SPX2969 Datasheet, PDF (4/9 Pages) Sipex Corporation – 150mA Low Dropout Voltage Regulator

APPLICATIONS INFORMATION
The input capacitor CI is necessary for compensating line influences. Using a resistor of
approximately 1Ω in series with CI, the oscillating circuit consisting of input inductivity and input
capacitance can be damped. The output capacitor CQ is necessary for the stability of the
regulating circuit. Stability is guarantted at values ≥ 10µF and an ESR ≤ 10Ω within the operating
temerature range. For small tolerances of the reset delay the spread of the capacitance of the
delay capacitor and its temperature coefficient should be noted.
BLOCK DIAGRAM
I
REFERENCE
ERROR AMPLIFIER
CURRENT AND
SATURATION
CONTROL
TRIMMING
D
&
RADJ
SI
REFERENCE
Q
RO
SO
Date: 8/4/04
SPX2969 150mA Low Dropout Voltage Regulator
4
© Copyright 2004 Sipex Corporation