Part Number: TPSM53604RDAR

Manufacturer: Texas Instruments

Description: DC-DC CONVERTER 1-7V

Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

TPSM53604RDAR Description

The power module TPSM53604 is a highly integrated 4-A power solution that incorporates a step-down, an inverter, and a transformer.  DC/DC converter with power MOSFETs, a shielded inductor, and passives in a thermally improved QFN packaging. The converter accepts an input voltage of 36 volts and steps it down to a lower voltage. Enhanced HotRod QFN technology is utilized in the 15-pin package, measuring 5 millimetres by 5.5 millimetres by 4 millimetres. This results in increased thermal performance, a small footprint, and minimal electromagnetic interference. The footprint of the package includes one huge thermal pad, and all pins are accessible from the exterior. This makes the layout simple and easier to handle throughout the production process.

The overall method can be implemented with as few as four external components and does away with the need for loop compensation and the selection of magnetic components during the design phase. The comprehensive feature set of the TPSM53604, which includes protections against overcurrent, overtemperature, overcurrent, and pre-bias start-up, makes it a suitable device for powering a wide variety of applications. Other protections include programmable UVLO.

TPSM53604RDAR Features

  • Range of input voltage: 3.8 to 36 V.
  • The range of the output voltage is 1 to 7 V.
  • 95% efficiency maximum.
  • Power-good symbol
  • Precision facilitates.
  • Built-in UVLO, start-up into pre-bias output, hiccup-mode short-circuit protection, overtemperature protection, and soft start.
  • Range of the operating IC junction: -40 to +125 °C.
  • Temperature range for operation: -40 to +105.
  • Mil-STD-883D shock and vibration testing.
  • 2-A TPSM53602 and 3-A TPSM53603 are pin compatible.
  • Using the WEBENCH® Power Designer and the TPSM53604, create a unique design.
  • For quick board design, download the EVM Design Files.

Detailed Description


The TPSM53604 is a full-featured, 36-V input, 4-A, synchronous step-down converter that is built into a low-profile, over-moulded package. It has PWM, MOSFETs, a shielded inductor, and control circuitry in one convenient location. The integration of the device makes it possible to create compact designs while also offering the capability to adjust to important parameters to fulfil particular design needs. The TPSM53604 offers an output voltage range that is anywhere from 1 V to 7 V. For the purpose of achieving the necessary level of output voltage, an external resistor divider is utilized. The device can deliver accurate voltage regulation over a wide range of load conditions by utilising a precision internal voltage reference.

Internally, the input Undervoltage lockout is preset to 3.55 V (typical), but it can be increased by using a resistor divider connected to the EN pin of the device. To put the device into standby mode and lower the amount of current drawn from the input, the EN pin can also be pulled low. When the output voltage is within the range considered to be the nominal value, a power-good signal is sent out. During an overload state, the device is protected by characteristics such as its thermal shutdown and current limit. In applications with limited space, a thermally improved solution can be provided in the form of a 15-pin QFN package with exposed bottom pads.

Switching Frequency

Internally to the device, the switching frequency of the TPSM53604 has been programmed to operate at 1.4 MHz. There is no provision for adjusting the switching frequency. In situations where the load current is sufficiently strong and the device is functioning in PWM mode, the device runs at a constant frequency. The switching frequency is lowered, which leads to a decrease in the amount of power wasted due to the device switching to PFM mode as the load current decreases.

Input Capacitors

A minimum input capacitance of 20 pF (2 x 10 pF) of ceramic type is necessary for the TPSM53604 to function properly. It is recommended to use capacitors of type X5R or X7R that are ceramic and of high quality. The voltage rating should also be enough. When it comes to applications needing transient loads, TI suggests adding an additional 47 F of capacitance that is not ceramic. The highest voltage that can be applied to the inputs requires that the input capacitors have a higher voltage rating than that.

Programmable Undervoltage Lockout (UVLO)

On the VIN pin, the TPSM53604 includes an internal UVLO circuitry implementation. When the voltage at the VIN pin drops below the predetermined level for the internal VIN UVLO, the device is disabled. The rising threshold for the internal VIN UVLO is typically 3.55 volts, and the normal hysteresis voltage is 500 millivolts.

Power Good (PGOOD)

A power-good signal, abbreviated as PGOOD, is incorporated into the TPSM53604 and indicates whether or not the output voltage is within the regulation range. Because it is an open-drain output, the PGOOD pin needs to be connected through a pullup resistor to a nominal voltage source lower than 18 V. The pull-up voltage source can be derived from the internal 5-V LDO output located on the V5V pin. The value of a pull-up resistor is typically somewhere in the range of 10 k to 100 k. The maximum sink current advised for use with PGOOD is 3 mA.

Light Load Operation

When there is a light load on the circuit, the component activates the high-side MOSFET and waits until the current through the inductor reaches a controlled minimum value of about one ampere. The period necessary to reach these minimum currents extends further into the future as the input voltage continues to drop, reducing the voltage headroom between VIN and VOUT. During this time, more energy travels from the VIN to the VOUT terminals, resulting in a higher output voltage ripple.

It is necessary to employ the EN UVLO function in order to keep at least 1 V of headroom above the VOUT output to get rid of this behaviour. Alternately, more output capacitance can be added to the circuit to lessen the output voltage ripple in applications that run with light loads and have very little headroom between the VIN and VOUT voltages.

Voltage Dropout

The difference in voltage that occurs between the input voltage and the output voltage in order to maintain output voltage regulation while providing the rated output current is referred to as the voltage dropout. The TPSM53604 must have a minimum VIN of 3.8 V or (VOUT + 1 V), whichever value is higher, to guarantee that the output voltage will remain regulated throughout the whole operating temperature range. When the dropout voltage is lower than the guideline given above, the TPSM53604 switches into a mode known as frequency foldback operation. The switching frequency is lowered by frequency foldback, which makes it possible for the output voltage to keep regulation even while the input voltage drops.

Device Functional Modes

Active Mode

When the voltage at the VIN pin is greater than the turn-on threshold and the voltage at the EN pin is more than the EN high threshold, the TPSM53604 operates in the active mode. The TPSM53604 can be enabled most straightforwardly by connecting the EN pin to the VIN pin. When the input voltage is within the operational range of 3.8 V to 36 V, the TPSM53604 can start independently, thanks to this feature. To postpone the switch on of the UVLO until VIN is closer to its regulated voltage, you can alter it by connecting a resistor divider between VIN, EN, and AGND.


If you need additional information or wish to order TPSM53604RDAR, 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.

4.8/5 - (397 votes)
Kevin Chen