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TDA3665

Very low dropout voltage/quiescent current 8.5 V voltage regulator

Philips Electronics 

Philips Semiconductors

Very low dropout voltage/quiescent current

8.5 V voltage regulator

Preliminary specification

TDA3665

handboo5k,0h0alfpage

VREG(drop)

(mV)

400

300

200

100

0

40

MDA957

80

120

IREG (mA)

handbook,1h0alfpage

VREG

(V)

8

6

4

2

0

0

100

MGU150

200

300

IREG (mA)

Fig.16 Dropout voltage as a function of the output

current.

VP = 10 V and pulsed load.

Fig.17 Foldback protection mode.

handbook−,3h0alfpage

SVRR

(dB)

−40

MDA956

(1)

(2)

−50

(3)

(1)

−60

(2)

−70 (3)

10

102

103

104

105

f (Hz)

C2 = 10 µF.

(1) SVRR at RL = 10 kΩ.

(2) SVRR at RL = 500 Ω.

(3) SVRR at RL = 100 Ω.

Fig.18 SVRR as a function of the ripple frequency.

2000 Apr 25

11

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