EC8806VVB2R datasheet(10/13 Pages) E-CMOS

Part #	EC8806VVB2R

Description	Ultra-Low Noise Ultra-Fast 300mA LDO Regulator

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Manufacturer	E-CMOS [E-CMOS Corporation]

Direct Link	http://www.ecmos.com.tw/

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E-CMOS Corp. (www.ecmos.com.tw)

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4L03N-Rev.F001

EC8806

Ultra-Low Noise Ultra-Fast 300mA LDO

Regulator

Where:

VREF= 1.2V TYP. (the internal reference voltage)

To enable default output voltage (pre-set), connect ADJ pin to ground. There is no external component needed to

decide voltage.

Operating Region and Power Dissipation

Since the EC8806 is a linear regulator, its power dissipation is always given by P = IOUT (VIN – VOUT). The maximum

power dissipation is given by: PD(MAX) = (TJ–TA) /θJA =(125°C -25°C)/250°C /W = 500mW Where (TJ–TA) is the

temperature difference the EC8806 die and the ambient air,

θ

JA is the thermal resistance of the chosen package to

the ambient air. For surface mount device, heat sinking is accomplished by using the heat spreading capabilities of

the PC board and its copper traces. In the case of a SOT23-5 package, the thermal resistance is typically 240°C

/Watt. Refer to Figure 6 & 7 for the EC8806 valid operating region (Safe Operating Area) and refer to Figure 8 for

maximum power dissipation information of SOT23-5.

The die attachment area of the EC8806 lead frame is connected to pin 2, which is the GND pin. Therefore, the

GND pin of EC8806 can dissipate the heat from the die very effectively. To improve the maximum power providing

capability, connect the GND pin to ground using a large ground plane near the GND pin.

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