lx7001 Microsemi Corporation, lx7001 Datasheet - Page 9

• Manufacturer Part Number: lx7001
• Description: Transient Immune Undervoltage Sensing Circuit
• Manufacturer: Microsemi Corporation

Copyright © 1999
Rev. 1.2
Comparator hysteresis can be increased with the addition of resistor R
hysteresis equation has been simplified and does not account for the change of
input current I
lower threshold V
4.59V. The equations are accurate to ±10% with R
between 1.5k
6/99
POWER
SUPPLY
FIGURE 17. — LOW VOLTAGE MICROPROCESSOR RESET
I
IN
IN
and 10k .
as V
R
V
H
IN
1.2 V
TH (LOWER)
CC
with ADDITIONAL HYSTERESIS.
REF
crosses the comparator threshold. An increase of the
will be observed due to I
PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
T
T Y P I C A L A P P L I C AT I O N C I R C U I T S
RANSIENT
P
RESET
R O D U C T I O N
H
V
Where: R
less than 150 and R
I
R
IN
V
M M U N E
L
H
which is typically 340µA at
TH (LOWER)
=
MICROPROCESSOR
4.6 R
CIRCUIT
R
R
L
H
L
= 340 R
U
H
NDERV O LTAGE
1.5
150
+ 0.02
H
. The
H
L
x 10
D
10k
A T A
-6
S
(mV) (mV)
112
100
164
190
327
276
480
20
51
40
81
71
ENSING
V
S
H
H E E T
TEST DATA
3.4
6.8
6.8
10
10
16
16
34
34
51
51
V
0
TH
C
IRCUIT
(Con't.)
100
100
150
150
( )
10
20
20
30
30
47
47
R
0
H
1.5
4.7
1.5
2.7
1.5
2.7
1.5
2.7
1.5
2.7
1.5
( )
R
0
L
LX7001
9