G923-470T1U datasheet(8/9 Pages) GMT

Part #	G923-470T1U

Description	300mA High PSRR LDO Regulators

Download	9 Pages

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Manufacturer	GMT [Global Mixed-mode Technology Inc]

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

Logo

8 / 9 page

Ver: 1.5

Jan 16, 2007

TEL: 886-3-5788833

http://www.gmt.com.tw

8

G923

Global Mixed-mode Technology Inc.

Layout Guide

An input capacitance of

≅ 1µF is required between the

G923 input pin and ground (the amount of the capaci-

tance may be increased without limit), This capacitor

must be located a distance of not more than 1cm from

the input and return to a clean analog ground.

Input capacitor can filter out the input voltage spike

caused by the surge current due to the inductive effect

of the package pin and the printed circuit board’s rout-

ing wire. Otherwise, the actual voltage at the IN pin

may exceed the absolute maximum rating.

The output capacitor also must be located a distance

of not more than 1cm from output to a clean analog

ground. Because it can filter out the output spike

caused by the surge current due to the inductive effect

of the package pin and the printed circuit board’s rout-

ing wire. Figure 6 is adjustable mode of G923 PCB

layout. Figure 7 is a PCB layout of G923 fixed mode.

Safe Operating Area of G923

[Power Dissipation Limit]

0

50

100

150

200

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Input-Output Voltage Differential V

IN-VOUT (V)

TA=25oC,Still Air

1oz Copper on SOT-23-5 Package

Mounted on recommended mimimum footprint (RθJA=240°C/W)

Maximum Recommended Output Current

Note: V

IN(max) <= 5.5V

Maximum Power Dissipation of SOT-23-5

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

25

35

45

55

65

75

85

95 105 115 125

Amibent Temperature T

A (°C)

Still Air

1oz Copper on SOT-23-5 Package

Mounted on recommend mimimum footprint (RθJA=240°C/W)

Figure 6. Adjustable Mode

*Distance betw een pin & capacitor must no more than 1cm

Figure 7. Fixed Mode

*Distance betw een pin & capacitor must no more than 1cm

T

A=85°C

T

A=55°C

T

A=25°C

Figure 4. Safe Operating Area

Figure 5. Power Dissipation vs. Temperature

SOT-23-5

Figure 3. Recommended Minimum Footprint

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G923-470T1U Datasheet(PDF) 8 Page - Global Mixed-mode Technology Inc

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