Philips Semiconductors
Very low dropout voltage/quiescent current
3.3 V voltage regulator
Preliminary specification
TDA3663
handboo5k,0h0alfpage
VREG(drop)
(mV)
400
MDA957
4
handbook, halfpage
VREG
(V)
3
MGS696
300
2
200
1
100
0
40
80
120
IREG (mA)
Fig.16 Dropout voltage as a function of the output
current.
0
0
100
200
300
IREG (mA)
VP = 8 V and pulsed load.
Fig.17 Fold back protection mode.
handbook−,3h0alfpage
SVRR
(dB)
−40
MDA956
(1)
(2)
−50
(3)
(1)
−60
(2)
−70 (3)
10
102
103
104
105
f (Hz)
IREG = 10 mA; C2 = 10 µF.
(1) SVRR at RL = 100 Ω.
(2) SVRR at RL = 500 Ω.
(3) SVRR at RL = 10 kΩ.
Fig.18 SVRR as a function of the ripple frequency.
2000 Feb 01
11