TPS63000DRCR Voltage Regulators

Technical Specifications of TPS63000DRCR

Datasheet	TPS63000DRCR 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)	1.8V
Voltage – Input (Max)	5.5V
Voltage – Output (Min/Fixed)	1.2V
Voltage – Output (Max)	5.5V
Current – Output	1.6A (Switch)
Frequency – Switching	1.25MHz ~ 1.5MHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	10-VFDFN Exposed Pad
Supplier Device Package	10-VSON (3×3)

TPS63000DRCR Description

The TPS6300x series of devices can power products that use one lithium-ion or lithium-polymer battery cell or two or three alkaline, NiCd, or NiMH batteries. A single-cell Li-Ion or Li-Polymer battery can be discharged to 2.5V or less, which enables output currents of up to 1200 mA. The buck-boost converter uses a pulse-width-modulation (PWM) controller with synchronous rectification that runs at a fixed frequency to attain its high-efficiency level.

The converter enters Power Save mode as the load current declines, maintaining its efficiency over various loads. You can lock the converter into a specific switching frequency by disabling the Power Save option. Typically, the maximum average switch current is restricted to 1800 mA. Depending on the device, the output voltage is either fixed or configurable using an external resistor divider. By turning off the converter, battery life can be maintained. The load on the battery is released when the device shuts down. The device has a 10-pin QFN PowerPADTM packaging measuring 3 by 3 millimeters (DRC).

TPS63000DRCR Features

• 96% Maximum Efficiency
• Step down mode at 3.3V with a 1200-mA output current (VIN = 3.6V to 5.5V).
• In Boost Mode (VIN > 2.4V), the output current can reach up to 800 mA at 3.3V.
• Automatic Switching between Boost and Step Down Mode.
• The Quiescent Current of the Device is less than 50 A.
• Range of Input Voltage: 1.8V to 5.5V.
• Options for Fixed and Adjustable Output Voltage from 1.2V to 5.5V

Detailed Description

● Controller Circuit

The controlling circuit of the gadget is built using an average current mode topology. The average inductor current is regulated by a fast-current regulator loop, which is managed by a voltage control loop. The input and output of the controller both use feedforward voltage logic addition. By keeping an eye on input and output voltage changes, the modulator’s duty cycle can be swiftly altered in reaction to problems. The voltage error amplifier’s feedback input is located on the FB pin. A resistive voltage divider must be connected to that pin to offer various output voltages.

For sensing reasons, FB must be connected directly to the output voltage in the case of constant output voltages. The internal resistive divider has been decreased in versions with a constant output voltage. The feedback voltage will be compared to an internal reference voltage to provide a precise and consistent output voltage. The controller circuit measures the peak and average input currents. The maximum input power and peak current can be regulated to offer a dependable and secure operation under any conditions. The device also has a temperature sensor to guard against overheating-related damage.

● Synchronous Operation

The four integrated N-channel MOSFETs of the device ensure synchronous power conversion under all operating conditions. As a result, the device’s efficiency is preserved throughout a wide range of input voltage and output power. Using two separate ground pins (GND and PGND), ground shift problems caused by the high currents in the switches are less likely to occur. All additional control connections must adhere to the GND pin’s specifications. The power switches are connected to the PGND terminal.

The single-ground connection should be close to the GND pin on the PCB. When the converter is turned off, the four-switch architecture ensures that the load is always isolated from the input.

● Buck-Boost Operation

Automatic switching between step-down and boost operation and back again ensures that the output voltage is adequately regulated throughout a wide range of input voltages. In this configuration, one switch is always “on,” and the other is “off,” serving as the “active” and “rectifying” switches, respectively. When the input voltage is greater than the output voltage, the device functions as a step-down converter (buck), and when the input voltage is less than the output voltage, the device functions as a boost converter.

All 4 switches are never on at once in any mode of operation. This switching control method allows the converter to keep its high efficiency at its most crucial operating point, where the input and output voltages are close. We maintain a low RMS current via the switches and inductors to reduce switching and conduction losses. Having only one active and one passive switch also helps to minimize switching losses. The other two switches have no switching losses since one is always on, and the other is always off.

● Power Save Mode and Synchronization

Changing the mode of operation is done by manipulating the PS/SYNC pin. PS/SYNC needs to be turned down to facilitate power saving. At low loads, switching to power-saving mode can increase efficiency. If the output voltage is at or above its nominal value and the average inductor current drops below roughly 300 mA, the converter shuts down and saves power. If the output voltage drops below its nominal value, the device begins operating with an average inductor current that is more than what is needed to drive the current load.

One or many pulses may be used to complete an operation. Once the prerequisites for shutting down are met again, the converter will cease its function. To turn off the power save mode, set the value of PS/SYNC to high in the programming interface. The device must lock in time with the external clock when a clock signal is attached to the PS/SYNC pin. Since a PLL is used for synchronization, it can sync to frequencies lower and higher than the internal clock with no problems. Even if some clock pulses are lost, the PLL can keep the converter running normally. Logic levels are typically used with the PS/SYNC input.

● Device Enable

The device is turned on when EN has a high value. Power is turned off when EN is switched to GND. The regulator switches off, disables its internal control circuitry, and disconnects the load from the input once it is in shutdown mode. This also implies that the output voltage may drop below the input voltage during the shutdown. High peak currents from the input are reduced by restricting the duty cycle and peak current of the converter at startup.

Conclusion

A switching power supply structure is crucial at high peak currents and high switching frequencies. The regulator may exhibit stability and electromagnetic interference (EMI) issues with proper layout. That’s why it’s important to utilize short, wide traces for the power ground and the primary current path. Input and output capacitors and inductors should be as close to the IC as practicable. To reduce the impact of ground noise, connect the power ground and the control ground to separate ground nodes.

You can connect these ground points to any IC’s ground pins. A control ground pin on the IC is the optimal location for the feedback divider. It is advisable to utilize short traces for the control ground, keeping them physically distinct from the power ground. By doing so, issues associated with ground shift, which can arise when power ground current and control ground current superimpose, are avoided.

If you need additional information or wish to order TPS63000DRCR, you’ve come to the correct place. Give us a call at ICRFQ, your leading electronic distributor in China, and we will ensure you receive the best goods at a reasonable price.

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