avec une résolution de 50 mV ou réglable de 0,8 V à 5,2 V à l'aide d'un diviseur de résistance externe, la LDO Click Board™ est parfaite pour alimenter des composants sensibles au bruit comme les sérialiseurs et les désérialiseurs, les ADC, les DAC et les composants RF. Le TPS7A83A hautes performances garantit un bruit de phase et une gigue d'horloge minimes générés par l'alimentation pour un fonctionnement fluide.
Bibliothèque compatible avec mikroSDK pour un développement logiciel transparent
La carte LDO Click Board™ est prise en charge par une bibliothèque compatible mikroSDK, offrant une gamme de fonctions qui facilitent le développement logiciel. Cette carte Click Board™ est un produit entièrement testé, prêt à être utilisé immédiatement sur un système équipé du socket mikroBUS™. Bénéficiez de performances et d'une stabilité inégalées avec la carte LDO Click Board™, votre solution ultime pour alimenter les composants sensibles au bruit.
How Does The LDO Click Board™ Work?
The LDO Click Board™ is based on the TPS7A83A, a high-current (2A), low-noise, high-accuracy, and low-dropout linear voltage regulator from Texas Instruments. The TPS7A83A has several features that make it useful in various applications, like high accuracy, high-PSR output, and fast transient response for voltage regulation part, as well as certain internal protections like thermal shutdown and foldback current limit. All these features make this Click board™ a robust solution for many challenging problems in generating a clean, accurate power supply.
The TPS7A8300A can be easily enabled using the EN pin of the mikroBUS™ socket, offering a switch operation to turn ON/OFF the TPS7A8300A. It has a pin-programmable output voltage from 0.8V-3.95V with a 50mV resolution, or it can be adjustable from 0.8V-5.2V using an external resistor divider (R9 and R10). The pin-programmable output voltage is possible thanks to the TCA9534A, an I2C-configurable I/O expander also from Texas Instruments, which by setting the appropriate voltage setting pins on the TPS7A83A, which are connected to an internal feedback network, programs the regulated output voltage.
The TCA9534A expander also can choose the least significant bit (LSB) of its I2C slave address by positioning SMD jumpers labelled as ADDR SEL to an appropriate position marked as 0 and 1. The adjustable output voltage is achieved through voltage divider resistors whose corresponding values can be found in the datasheet table.
One of the power terminals on the board is the VBIAS terminal, which minimizes the internal charge-pump noise when the internal voltage is clamped, thereby reducing the overall output noise floor. This rail enables the use of low-input voltage, low-output (LILO) voltage conditions (VEXT=1.2V, VOUT =1V) to reduce the power dissipation of the TPS7A8300A. Using a VBIAS voltage improves DC and AC performance for VEXT≤2.2V.
The LDO Click Board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. Additionally, there is a possibility for the TPS7A83A power supply selection via jumper labelled as VIN SEL to supply the TPS7A83A from an external power supply terminal in the range from 1.1V to 6.5V or with selected mikroBUS™ power rail. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
| Type | Buck, Linear |
| Applications | It can be used to power noise-sensitive components such as serializers and deserializer, ADCs, DACs, and RF components |
| On-board modules | TPS7A83A - low-dropout linear regulator from Texas Instruments |
| Key Features | High accuracy, low output voltage noise, wide input voltage range, pin-programmable and adjustable output voltage, excellent load transient response, bias supply to improve performance, and more |
| Interface | I2C |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the LDO Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| NC | 2 | RST | INT | 15 | NC | ||
| Enable | EN | 3 | CS | RX | 14 | NC | |
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1-JP3 | ADDR SEL | Left | I2C Address Selection 0/1: Left position 0, Right position 1 |
| JP4 | VIN SEL | Right | TPS7A83A Power Supply Selection VEXT/VCC: Left position VEXT, Right position VCC |
| JP5 | VCC SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
| R9-R10 | R9-R10 | Unpopulated | Adjustable Output Voltage Resistors |
LDO CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| External Power Supply VEXT | 1.1 | - | 6.5 | V |
| External Bias Supply | 3 | - | 6.5 | V |
| Output Voltage | 0.8 | - | 5.2 | V |
| Output Current | - | - | 2 | A |
Software Support
We provide a library for the LDO Click Board™ and a demo application (example), developed using MikroE compilers. The demo can run on all the main MikroE development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the LDO Click Board™ driver.
Key functions
-
ldo_enable_deviceThis function enables the device by setting the EN pin to HIGH logic state. -
ldo_disable_deviceThis function disables the device by setting the EN pin to LOW logic state. -
ldo_set_voutThis function sets the voltage output.
Example Description
This example demonstrates the use of the LDO Click Board™ by changing the output voltage.
void application_task ( void )
{
static uint16_t vout = LDO_VOUT_MIN;
if ( LDO_OK == ldo_set_vout ( &ldo, vout ) )
{
log_printf ( &logger, " VOUT: %u mVrnn", vout );
}
vout += LDO_VOUT_STEP;
if ( vout > LDO_VOUT_MAX )
{
vout = LDO_VOUT_MIN;
}
Delay_ms ( 3000 );
}
The full application code, and ready-to-use projects can be installed directly from NECTO Studio. The package Manager (recommended), downloaded from our LibStock™ or found on the MikroE Github account.
Other MikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.LDO
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroE compilers.
MIKROSDK
The LDO Click Board™ is supported with mikroSDK - MikroE Software Development Kit, that needs to be downloaded from the LibStock and installed for the compiler you are using to ensure proper operation of mikroSDK compliant Click board™ demo applications.
Tableau à clic LDO
Frequently Asked Questions
Ask a Question-
Is the LDO Click Board™ a tested and ready-to-use product?
Yes, the LDO Click Board™ comes as a thoroughly tested product, ready for use on a system equipped with the mikroBUS™ socket. You can integrate it into your system without additional testing or modifications.
-
What software development support is available for the LDO Click Board™?
The LDO Click Board™ is supported by a mikroSDK-compliant library. This library includes functions that simplify software development for the Click board™.
-
What software development support is available for the LDO Click Board™?
The LDO Click Board™ is supported by a mikroSDK-compliant library. This library includes functions that simplify software development for the Click board™.
-
What are the benefits of using the LDO Click Board™ for noise-sensitive components?
The LDO Click Board™ is an excellent choice for powering noise-sensitive components such as serializer and deserializer, ADCs, DACs, and RF components. The high performance of the TPS7A83A LDO limits power-supply-generated phase noise and clock jitter, ensuring clean and reliable power for these components.
-
Can the output voltage be adjusted beyond the pin-programmable range?
Yes, the output voltage can be adjusted beyond the pin-programmable range. Using an external resistor divider, the output voltage can be set between 0.8V and 5.2V.
-
What is the output voltage range of the TPS7A8300A LDO?
The TPS7A8300A LDO has a pin-programmable output voltage range from 0.8V to 3.95V with a 50mV resolution.
-
What is the function of the TPS7A83A LDO?
The TPS7A83A LDO is capable of sourcing 2A with only 200mV of maximum dropout. It is designed to provide a stable and regulated output voltage.
-
What is the LDO Click Board™?
The LDO Click Board™ is a compact add-on board designed to regulate the output voltage of a power supply to a lower level with a very low dropout voltage. It features the TPS7A83A, a low-noise, low-dropout linear regulator (LDO) from Texas Instruments.