TPS62110RSAR Switching Voltage Regulators

Technical Specifications of TPS62110RSAR

Datasheet	TPS62110RSAR 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-Down
Output Configuration	Positive
Topology	Buck
Output Type	Adjustable
Number of Outputs	1
Voltage – Input (Min)	3.1V
Voltage – Input (Max)	17V
Voltage – Output (Min/Fixed)	1.2V
Voltage – Output (Max)	16V
Current – Output	1.5A
Frequency – Switching	1MHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	16-VQFN Exposed Pad
Supplier Device Package	16-QFN (4×4)

TPS62110RSAR Overview

The TPS6211x devices are a family of low-noise synchronous step-down DC-DC converters well-suited for systems running on a 2- to 4-cell Li-ion battery or a 12-V or 15-V rail.

The TPS6211x devices are N- and P-channel power MOSFET switches integrated into synchronous pulse width modulation (PWM) converters. Synchronous rectification helps to improve efficiency and lessen the need for external components. The converter switches to a power-saving, pulse frequency modulation (PFM) mode at low load currents, allowing it to operate at peak efficiency across a broad range of loads. The operating frequency is typically 1 MHz, allowing the use of tiny inductor and capacitor values. An external clock signal between 0.8 MHz and 1.4 MHz can be used to synchronize the device. The converter can function with minimal noise when switched to PWM mode. In standby mode, power consumption drops below 2 A. Products from the TPS6211x family are housed in a 16-pin (RSA) VQFN package and can function in ambient temperatures between -40 and 85 degrees Celsius.

TPS62110RSAR Features for the TPS62110

• Synchronous step-down converter with high efficiency and Up to 95% Effectiveness
• Variable Input Voltage from 3.1V to 17V
• Variable Output Voltage between 1.2 V and 16 V
• Optional Constant-Voltage Outputs 3.3 V and 5 V Options
• Up to 1.4 MHz Externally Synchronizable Clock Frequency
• With an Output Current of Up to 1.5 A
• Exceptionally High Performance across a Broad Range of Load Currents Because of the Pulse Width Modulation/Perturbation Mode
• Maximum Duty Cycle for Minimum Dropout
• Twenty-A Stable Current (Typical)
• Safeguards against overheating and overloading
• Available in 16-Pin VQFN Package

Detailed Description

The TPS6211x family of devices is a synchronous step-down converter that uses a fixed-frequency pulse-width modulation (PWM) frequency of 1 MHz under heavy loads. It enters a power-saving mode under light loads. The converter’s pulse width modulation (PWM) mode employs a novel input-voltage feedforward voltage-mode control mechanism.

Small input and output ceramic capacitors ensure good line and load regulation. Every time the clock signal (S) initiates a new clock cycle, the control logic turns on the P-channel MOSFET switch, the inductor current increases until the comparator trips, and the switch is then switched off.

If the P-channel switch’s current limit is exceeded, the comparator will shut it off. Once the dead time is up, and the current shoot-through is prevented, the N-channel MOSFET rectifier is activated, and the inductor current begins to ramp down. The clock signal turns off the N-channel rectifier, and the P-channel switch is turned on, marking the beginning of a new cycle. The error amplifier and the input voltage set the sawtooth generator’s rising time. As a result, the converter’s duty cycle is effectively regulated for both line and load transients by any input or output voltage variation.

Feature Description

Enable The TPS6211x power-down when EN goes logic low. All operational components, including the power switch, drivers, voltage reference, and oscillator, are disabled during the shutdown. The PG pin is grounded, and the LBO pin is high impedance. In standby mode, the supply current is less than 2 A. Even if the device is put into shutdown by pulling EN to GND, the band gap will remain during the thermal shutdown because it is necessary.

The reverse leakage current is defined under electrical characteristics if an output voltage is present after the device is disabled; this could result from an external voltage source or a supercapacitor. Pull the enable pin high to activate the TPS6211x devices’ soft start functionality. Connecting the EN pin to a voltage other than VI or GND might raise the leakage current from 10 A to 20 A.

Battery Life Indicator (Standard Version) When the low-battery input (LBI) drops below the trip threshold of 1.256 V 1.5%, the low-battery output (LBO) swings low, signaling a dead battery. A resistive divider can be used to modify the battery voltage at which the warning is generated.

For high efficiency at low output current, TI suggests setting the sum of resistors R1 + R2 and R5 + R6 to values between 100 k and 1 M. Any voltage rail between 0 V and 17 V can be used to link an external pullup resistor to VO. The initial 500 ms of operation result in a corrupted LBO output signal. When the LBO is not in use, it has a high resistance. LBI should be connected to the ground if the low-battery comparator feature is not utilized. The low-battery indicator cannot be accessed when the gadget is turned off.

● Enable/Low-Battery Detector – Enhanced Version (TPS62113 Only)

The Undervoltage shutdown threshold of the TPS62113 device is precisely programmable by the user, thanks to its improved LBI capabilities. There is no requirement for a separate supply voltage supervisor (SVS) to carry out this task. When the EN pin is pulled high, the LBI comparator solely uses the internal bandgap voltage reference. As long as the LBI voltage is below the LBI trip point, the remaining internal circuits are disabled, and the supply current is reduced to 10 A. The device is fully activated and begins switching as soon as the input voltage at LBI exceeds 1.256 V, which is the LBI trip point. The TPS62110 and TPS62113 are identical other from one feature.

● Synchronization

The average switching frequency of the converter is 1 MHz when no clock signal is applied. The converter can be synchronized to an external clock from 0.8 to 1.4 MHz. As soon as the device senses the rising edge of the first clock, it begins synchronizing with the external clock. If the converter loses its external clock signal, it will immediately revert to using its internal clock to keep working. The transition is made if the SYNC pin does not see a rising edge for four clock cycles. As a result, if the internal clock is set to its lowest possible frequency of 800 kHz, the maximum delay time is 6.25 s. Power saving mode is not activated, and devices remain in forced PWM mode if they are time-synchronized to an external clock. Connect the SYNC pin to the GND pin to activate the power-saving mode. It maintains excellent efficiency across a broad load current range, and the converter switches between the PWM and PFM modes depending on the load intensity.

Conclusion

The input power source for the TPS6211x devices is not particularly picky. The source voltage, output voltage, and output current of the TPS6211x devices dictate the rating required for the input power supply’s output current.

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