TPS62743YFPR Detailed explanation of pin function specifications and circuit principle instructions

The part number TPS62743YFPR is a product manufactured by Texas Instruments (TI). It is a Low- Power Buck Converter that provides efficient power conversion solutions, typically used in battery-powered devices.

Package Information:

The TPS62743YFPR is housed in a VQFN (Very Thin Quad Flat No-lead) package. It typically comes with 16 pins in this package.

Pin Function and Specifications:

Here’s a breakdown of the pin functions for the 16-pin VQFN package for the TPS62743YFPR:

Pin Number Pin Name Function 1 VIN Input Voltage (2.3V to 5.5V). This is the power input pin that supplies voltage to the converter. 2 GND Ground. Common reference voltage. 3 SW Switch pin. Connects to the inductor in the switching regulator circuit. 4 SW Switch pin (second for the power switch). Used in the same switching operation as Pin 3. 5 VOUT Output Voltage. Provides the regulated output voltage (e.g., 1.8V, 3.3V, etc., depending on the configuration). 6 VSTBY Standby voltage input. Enables the IC to enter a low power mode when not actively converting. 7 EN Enable pin. A logic high on this pin enables the converter, while a logic low disables it. 8 FB Feedback pin. Used for voltage regulation feedback for proper output voltage. 9 SS Soft-start capacitor pin. Helps in controlling the power-up rate of the output voltage. 10 PGND Power Ground. Used to connect the power return current of the switching regulator. 11 PGND Power Ground (connected to Pin 10). Used for power return current. 12 NC No Connection. This pin is unused and should be left unconnected. 13 VOUT Another output voltage pin, often tied internally to the first VOUT pin, ensuring stability and load sharing. 14 PG Power Good indicator. This is a status pin that signals when the output voltage is within acceptable range. 15 VDDIO I/O voltage supply pin. Typically used for logic interfacing and communication with other systems. 16 VDD Digital supply voltage for the internal circuits of the IC.

Pin Usage Instructions:

VIN (Pin 1): Connect to your input power supply. It must be within the 2.3V to 5.5V range to ensure the regulator functions properly. VOUT (Pin 5, Pin 13): Connect to the load requiring regulated power. The voltage output will be determined by the feedback network. SW (Pin 3, Pin 4): These pins are connected to the inductor in the step-down converter's switching circuit. GND (Pin 2): Should be connected to the ground of the power supply. FB (Pin 8): This pin is critical for voltage regulation. It is typically tied to a voltage divider to set the output voltage. EN (Pin 7): This pin should be pulled high to enable the converter. If pulled low, the device will enter shutdown mode. PG (Pin 14): Used for monitoring power good status. If the output voltage is within the set range, this pin will output a high signal.

Frequently Asked Questions (FAQs):

What is the input voltage range for the TPS62743YFPR? The input voltage range is from 2.3V to 5.5V. How do I enable the TPS62743YFPR? To enable the TPS62743YFPR, apply a logic high voltage to the EN pin (Pin 7). What should I connect to the SW pins (Pins 3 and 4)? The SW pins are connected to an external inductor for energy storage during switching. How do I set the output voltage? The output voltage is set using the feedback pin (Pin 8) and an external resistor divider. What is the purpose of the PG pin (Pin 14)? The PG pin is used to signal when the output voltage is within the acceptable range, indicating the converter is working correctly. Can I use the TPS62743YFPR for both 3.3V and 5V output? Yes, depending on the feedback network configuration, the TPS62743YFPR can provide various output voltages such as 3.3V or 1.8V. What is the soft-start function and how do I use it? The soft-start function is implemented by connecting a capacitor to the SS pin (Pin 9). This controls the rate at which the output voltage rises, preventing large inrush currents. What is the role of the VDDIO pin (Pin 15)? The VDDIO pin is used to power the logic section of the device, and it typically interface s with the logic system in your design. Can I leave Pin 12 (NC) unconnected? Yes, Pin 12 is marked as No Connection (NC) and should be left unconnected.

What happens if the EN pin (Pin 7) is tied low?

If the EN pin is tied low, the TPS62743YFPR will enter a shutdown mode, disabling the converter.

What is the minimum input voltage for the TPS62743YFPR?

The minimum input voltage is 2.3V.

Is the TPS62743YFPR suitable for portable devices?

Yes, the low-power design of the TPS62743YFPR makes it suitable for battery-operated portable devices.

How do I connect the output voltage to my load?

The output voltage can be connected directly to the load from either of the VOUT pins (Pin 5 or Pin 13).

What is the function of the VSTBY pin (Pin 6)?

The VSTBY pin is used for controlling the standby mode of the converter, reducing power consumption when the device is idle.

What is the recommended external component selection for the TPS62743YFPR?

Recommended components include inductors, capacitors, and resistors for the feedback network. Consult the datasheet for detailed specifications.

How do I ensure the TPS62743YFPR does not overheat?

Ensure proper grounding, use adequate PCB layout for heat dissipation, and select components rated for the application.

What is the maximum output current that the TPS62743YFPR can supply?

The maximum output current will depend on the specific design configuration and the output voltage chosen. Check the datasheet for current limits under various conditions.

What is the thermal shutdown feature?

The TPS62743YFPR includes a thermal shutdown feature that disables the converter if the internal temperature exceeds safe operating limits.

Can I use the TPS62743YFPR for non-standard output voltages?

Yes, by adjusting the feedback resistors, you can configure the TPS62743YFPR to output non-standard voltages within the specified range.

Where can I find the datasheet for the TPS62743YFPR?

The TPS62743YFPR datasheet is available on the Texas Instruments website and provides comprehensive information about the device's specifications and recommended operating conditions.

This detailed guide includes the pinout and functions, as well as common questions, for the TPS62743YFPR device, formatted according to the requested specifications.