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Once exception to this is the output switch pin, which should not have large areas of copper. An enable function, an over current protection function and a short circuit protection function are built inside.
Drive EN pin high to turn on tr1410 regulator, drive it low to turn it off.
The device includes a voltage reference, oscillation circuit, error amplifier, internal PMOS and etc. An internal compensation block is built in to minimize external component count. Furthermore, some of these components such as the catch diode will add heat to the PC board and the heat can vary as the input voltage hd1410.
Parameters Symbol Test Condition Min. The data for td14100 curves was taken with the TD SOP8 package operating as a buck-switching regulator in an ambient temperature of 25oC still air. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not implied.
EN is a digital input that tv1410 the regulator on or off. The size of the heat sink depends on the input voltage, the output voltage, the load current and the ambient temperature. As in any switching regulator, layout is very important.
If open core inductors are used, special care must be taken as to the location and positioning of this type of inductor.
It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. Other factors are, trace width, total printed circuit copper area, copper thickness, single or double-sided, multi-layer board and the amount of solder on the board.
For the inductor, depending on the physical size, type of core material and the DC resistance, it could either act as a heat sink taking heat away from the board, or it could add heat to the board.
This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into TD Package thermal resistance and junction temperature rise numbers are all approximate, and there are many factors that will affect these numbers.
SW is the switch node that supplies power to the output. Power Switch Output Pin. The effectiveness of the PC board to dissipate heat also depends on the size, quantity and spacing gd1410 other components on the board, as well as whether the surrounding air is still or moving.
Icc vs Temperature Figure 8. To minimize coupling to sensitive circuitry, the PC board copper area connected to this pin should be kept a minimum.
Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 30uA. The voltage spikes are tc1410 because of the fast switching action of the output switch, and the parasitic inductance of the output filter capacitor, To minimize these voltage spikes, special low inductance capacitors can be used, and their lead lengths must be kept short.
For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper should be used in the board layout.
EN Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 30uA.
Large areas of copper provide the best transfer of heat lower thermal resistance gd1410 the surrounding air, and moving air lowers the thermal resistance even further.
Higher ambient temperatures require more heat sinking. The output ripple voltage is due mainly to the inductor sawtooth ripple current multiplied by the ESR of the output capacitor. An additional small LC filter can be added to the output as shown in Figure 14 to further reduce the amount of output ripple and transients. Stresses greater than those listed under Maximum Ratings may cause permanent damage to the device.
Datasheet 2A KHZ 20V PWM Buck DC/DC
A suitable input td1401 capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator.
Vendor Web Site 1 Diodes,Inc. Bypass Vin to GND with a suitably large capacitorto eliminate noise on the input. Some tdd1410 these factors include board size, shape, thickness, position, location, and even board temperature. When using the adjustable version, special care must be taken as to the location of the feedback resistors and the associated wiring. Physically locate both resistors near the IC, and route the wiring away form the inductor especially an open core type of inductor.
A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator GND Circuit hd1410.