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MAX6442UT_T Datasheet(PDF) 11 Page - Maxim Integrated Products

Part # MAX6442UT_T
Description  Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated uP Reset
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX6442UT_T Datasheet(HTML) 11 Page - Maxim Integrated Products

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DC-to-DC Converter Application
The MAX6441/MAX6442 triple-output battery monitors
can be used in conjunction with a DC-to-DC converter
to power microprocessor systems using a single Li+
cell or two to three alkaline/NiCd/NiMH cells. The LBOH
output indicates that the battery voltage is weak, and is
used to warn the microprocessor of potential problems.
Armed with this information, the microprocessor can
reduce system power consumption. The LBOL output
indicates the battery is empty, and system power
should be disabled. By connecting LBOL to the SHDN
pin of the DC-to-DC converter, power to the microproces-
sor is removed. Microprocessor power does not return
until the battery has recharged to a voltage greater than
VLTH+ (see Figure 7).
Low-Power, Single-/Dual-Level Battery Monitors
with Hysteresis and Integrated µP Reset
______________________________________________________________________________________
11
UPPER THRESHOLD (HTH)
VOLTAGES
3.3V
3.4V
3.5V
3.6V
2.6V
AG
AH
AI
AJ
2.7V
BG
BH
BI
BJ
2.8V
CG
CH
CI
CJ
2.9V
DG
DH
DI
DJ
3.0V
EG
EH
EI
EJ
LOWER
THRESHOLD
(LTH)
3.1V
FG
FH
FI
FJ
Table 1. Factory-Trimmed Lower and Upper Threshold Combinations for Single-Cell Li+
or Three-Cell Alkaline/NiCd/NiMH Applications
UPPER THRESHOLD (HTH)
VOLTAGES
2.3V
2.4V
2.5V
2.6V
1.6V
KQ
KR
KS
KT
1.7V
LQ
LR
LS
LT
1.8V
MQ
MR
MS
MT
1.9V
NQ
NR
NS
NT
2.0V
OQ
OR
OS
OT
LOWER
THRESHOLD
(LTH)
2.1V
PQ
PR
PS
PT
Table 2. Factory-Trimmed Lower and Upper Threshold Combinations for Two-Cell
Alkaline/NiCd/NiMH Applications
PART NO.
SUFFIX
( _ )
VCC NOMINAL
RESET
THRESHOLD (V)
T
3.075
S
2.925
R
2.625
Z
2.313
Y
2.188
W
1.665
V
1.575
Table 3. Factory-Trimmed VCC Reset
Threshold Levels
ACTIVE TIMEOUT PERIOD (ms)
TIMEOUT
PERIOD SUFFIX
MIN
MAX
D3
150
300
D7
1200
2400
Table 4. VCC Reset Timeout Period Suffix
Guide


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