ADP3367 Analog Devices, ADP3367 Datasheet - Page 8

• Manufacturer Part Number: ADP3367
• Description: +5 V Fixed, Adjustable Low-Dropout Linear Voltage Regulator
• Manufacturer: Analog Devices

ADP3367
processor. Monitoring the supply, the ADM705 will generate a
reset if the supply voltage falls below 4.65 V. Early warning of
an impending power fail is generated by a power fail comparator
on the ADM705. A resistive divider network samples the pre-
regulator input voltage so that failing power is detected while
the regulator is still operating normally. An interrupt is gener-
ated so that a power-down sequence can be completed before
power is completely lost. The low dropout voltage on the
ADP3367 maximizes the available time to carry out the power-
down sequence. The resistor divider network R1 and R2 should
be selected so that the voltage on PFI is 1.25 V at the desired
warning voltage.
0.0098 (0.25)
0.0040 (0.10)
PIN 1
Dimensions shown in inches and (mm).
0.0500
(1.27)
8
1
BSC
0.1968 (5.00)
0.1890 (4.80)
8-Lead Narrow-Body SOIC
OUTLINE DIMENSIONS
0.0192 (0.49)
0.0138 (0.35)
5
4
0.0688 (1.75)
0.0532 (1.35)
0.1574 (4.00)
0.1497 (3.80)
(SO-8)
–8–
0.2440 (6.20)
0.2284 (5.80)
0.0098 (0.25)
0.0075 (0.19)
Figure 15.
Power-Fail Warning
UNREGULATED
8
0
0.0196 (0.50)
0.0099 (0.25)
DC
P Regulator with Supply Monitoring and Early
R1
R2
0.0500 (1.27)
0.0160 (0.41)
x 45
IN
PFI
GND
ADP3367
ADM705
V
GND
SET SHDN
CC
RESET
OUT
PFO
+5V
+
10µF
RESET
INTERRUPT
V
µP
CC
REV. 0