TPS563200DDCR IC

Technical Specifications of TPS563200DDCR

Datasheet	TPS563200DDCR datasheet
Category	Integrated Circuits (ICs)
Family	PMIC – Voltage Regulators – DC DC Switching Regulators
Manufacturer	Texas Instruments
Series	D-CAP2?, Eco-Mode?
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)	4.5V
Voltage – Input (Max)	17V
Voltage – Output (Min/Fixed)	0.76V
Voltage – Output (Max)	7V
Current – Output	3A
Frequency – Switching	650kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	SOT-23-6 Thin, TSOT-23-6
Supplier Device Package	SOT-6

TPS563200DDCR Description

The TPS562200 and TPS563200 are 6-pin SOT-23 synchronous step-down (buck) converters with 2 A and 3 A, respectively, of output current. The devices have been fine-tuned so that they need as few external parts as possible and use as little power as possible when not used.

These SMPS units use D-CAP2 mode control, which allows for a fast-transient response and works with low equivalent series resistance (ESR) output capacitors, capacitors made of ultra-low ESR polymer and ultra-low ESR ceramics, without the need for external compensating components. The TPS562200 and TPS563200 can run in Advanced Eco-mode, making them very efficient even when they aren’t used much. The devices are made to work between -40 degrees Celsius and 85 degrees Celsius, and they come in a 6-pin, 1.6-by-2.9-millimeter SOT (DDC) package.

TPS563200DDCR Features

• TPS562200 is a 2A converter with 122 m and 72 m FETs built in.
• TPS563200 is a 3A converter with 68 m and 39 m FETs built in.
• D-CAP2™ Mode Control for Fast Transient Response.
• The range of input voltage is 4.5 V to 17 V.
• Output Voltage Range: 0.76 V to 7 V.
• The switching frequency is 650 kHz.
• Advanced Eco-mode™ Pulse-skip.
• Less than 10 A of current when turned off.
• 1% Accuracy in Voltage Feedback (at 25°C).
• Startup from Output Voltage Already Biased.
• Cycle-By-Cycle Overcurrent Limit.
• Undervoltage protection in hiccup mode.
• Protections for OVP, UVLO, and TSD that don’t latch.

Applications

• Digital TV Power Supply
• Networking Home Terminal

Detailed Description

Synchronous step-down converters can handle currents of 2 Amps (APS562200) and 3 Amps (TPS563200). When used with low ESR output capacitors like specialty polymer and multi-layer ceramic capacitors, patented DCAP2TMmode control eliminates the need for complicated external compensation circuitry. The fast-transient response of D-CAP2TM mode control can reduce the amount of output capacitance needed to reach a certain level of performance.

Feature Description

● The Adaptive On-Time Control and PWM Operation

The TPS562200 and TPS563200 have an adaptive on-time pulse width modulation (PWM) controller in the primary control loop. This allows them to work in a D-CAP2TM mode, which is a patented technology. With a low ESR ceramic output capacitor and an internal compensation circuit, the D-CAP2TM mode control achieves a pseudo-fixed frequency with minimal external components. Even though there is almost no ripple in the output, it is still stable. The high-side MOSFET is turned on at the start of each cycle. When the timer inside this MOSFET runs out, it turns off.

This one-shot time is set to be inversely proportional to the input voltage of the converter (VIN) and proportional to the output voltage (VO) to keep a “pseudo-fixed” frequency over a range of input voltages. This is called “adaptive on-time control.” When the feedback voltage drops below the reference voltage, the one-shot timer is reset after turning on the high-side MOSFET again. The output ripple is simulated by adding an internal ramp to the reference voltage. This eliminates the need for ESR-induced output ripple from D-CAP2TM mode control.

● Advanced Eco-Mode™ Control

Advanced Eco-modeTM is built into the TPS562200 and TPS563200 to maintain high light load efficiency. When there is a heavy load, the output and inductor currents go down. Eventually, the rippled valley of the inductor current touches zero, which is the line between continuous and discontinuous conduction. When the zero-inductor current is found, the MOSFET that reverses is turned off.

As the load current goes down even more, the converter enters a mode called “intermittent conduction.” The ontime is almost the same as in the continuous conduction mode. This makes it take longer for a smaller load current to drain the output capacitor to the reference voltage level. This lowers the switching frequency related to the load current and keeps the efficiency high when the load is low.

● Soft Start and Pre-Biased Soft Start

Both the TPS562200 and the TPS563200 have a 1 ms soft-start built in. When the EN pin goes high, the internal soft-start function slowly raises the reference voltage to the PWM comparator. If the output capacitor is already charged when the device starts up, the internal reference voltage will not switch until the feedback voltage VFB is higher than the internal reference voltage. This plan makes sure that the converters smoothly reach their regulation point.

● Current Protection

It employs a control circuit with a valley detector on each cycle (OCL) to set the output overcurrent limit. In the OFF position, the drain-to-source voltage of the low-side FET is used to measure how much current is going through the switch. In other words, the switching current has an effect on the voltage. The temperature has been changed to improve the accuracy of the voltage sensing. The linear increase in switch current depends on VIN, VOUT, the high-side FET switch’s on-time, and the output inductor’s value. When the low-side FET switch is “on,” this current steadily decreases.

The average value of the switch current is equal to the load current IOUT. If the measured current is higher than the OCL level, the converter will keep the low-side FET on and put off, making a new set pulse, even if the voltage feedback loop needs one. The on-time is then set to the value wanted for the next switching cycle, and the current is measured continuously. If an overcurrent condition lasts for over one switching cycle, the internal OCL threshold will be lowered. This will cause the maximum output current to drop. When a switching cycle happens where the switch current is not higher than the upper OCL threshold, the counter and OCL threshold are reset. A few things must be considered when implementing this kind of over-current protection.

The load current is half the peak-to-peak inductor ripple current higher than the over-current threshold. Limiting current also causes the output voltage to drop because the load current may be higher than what the converter can handle. Because of this, the output voltage may drop. When the VFB voltage drops below the threshold value, the UVP comparator will notice. After a time equal to the UVP delay time, usually 14 s, the device turns off and reboots itself (typically 12 ms).

● Over Voltage Protection

By monitoring the feedback voltage, the TPS562200, and TPS563200 can tell if there is an overvoltage situation (VFB). When the feedback voltage exceeds 125% of the setpoint, the OVP comparator’s output goes high, cutting power to both the high-side and low-side MOSFET drivers. This does not involve latching.

Device Functional Modes

● Normal Operation

When the input voltage is higher than the UVLO threshold and the EN voltage is higher than the enable threshold, the TPS562200 and TPS563200 can switch normally. When the switch current is at least 1 A, the device goes into a normal mode of continuous conduction (CCM). When used in CCM, the TPS562200, and the TPS563200 work at a fixed or nearly fixed frequency of 650 kHz.

● Eco-Mode Operation

TPS562200 and TPS563200 enter pulse-skipping eco-mode when the switch current drops to 0 A in conventional CCM mode. To save power, the system sleeps after switching. Sleep terminates when VFB voltage lowers to eco-mode threshold voltage. Output current decreases switching pulse duration.

● Standby Operation

When the TPS562200 and TPS563200 run in either standard CCM or eco-mode, you can put them to sleep by pulling the EN pin low.

Conclusion

In the end, the Texas Instruments TPS563200DDCR DC to DC converter is a great choice for controlling the power in your circuit. This converter is good at managing power because it has a single output that can produce up to 3 A and an output voltage that can be changed from 0.76 V to 7 V. It can work with a low input voltage of 4.5 V and a high input voltage of 17 V, so it can be used with a wide range of devices. The high 650(Max) kHz switching frequency ensures the converter works smoothly.

The part is wrapped in tape and reel packaging during shipping to ensure it arrives safely and can be put together quickly. Since it can work from -40°C to 85°C, it can be used in many different places. Contact ICRFQ, the best electronic distributor in China, to order or learn more about this great converter. With the TPS563200DDCR DC-to-DC converter and other high-quality parts, you can take your designs to the next level and get the best performance.

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