Summary of 36V OPERATION, COIL-INTEGRATED STEP-DOWN DC/DC CONVERTERS
Torex Semiconductor introduced the XDL605/XDL606 series, AEC-Q100 compliant micro DC/DC converters integrating a coil and control IC. These ultra-small devices (2.5 x 3.6 x 1.55mm) simplify circuit design by requiring only external ceramic capacitors and resistors for voltage setting. They support input voltages from 3.0V to 36V, offer selectable PWM or PWM/PFM control modes, and feature adjustable soft-start and power good functions to minimize board space and radiation noise.
Parts used in the XDL605/XDL606 Project:
- XDL605/XDL606 step-down micro DC/DC converter
- Ceramic capacitor
- External resistance for voltage setting
- Resistor and capacitor for EN/SS pin configuration
Torex Semiconductor Ltd. has launched the XDL605/XDL606 series of AEC-Q100 compliant, ultra-small step-down “micro DC/DC” converters which have an integrated coil and control IC.
A DC/DC converter power supply circuit can be constructed simply by adding a ceramic capacitor and a resistance for voltage setting to the external components, which can contribute to substantially reducing space requirements for board areas and shortening development periods. Also, the internal incorporation of the coil simplifies board layout, making it possible to minimize radiation noise and problems with circuit operation.
An input voltage of 3.0V to 36V (absolute maximum ratings 40V) with a switching frequency of 2.2MHz, 0.75V standard voltage supply are built-in, and the output voltage can be set from 1.8V to 5.0V with an external resistance. The control system can be selected from PWM control (XDL605) or PWM/PFM automatic switching control (XDL606).
The soft-start time has been internally set to 2.0ms (TYP.), but can be optionally set to any desired value by connecting a resistance and capacity to the EN/SS pin, and the power good function makes it possible to monitor the status of the output voltage. Sequence control can be performed with a combination of the softstart time and power good function.
The coil and control IC are encapsulated in a DFN3625-11B ultra-small leadless package (outside dimensions: 2.5 x 3.6 x h1.55mm) (Figure 1), making these products among the world’s smallest class of coilintegrated DC/DCs compliant with AEC-Q100.
Read more: 36V OPERATION, COIL-INTEGRATED STEP-DOWN DC/DC CONVERTERS
- What is the input voltage range of the XDL605/XDL606?
The input voltage ranges from 3.0V to 36V with absolute maximum ratings of 40V. - How can the output voltage be set?
The output voltage can be set from 1.8V to 5.0V using an external resistance. - Can I select different control systems for these converters?
Yes, users can choose between PWM control for the XDL605 or PWM/PFM automatic switching control for the XDL606. - Is the soft-start time fixed internally?
The internal soft-start time is typically 2.0ms but can be optionally set to any desired value via the EN/SS pin. - What package size do these converters use?
They are encapsulated in a DFN3625-11B ultra-small leadless package measuring 2.5 x 3.6 x h1.55mm. - Does the device have a function to monitor output status?
Yes, it includes a power good function that allows monitoring of the output voltage status. - How does the integrated coil benefit the circuit layout?
Internal incorporation of the coil simplifies board layout and helps minimize radiation noise and circuit operation problems. - What is the switching frequency of these converters?
The switching frequency is built-in at 2.2MHz.
