PQ025EZ01Z データシートの表示（PDF） - Sharp Electronics

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PQ025EZ01Z

DEVICE SPECIFICATION FOR VOLTAGE REGULATOR

Sharp Electronics 

SHARP CORPORfiTION

7. Notes

7.1 External connection

C-MOS or TIL

(1) Please perform shortest wiring for connection between Cm, Co and the

individual terminal. There is case that oscillation occurs easily by kinds

of capacitor and capacity. Before you use this device, you should confirm

output voltage on your use mounting state.

(2) The input terminal for ON/OFF output control ; @ is compatible with IS-‘ITI+

and direct driving by ‘ITL or C-MOS standard logic (RCA 4000 series) is

also available. In case that ON/OFF terminal is not used, we recommend

to connect the ON/OFF terminal dire&Q to the input terminal ; @ input voltage.

(3) As voltage application under conditions that the device pin is inserted divergently or

reversely, may occur the degradation of characteristics or breakdown of the device.

please avoid it absolutely.

7.2 Thermal protection design

I

(.

i\

Internal power dissipation (Pd) of device is obtained by the

following equation.

Pd=IoX(Vin-Vo)+VinXIq

If the maximum operating temperature and Pd (MAX.) when the device is

operating are determined. use such a heat sink as allows the device to

operate within the safety operation area specified by the derating curve

in para. 3.4. Insufhcient radiation gives an unfavorable infIuence

to the normal operation and reliabihty of the device. In the case of no

passage within the safety operational territory fflustrated by the derating

curve, the overheat protectton circuit operates to let output fall down, please

avoid keeping such condition for a long time.

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