TPS65131RGERG4

Voltage - Output (Min/Fixed):	3.2V, -2V
Base Part Number:	TPS65131
Supplier Device Package:	24-VQFN (4x4)
Package / Case:	24-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	1.38MHz
Current - Output:	1.8A (Switch)
Voltage - Output (Max):	15V, -15V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
Number of Outputs:	2
Output Type:	Adjustable
Topology:	Boost, Buck-Boost
Output Configuration:	Positive and Negative (Dual Rail)
Function:	Step-Up, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS65131RGERG4 Application Field and Working PrincipleThe TPS65131RGERG4 is a low-power multiple output synchronous buck DC/DC converter, which belongs to Texas Instruments’ Power Management IC (PMIC) Voltage Regulators family, and to more specifically, DC/DC Switching Regulators. With its low-power requirements and synchronous buck conversion capability, the TPS65131RGERG4 is suitable for operation even in the most energy-conscious projects.Overview and FeaturesThe TPS65131RGERG4 is mainly used for point-of-load (POL) applications, such as power supplies for microprocessors, digital signal processors (DSPs), FPGAs and memory devices. The output voltage can be set between 0.8V and 3.3V using its integrated feedback circuit to ensure the stability of the system. The device can handle up to 12A load current and provides multiple protection features, including under-voltage lockout (UVLO), thermal shutdown (TSD), and over-current protection (OCP).The device consists of two regulated voltage rails, V1 and V2, and can be driven by a 1MHz clock provided by an external oscillator. Output voltage can be precisely tuned via integrated resistive ladder on-board and programmed through an I2C interface. It also features independent enable pins for each rail.System and Design ConsiderationsWhen considering the use of the TPS65131RGERG4 in a system, it is important to consider the various design considerations. The device can handle up to 12A, but the maximum input voltage should be within 3.3V and 6V range. It is also important to pay attention to the qualification temperatures range. The operating junction temperature should not go below -40°C or above 105°C.To ensure proper operation, it is necessary to ensure that the inductor, capacitor and other components used in the system design meet the requirements and specifications of the device. Furthermore, it is also recommended to use ceramic capacitors and low-ESR ceramic inductors to minimize EMI and noise.Working PrincipleThe TPS65131RGERG4 works based on synchronous buck switching principles. When the enable pin is switched on, the driver turns the power switch on, allowing current to flow through the inductor, into the capacitor and out of the load, thus providing the required ouput voltage.As the power switch is turned on and off at a given frequency, current pulses are generated, facilitating the smooth and efficient regulation of voltage. The voltage regulator also uses an integrated resistive ladder for natural compensation and ensure stability of the output voltage.ConclusionThe TPS65131RGERG4 is a low-power multiple output synchronous buck DC/DC converter from Texas Instruments’ PMIC Voltage Regulators family, suitable for point-of-load applications such as power supplies for microprocessors and memory devices. The device operates based on synchronous buck switching principles and uses a resistive ladder for natural compensation. Its maximum load current is 12A and it provides comprehensive protection functions.

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