TPSM5601R5SRDAR IC

TPSM5601R5SRDAR Description

With its 60-V input step-down DC/DC converter, power MOSFETs, a shielded inductor, and passives all combined within a thermally improved QFN package, the TPSM5601R5 power module provides a 1.5-A power solution. The 15-pin QFN package is 5 millimeters by 5.5 millimeters by 4 millimeters and uses Enhanced HotRod QFN technology to improve thermal performance, minimize footprint, and reduce electromagnetic interference. For ease of planning and handling during production, the package footprint only comprises one large thermal pad, and all pins are accessible from the outside.

The TPSM5601R5 is an adjustable power module with a wide output voltage range from 1.0 V to 6 V that is both small and simple to use. The system needs as few as four external components, and tedious design tasks like loop correction and magnetics part selection are unnecessary. The TPSM5601R5 is a fantastic device for powering various applications thanks to its complete feature set, consisting of power good, overcurrent, programmable UVLO, and temperature precautions. The 5.0 mm 5.5 mm packaging is ideal for use when there is a lack of available space. The TPSM5601R5S is capable of frequency spread-spectrum operation, too.

TPSM5601R5SRDAR Features

● Quiescent current of 26 A without switching.

● Pre-biased output after monotonic startup.

● Neither Bootstrap nor loop compensation is present.

● Hysteresis-assisted precision UVLO input and enable.

● Hysteresis-assisted thermal shutdown protection

● Utilizing the TPSM5601R5 and WEBENCH® Power Designer, produce a unique design.

Detailed Description

Using a source voltage between 4.2 V and 60 V, the TPSM5601R5 converter is a synchronous buck DC-DC power module that is simple to install and use. The device supports step-down conversions from 5, 12, 24, semi-regulated, and 48-volt supply rails. The TPSM5601R5’s great efficiency, ultra-low input quiescent current, and small solution size result from its inductor, integrated power controller, and MOSFETs, which allow it to supply currents of up to 1.5 A DC at very high efficiency.

Even though it was made to be easily implemented, this tool can be customized for maximum performance in any given scenario. The lack of a need for control-loop compensation shortens the development cycle and reduces the number of extra parts. The TPSM5601R5 includes several advanced capabilities to meet the most demanding system specifications, such as:

● Open-drain power-good circuit for sequencing the power rails and reporting faults.

● Starting monotonically with pre-biased loads.

● Line Undervoltage lockout with configurable hysteresis and precision enable (UVLO).

● Automatic thermal and overcurrent shutdown recovery.

The TPSM5601R5S can also function in a frequency spread-spectrum mode. These capabilities allow for an adaptable and user-friendly platform that may be used for many purposes. The pin configuration was made with the ease of PCB design, allowing for using as few as four additional components.

● Minimum Input Capacitance

If you’re using a TPSM5601R5, your input capacitor must be at least 9.4 F (2 4.7 F) and be made of ceramic. Using X5R or X7R ceramic capacitors of high quality and a high voltage rating is important. Capacitors for input should be connected between the device’s VIN and PGND, as shown in Section 11.1. Adding extra bulk capacitance to the input is also useful for applications that handle transient loads.

● Undervoltage Lockout (UVLO), Precision Enable (EN), and Hysteresis (HYS)

The TPSM5601R5’s precision ON/OFF control is accessible via the EN pin. When the voltage on the EN pin rises above a certain point, the device turns on. Connecting EN to VIN is the quickest and easiest approach to activate the gadget. The gadget can power on and function when VIN is within the allowed parameters. The output can be turned on and off, and the system is sequenced and protected with an external logic signal driven through the EN input. This input cannot be left unconstrained. Undervoltage lockout (UVLO) circuitry is built inside the TPSM5601R5 and accessible through the VIN input

500 mV is the typical hysteresis for an internal VIN UVLO rising threshold, and the threshold voltage is 3.8 V. Adjustable UVLO is possible via the EN input by connecting a resistor divider between VIN and the EN pin, should an application necessitate a higher UVLO threshold. If a voltage is applied to the device more than or equal to 1.14 V, the device will enter Standby mode and supply power to the internal LDO. The device can enter Start-up mode and begin the soft-start period by increasing the EN voltage to 1.231 V (typical).

The regulator powers down and enters Standby mode when the EN input is lowered to 1.121 V (110 mV hysteresis). If the EN voltage is reduced to below 0.3 V, the gadget will turn off permanently. Using a reference-based soft start, the TPSM5601R5 can eliminate output voltage overshoots and excessive inrush currents during the startup of the regulator. The output voltage takes around 4 ms to begin to climb.

● Power Good (PGOOD)

On the TPSM5601R5, PGOOD denotes output voltage regulation. Use PGOOD for downstream converter start-up sequencing, output monitoring, and fault protection. To a DC supply below 18 V, an open-drain output like PGOOD requires a pullup resistor. V5V or VOUT is the pullup voltage. The usual resistance for pullups is 10–100 k. If necessary, reduce the pullup rail voltage using a resistor divider. Grind the PGOOD pin when not in use.

The internal PGOOD switch disables itself when the output voltage rises above 95% or falls below 105% of the setpoint, allowing the external pull-up to pull PGOOD high. If the FB voltage drops below 93% or rises above 107% of the setpoint, PGOOD is pushed down. About 4 ms after EN is asserted during the initial power-up, the power-good flag becomes high. This lag only appears at startup.

● Spread Spectrum Operation

With TPSM5601R5S, a spread spectrum is included. To reduce peak emissions at specific frequencies, spread spectrum components disperse emissions over a wider frequency range than fixed frequency components. Most systems easily filter low-frequency transmitted emissions from the first few switching frequency harmonics.

A more difficult design criterion is to reduce greater harmonic emissions in the FM band. Harmonics are coupled to the environment through electric fields around the switch node. The triangular spread spectrum device TPSM5601R5S has a typical spreading rate of 4% and a modulation rate of 16 kHz (typical). The internal clock can only use the spread spectrum when operating at its natural frequency. These circumstances render the spread spectrum useless:

When the device is operating at a minimum on time and has a high input voltage/low output voltage ratio, the internal clock is retarded, deactivating the spread spectrum.

Dropout causes a slowdown in the clock.

● Overcurrent Protection (OCP)

The TPSM5601R5 protects against overcurrent using cycle-by-cycle current limiting and Hiccup mode. The current limit threshold is checked throughout each switching cycle. Under overcurrent, output voltage declines.

Conclusion

The TPSM5601R5 operates from 4.2 V to 60 V. This input source must offer maximum input current and keep a voltage above UVLO. Ensure the input supply rail resistance is low enough to prevent an input current transient from causing a high enough drop at the TPSM5601R5 supply rail to trigger a UVLO fault and system reset. If the input supply is more than a few inches from the TPSM5601R5, bulk capacitance may be needed in addition to ceramic input capacitance. The capacitor ESR dampens input filter resonances in a 47-μF electrolytic capacitor. Most input circuit setups require 0.5 ESR dampening.

If you need additional information or wish to order TPSM5601R5SRDAR, 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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