Part Number: TPS7A7300RGWR

Manufacturer: Texas Instruments

Description: LDO Voltage Regulators 3A, Sgl Out, Very Low Inp, Config Fixed LDO

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Technical Specifications of TPS7A7300RGWR

Datasheet  TPS7A7300RGWR datasheet
Category Integrated Circuits (ICs)
Family PMIC – Voltage Regulators – Linear
Manufacturer Texas Instruments
Packaging Tape & Reel (TR)
Part Status Active
Regulator Topology Positive Fixed or Adjustable
Voltage – Output 0.9 V ~ 5 V
Current – Output 3A
Voltage – Dropout (Typical)
Number of Regulators 1
Voltage – Input 1.425 V ~ 6.5 V
Current – Limit (Min) 3.2A
Operating Temperature -40°C ~ 125°C
Mounting Type Surface Mount
Package / Case 20-VQFN Exposed Pad
Supplier Device Package 20-VQFN (5×5)

TPS7A7300RGWR Description

Applications requiring very low dropout capability (240 mV at 3 A) with input voltages between 1.5 V and 6.5 V will benefit from the TPS7A7300 low-dropout (LDO) voltage regulator. The output voltage of the TPS7A7300 is user-configurable, operating in the range of 0.9 V to 3.5 V, doing away with the need for external resistors and the potential for error that they introduce.

The TPS7A7300 is stable with ceramic output capacitors, responds quickly to changes in load, and maintains an accuracy of more than 2% regardless of line voltage, input current, or ambient temperature. A soft-start pin enables software to minimize load inrush. Power rail sequencing is also possible thanks to an open-drain Power good signal. The TPS7A7300 comes in a 20-pin VQFN package that is 5 millimeters by 5 millimeters.

TPS7A7300RGWR Features

  • 240 mV at 3 A is the low-dropout voltage.
  • 5 V to 6.5 V is the VIN range.
  • Fixed VOUT Configurable Range: 0.9 V to 3.5 V.
  • Excellent Response to Load and Line Transients.
  • Ceramic output capacitor: Stable.
  • Overline, Overload, and Overtemperature Accuracy 2%.
  • Flexible soft start.
  • Power Effective application for lowering inrush into the load. (PG) Results.
  • VQFN-20 Package, 5 mm by 5 mm.

Detailed Description


The TPS7A7300 is one member of a new class of LDO regulators called “switchable regulators,” It uses cutting-edge technology to provide both a low dropout voltage and a wide range of output voltages. The dropout voltage is 0.24 V at 3 A for this family of LDO regulators. Since 0.24 V at 3 A is less than the voltage difference between the most common voltage rails (1.2 V, 1.5 V, 1.8 V, 2.5 V, 3 V, and 3.3 V), the TPS7A7300 can be converted into a point-of-load (POL) regulator.

The gadget has an approach to set output voltage that the user can customize. The TPS7A7300 allows the output voltage to be set in 50 mV increments between 0.9 V and 3.5 V. Another major benefit is the TPS7A7300’s wide 1.5 V to 6.5 V operational input voltage range. The TPS7A7300 offers excellent transient responsiveness to both line and load. With these capabilities, the TPS7A7300 can be used as a stand-in for various voltage regulators in sub-6 V applications, streamlining stock management.

Feature Description

● User-Configurable Output Voltage

The TPS7A7300 is a single-part-number device, which is unusual for LDOs. Unfortunately, you can only choose between a constant or variable output voltage. Pins labeled 50 mV, 100 mV, 200 mV, 400 mV, 800 mV, and 1.6 V can be used to adjust the TPS7A7300’s output voltage. Starting at the reference voltage of 0.5 V, the output voltage can be increased by the amount specified for each ground-connected pin.

● Undervoltage Lockout (UVLO)

To ensure that the TPS7A7300’s internal circuitry is functioning correctly, the output is locked out using an under-voltage lockout circuit. Due to its de-glitch function, the UVLO circuit often disregards Undershoot of the input voltage at device startup. However, a significant input voltage drop upon device activation may occur if the input line impedance is low. For reasons stated in the Input Capacitor Necessities section, carefully crafting the impedance of the input line is essential.

● Current Limit

Whenever there is a problem with the regulator, the TPS7A7300’s built-in current limit circuitry will kick in to keep it safe. In the event of a current limit, the output supplies a constant current relatively unaffected by the output voltage. The current limit function is a safety feature but should not be utilized routinely. Don’t build anything that relies on the current limit function as a prerequisite for proper operation. When devices are operated at their existing limits for too long, their reliability suffers.

If the enable pin powers the device or the input voltage is elevated over the minimum operational voltage while a low-impedance short occurs on the output, a series of high-current pulses can pass from the input to the output. There is no danger of the device failing because of these events because the energy it needs is small. Input capacitance reduces the upstream supply’s load transient demand.

● Enable

The EN pin toggles between an enabled and disabled (shutdown) configuration for the TPS7A7300. The device is enabled when the EN pin receives a logic high input; it is disabled when it receives a low input. Reduced current consumption occurs when the gadget is disabled.

● Power Good

The TPS7A7300 can be a power good when attached to the PG output pin. An open-drain output from the PG transitions from a high-impedance state to a low-impedance state if the output voltage falls below the threshold VIT(PG) or exceeds the PG hysteresis, Vhys (PG). By connecting a pullup resistor, any device downstream can obtain an active-high enable logic signal (often between the OUT and PG pins). If the output voltage is set to less than 1.8 V and a pullup resistor is connected between the OUT and PG pins, downstream devices cannot accept the PG output as a legitimate high-level logic signal. If so, a pullup resistor should be attached to the IN pin rather than the OUT pin.

Device Functional Modes

Constant and Typical Procedures Under the following situations, the device will maintain its nominal output voltage:

  • There is a voltage difference of at least VIN between the input and output (MIN).
  • When the nominal output voltage is added to the dropout voltage, the resulting value is higher than the input voltage.
  • Since the enable voltage has not dropped below the enable falling threshold, it had previously surpassed the enable rising threshold.
  • Currently, the output current is lower than the maximum allowable current.

The junction temperature of the device is below the maximum junction temperature allowed.

Dropout Operation

The device enters dropout mode if the input voltage is higher than the prescribed dropout voltage, the nominal output voltage, and all other normal operating conditions are met. In this configuration, the output voltage equals the input voltage minus the dropout voltage. When the pass device (often a BJT) is saturated, it can no longer regulate the current flowing through the LDO, leading to a considerable drop in transient performance. In dropout, substantial output voltage variations can be caused by line or load transients.


This gadget can use a wide input voltage range of 1.425 V to 6.5 V. This input source requires tight control. For maximum AC performance, TI suggests utilizing 10-F ceramic capacitors on both the input and output to get the most out of the TPS7A7300RGWR series of fast-transient, low-dropout linear regulators.

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