high ripple-rejection ldo
regulator
description
the utc lr1121b is cmos-based voltage regulator ics with
high output voltage accuracy, extremely low current, low
on-resistance, and high ripple rejection.
an on/off circuit enables the output to be turned off, ensuring
a long battery life. a built-in low on-resistance transistor provides a
low dropout voltage and large output current, and a built-in
overcurrent protector prevents the load current from exceeding the
current capacitance of the output transistor.
the line transient response and load transient of the utc
lr1121b is excellent.
features
* ultra-low supply current :
during operation: 30μa typ.
during standby: 0.1μa typ.
* output voltage: 1.5v ~ 5.5v, selectable in 0.1 v steps.
* high output voltage accuracy: ±2.0%
* low dropout voltage: 180 mv typ. (2.8 v output product,
iout = 100 ma)
* high ripple rejection: 70 db typ. (@ 1.0 khz)
* low temperature-drift coefficient of output voltage:
±100ppm/℃ typ.
* high peak current capability: 150 ma output is possible (@ vin ≥
vout(s) + 1.0 v)