AT73C239_14 Datasheet, PDF (7/31 Pages) ATMEL Corporation – Independent 2.5V to 3.6V Auxiliary Supply for Backup Section

6.2 LDO2
AT73C239
LDO2 is a 30 mA/1.5V-1.8V linear low drop out regulator with RF performance. LDO2 operates
with supply from 3.0V to 3.6V and needs at least 300 mV of minimum drop-out. LDO2supplies
the RF section of wireless devices, showing high PSRR up to 100 kHz and very low noise on
wide frequency bandwidth. LDO2 requires a 1 µF output capacitor.
Figure 6-2. LDO2 Functional Diagram
current
reference
V_BG
V_DD2
V_IN
V_O2
overcurrent
detection
sel2
C_OUT2
GNDA
onldo2
AV_SS
GNDA
7
6201C–PMAAC–31-Jul-07