TLV62568PDRLR

Voltage - Input (Max):	5.5V
Supplier Device Package:	SOT-563-6
Package / Case:	SOT-563, SOT-666
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	1.5MHz
Current - Output:	1A
Voltage - Output (Max):	5.5V
Voltage - Output (Min/Fixed):	0.6V
Series:	--
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TLV62568PDRLR is a DC/DC synchronous-rectified step-down switching regulator (DC/DC buck regulator) of Texas Instruments’ 18-VIN PowerPAD™ family. This regulated switch-mode DC/DC converter offers a current rating of up to 5.5A and a switching frequency of up to 1MHz, delivering high efficiency and a wide input voltage range from 4.5 V to 17 V.The TLV62568PDRLR uses a synchronous rectification architecture for ultra-low voltage drop and high efficiency. It has an internally programmed-under-voltage-lock-out (UVLO) and can operate with a minimum start voltage of 4.5 V. On-chip error amplification and active output discharge circuits enable the TLV62568PDRLR to maintain high accuracy and fast transient responses with only few external components. The TLV62568PDRLR features various protection functions such as adjustable current limiting, thermal shutdown, and cycle-by-cycle over-current protection. Its adjustable switching frequency allows designers who need to meet EMC standards to adjust the switching frequency, allowing them to minimize external components when designing WLED/flash and USB power supply applications.TLV62568PDRLR Application fieldThe TLV62568PDRLR DC/DC synchronous-rectified step-down switching regulator is suitable for a wide range of applications. These include a variety of consumer electronics and portable computing devices such as tablets, PCs, and smartphones. It is also suitable for powering LED backlights, cameras, GPS and other portable devices where a low noise, high efficiency DC/DC buck converter is necessary.TLV62568PDRLR Working PrincipleThe TLV62568PDRLR is a synchronous-rectified step-down DC/DC buck converter. It operates in voltage mode control, which means it regulates its output voltage according to a specific reference voltage. This reference voltage is set by the external resistor divider connected between the VREF and GND pins. The TLV62568PDRLR then monitors the output voltage and adjusts the duty cycle of the power switch to maintain the output voltage as close to the desired reference as possible.The power switch is controlled by the output of the PWM comparator, which compares the feedback voltage with a triangular waveform generated by the internal oscillator. When the feedback voltage exceeds the triangular waveform, the output of the comparator goes high thereby turning on the power switch. When the feedback voltage drops below the triangular waveform, the output of the comparator goes low, turning off the power switch.The TLV62568PDRLR also uses synchronous rectification, which employs high-side and low-side MOSFETs to provide rectification instead of the traditional Schottky diode rectifier. This improves efficiency by eliminating the diode\'s voltage drop, and reduces power dissipation for a given output current. TLV62568PDRLR provides pull-down current on the EN pin to ensure the DC/DC converter enters standby mode when the EN pin is high. An adjustable over-current limit circuit is also provided, to limit the switch current in case of an overload condition. The TLV62568PDRLR also features a built-in thermal shut-down circuit, which shuts down the converter when the junction temperature exceeds 155°C.In summary, the TLV62568PDRLR DC/DC synchronous-rectified step-down switching regulator is a simple, efficient and highly integrated device for a variety of applications. Its integrated synchronous rectifier, adjustable current limiting, and thermal protection provide a reliable and cost-effective solution for powering various portable electronic devices. Its wide input voltage range, low dropout voltage, and high efficiency also make it ideal for a number of power-constrained applications.

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