TPS54560DDAR IC

Technical Specifications of TPS54560DDAR

Datasheet	TPS54560DDAR datasheet
Category	Integrated Circuits (ICs)
Family	PMIC – Voltage Regulators – DC DC Switching Regulators
Manufacturer	Texas Instruments
Series	Eco-Mode?
Packaging	Tape & Reel (TR)
Part Status	Active
Function	Step-Down
Output Configuration	Positive
Topology	Buck, Split Rail
Output Type	Adjustable
Number of Outputs	1
Voltage – Input (Min)	4.5V
Voltage – Input (Max)	60V
Voltage – Output (Min/Fixed)	0.8V
Voltage – Output (Max)	58.8V
Current – Output	5A
Frequency – Switching	100kHz ~ 2.5MHz
Synchronous Rectifier	No
Operating Temperature	-40°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	8-PowerSOIC (0.154″, 3.90mm Width)
Supplier Device Package	8-SO PowerPad

TPS54560DDAR Introduction

The TPS54560 is a 60 V, 5 A, step-down regulator with an integrated high-side MOSFET. According to ISO 7637, the device can withstand load dump pulses of up to 65V. Current mode control gives straightforward external compensation and customizable component selection. The no-load supply current is reduced to 146 A in a low ripple pulse skip mode. When the enable pin is pushed low, the shutdown supply current is lowered to 2 A.

Undervoltage lockout’s internal setting is 4.3 V; however, it can be raised by connecting an enable pin. Internal controls are used to ramp up the output voltage to offer a regulated start-up and prevent overshoot.

Optimizing efficiency or external component size with a large switching frequency range is possible. An output current restriction is applied cycle after cycle. Thermal shutdown and frequency foldback protect internal and external components during an overload state.

The 8-terminal thermally improved HSOP PowerPADTM package for the TPS54560 is available.

TPS54560DDAR Features

• High Efficiency with Pulse Skipping Eco-modeTM at Light Loads.
• High-Side MOSFET, 92 m.
• 2 A for shutdown current and 146 A for operating quiescence.
• Fixed Switching Frequency: 100 kHz to 2.5 MHz.
• synchronizes with an outside clock.
• Low Dropout with Integrated BOOT Recharge FET at Light Loads.
• UVLO Voltage and Hysteresis Adjustable.
• Internal Voltage Reference of 0.8 V at 1%.
• HSOP with 8 terminals and PowerPADTM package.
• –40°C to 150°C T_JOperating Range

TPS54560DDAR Detailed Description

The TPS54560 is a high-side n-channel MOSFET integrated 60 V, 5 A step-down (buck) regulator. The gadget uses current mode control with constant frequency to lower output capacitance, making external frequency adjustment easier. When choosing the output filter components, the broad switching frequency range of 100 kHz to 2500 kHz enables either efficiency or size optimization. An RT/CLK terminal-connected resistor to the ground changes the switching frequency.

The power switch will turn on in sync with the falling edge of an external clock signal thanks to the device’s internal phase-locked loop (PLL), which is attached to the RT/CLK connector. About 4.3 V is the default input start-up voltage for the TPS54560; with the aid of two external resistors, the EN terminal can be utilized to modify the input voltage undervoltage lockout (UVLO) threshold. The operation is possible even while the EN terminal is floating, thanks to an inbuilt pull-up current source. The operational current (not switching) is 146 A when there is no load. The supply current is 2 A when the gadget is off. The inbuilt 92m high side MOSFET offers high-efficiency power supply systems that serve a load with a constant 5 amps current.

Integrated high-side MOSFET gate drive bias voltage is provided via a bootstrap capacitor between the BOOT and SW terminals. The TPS54560 lowers the number of external components by including the bootstrap recharge diode. A UVLO circuit keeps track of the voltage at the BOOT terminal capacitor and disables the high-side MOSFET when it drops below a predetermined level. The TPS54560 can function at high-duty cycles close to 100% thanks to a circuit that recharges the BOOT capacitor. Since the application’s minimum input supply voltage is close to its maximum output voltage, this is the case.

Integrated high-side MOSFET gate drive bias voltage is provided via a bootstrap capacitor between the BOOT and SW terminals. The TPS54560 lowers the number of external components by including the bootstrap recharge diode. A UVLO circuit keeps track of the voltage at the BOOT terminal capacitor and disables the high-side MOSFET when it drops below a predetermined level. The TPS54560 can function at high-duty cycles close to 100% thanks to a circuit that recharges the BOOT capacitor. Since the application’s minimum input supply voltage is close to its maximum output voltage, this is the case.

When the overload condition is eliminated, the soft-start circuit regulates the recovery from the fault output level to the nominal regulation voltage. In order to keep the inductor current under control during startup and overcurrent fault situations, a frequency foldback circuit lowers the switching frequency.

TPS54560DDAR Feature Description

● Fixed Frequency PWM Control

With adjustable switching frequency, the TPS54560 utilizes fixed frequency, peak current mode control. An error amplifier uses external resistors attached to the FB terminal to compare the output voltage to an internal voltage reference. The high-side power switch turns on due to an internal oscillator. The high side power switch current is managed by the output of the error amplifier at the COMP terminal.

The power switch is turned off when the high-side MOSFET switch current approaches the threshold value established by the COMP voltage. As the output current increases and decreases, so does the voltage at the COMP terminal. The device limits current flow by clamping the COMP terminal voltage to a maximum value. A minimum voltage clamp implements the pulse-skipping Eco-mode on the COMP terminal.

● Slope Compensation Output Current

The MOSFET switch current sense signal is given a compensatory ramp by the TPS54560. Subharmonic oscillations are avoided at duty cycles greater than 50%, thanks to this slope adjustment. The high side switch’s peak current limit is unaffected by slope compensation and remains constant throughout the entire duty cycle range.

● Pulse Skip Eco-mode

The TPS54560 runs in a pulse-skipping Eco-mode at low load currents to increase efficiency by lowering switching and gate drive losses. If the output voltage is below the pulse skipping current threshold and the peak switch current after any switching cycle and the regulatory restrictions are met, the device enters Eco mode.

The pulse-skipping current threshold is the peak switch current level corresponding to a 600 mV nominal COMP voltage. The high-side MOSFET is disabled, and the COMP terminal voltage is clamped at 600 mV while the device is in Eco mode.

The output voltage starts to deteriorate because the device is not switching. The voltage control loop raises the COMP terminal voltage in response to the output voltage’s decline. When the error amplifier raises COMP above the pulse-skipping threshold, the high-side MOSFET is activated, and switching is resumed. When COMP eventually falls below the pulse skipping threshold for Eco-mode, the output voltage recovers to its regulated value, and the device once more enters Eco-mode. When in Eco-mode, the internal PLL is still functional. Switching transitions occur in sync with the external clock signal when Eco-mode is used at low load currents.

The TPS54560 measures and regulates peak switch current during Eco-mode operation, not average load current. The output inductor value so affects the load current at which the gadget switches to Eco mode.

Conclusion

For high-performance step-down regulation in automotive and industrial applications, the TPS54560 is a great option. Its characteristics, such as a wide switching frequency range, pulse skipping Eco-mode, and configurable compensation and component selection, make it a versatile and dependable option for various power supply demands. The TPS54560 is a top choice for engineers and designers searching for a high-performance regulator because of its capacity to tolerate load dump pulses of up to 65V and function in tough settings. Don’t wait any longer to experience the benefits of the TPS54560 – contact ICRFQ today to learn more and order yours!

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