TPS63070RNMR IC

Technical Specifications of TPS63070RNMR

Datasheet	TPS63070RNMR datasheet
Category	Integrated Circuits (ICs)
Family	PMIC – Voltage Regulators – DC DC Switching Regulators
Manufacturer	Texas Instruments
Series	–
Packaging	Tape & Reel (TR)
Part Status	Active
Function	Step-Up/Step-Down
Output Configuration	Positive
Topology	Buck-Boost
Output Type	Adjustable
Number of Outputs	1
Voltage – Input (Min)	2V
Voltage – Input (Max)	16V
Voltage – Output (Min/Fixed)	2.5V
Voltage – Output (Max)	9V
Current – Output	2A
Frequency – Switching	2.4MHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	15-PowerVFQFN
Supplier Device Package	*

TPS63070RNMR Description

The TPS6307x is a buck-boost converter with excellent efficiency and low quiescent current that can be used in systems where the input voltage varies from the output voltage. Currents at the output can reach 2 A in both boost and buck modes. The buck-boost converter relies on a fixed-frequency pulse-width modulation (PWM) controller with synchronous rectification to achieve high efficiency. The converter switches to Power Saving Mode at low load currents to keep efficiency constant across a broad load current range. You can turn off the converter if you want to save power. Power is removed from the battery during the shutdown. The component can be purchased in a QFN package measuring 2.5 mm × 3 mm.

TPS63070RNMR Features

• 0 to 16 volts is the input voltage range.
• 5 to 9 volts is the output voltage range.
• In PWM mode, accuracy is +/- 1% dc.
• Accuracy in PFM mode: +3%/-1% dc.
• buck mode output current of 2 A.
• 2 A boost-mode output current.
• Automatic Switching Between Boost and Step-Down Mode.
• Option for Output Discharge.
• Increased Efficiency at Low Output Power with Power Saving Mode.
• Synchronization option and Forced Fixed Frequency Operation at 2.4 MHz.
• Excellent Power Output.
• VSEL just permits a change in output voltage.
• During the shutdown, disconnect from the load.
• Protection Against Overheating.
• Protection from input/output overvoltage.
• offered in the QFN Package.

TPS63070RNMR Detailed Description

The device’s four built-in N-channel MOSFETs maintain the TPS6307x’s synchronous power conversion in all settings. It maintains the device’s efficiency across a broad input voltage and output power range. The device can automatically switch between buck and boost operation and back again to maintain a constant output voltage across a wide range of input voltages. It always has one on, one-off, one active, and one reversing switch. Thus, it functions as a buck converter when the input voltage exceeds the output voltage and as a boost converter when the input voltage is less than the output voltage.

All 4 switches are never on at once in any mode of operation. The RMS current through the switches and inductor is kept low to reduce switching and conduction losses. Switching losses are eliminated because one of the other two switches is always on and the other is always off. This switching control ensures the converter’s efficiency remains high across its entire input voltage range. This gadget can easily switch between buck and boost, or boost and buck, modes of operation.

Feature Description

● Control Loop Description

The gadget uses an average current mode topology in its controller circuit. A rapid current regulator loop controlled by a voltage control loop controls the average inductor current. We will assume that the gmv input to the transconductance amplifier is constant. The typical inductor current is calculated by gmv. The inductor current may be recreated by monitoring the current flowing through the high-side buck MOSFET. This current is identical to the boost mode inductor current.

Current is measured while the same MOSFET is on in buck mode. The current is regenerated internally throughout the off-time from its maximum value at the end of the on-time cycle. The current error, calculated by subtracting the actual from the ideal average current, is then amplified and compared to the sawtooth ramp of the Buck or the Boost, depending on the situation. Signals can trigger either the Buck MOSFETs or the Boost MOSFETs, depending on which ramp it crosses. Whenever the input voltage is relatively near to the output voltage After one buck cycle comes a boost cycle. Repeating a mode for more than three cycles in a row is prohibited in this scenario. This kind of control ensures the best control robustness and efficiency in the buck-boost area. The switching frequency is halved to maintain a usable minimum on-time for input voltages above 9 V and Vout below 2.2 V.

If the output voltage drops below 1.2V, the back-gate diode of the low-side input FET and the high-side output FET is employed for conduction instead of the active FET switching. Moreover, a negative current limit is included in TPS6307x. Because of this, the inductor’s current might move in the other direction, from the output to the input. This is essential not just for TEC applications, in which the TEC cell is situated between the input and output of the converter, but also for forced PWM functioning at a low output current.

● Precise Enable

The TPS63070’s enable pin isn’t just a digital input—it also checks the input voltage against a predefined threshold of 0.8V for a rising input. This permits the pin to be driven by a slowly varying voltage, making it possible to utilize an external RC network to control the power-on delay precisely. On average, a falling edge input’s enable threshold is 100mV lower than a rising edge threshold. It goes into action when the TPS63070 detects the rising threshold has been crossed. To ensure effective operation, the EN pin must be grounded. When the EN pin is pulled low, the device powers off.

When in this mode, all of the MOSFETs and other control electronics on the inside are disabled. The user can establish a supply threshold with an external voltage divider and the enable pin. Instead of connecting EN to VIN, a resistor in the 1k to 1M range should be used in series. The resistor can be shared if many inputs, such as EN and PS/SYNC, are wired to VIN. If the pin is powered by an analogue or digital signal rather than a supply voltage, then a resistor is unnecessary.

● Power Good

The device’s output voltage is measured and compared to its nominal value, and if it has been attained, the gadget will give a good output power. The output voltage monitor’s current state triggers the PG signal. The power good circuit is active whenever VIN exceeds the undervoltage lockout threshold and the converter is active. The PG pin is driven low when the output voltage is below the regulated level. After the set point is reached, PG has a high impedance state. A pull-up resistor must be connected externally to the PG output. This resistor can be pulled to any voltage at the limit of its output voltage rating.

Conclusion

With features like synchronous rectification, Power Saving Mode, and load separation after shutdown, the TPS6307x is an extremely flexible and powerful buck-boost converter. Safe and dependable operation is guaranteed by overtemperature and overvoltage protection in this compact and portable power management solution. Choosing ICRFQ as your supplier means you can rely on top-quality products and excellent customer service. By upgrading your system with the TPS6307x from ICRFQ, you can enjoy the benefits of a high-quality and dependable component that will meet the requirements of many different applications. Invest in the TPS6307x today and use its advanced technology and reliability.

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