MAX6429FJUR+T Maxim Integrated Products, MAX6429FJUR+T Datasheet - Page 9

• Manufacturer Part Number: MAX6429FJUR+T
• Description: IC MONITOR BAT LP SOT23-3
• Manufacturer: Maxim Integrated Products

Specifications of MAX6429FJUR+T

• Function: Battery Monitor
• Battery Type: Alkaline, Li-Ion, NiCd, NiMH
• Voltage - Supply: 1 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Hysteresis increases the comparator’s noise margin by
increasing the upper threshold or decreasing the lower
threshold (see Figure 8). The hysteresis prevents the
output from oscillating (chattering) when BATT or V
is near the low-battery threshold. This is especially
important for applications where the load on the battery
creates significant fluctuations in battery voltages.
The MAX6427/MAX6428/MAX6429 total hysteresis is the
difference between the factory-trimmed V
For the MAX6430/MAX6431/MAX6432, the total hysteresis
is the difference between the factory-trimmed V
V
Figure 3. MAX6433/MAX6434/MAX6435 Functional Diagram
HTH+
Low-Power, Single/Dual-Level Battery Monitors
or V
LTH-
Fixed Hysteresis (MAX6427–MAX6432)
and V
_______________________________________________________________________________________
LTH+
( ) ARE FOR THE MAX6435
RESISTOR-
EXTERNAL
DIVIDER
V
values, approximately 5%.
BATT
HTHIN
LTHIN
615
mV
V
DD
+
-
LTH
Hysteresis
and V
HTH-
V
HTH.
and
DD
DD
Figure 7 shows the correct connections for the external
resistor-dividers. To adjust the low-battery threshold
and hysteresis connect resistor R1 between V
LTHIN, resistor R2 between LTHIN and HTHIN, and R3
between HTHIN and GND. The hysteresis for the
MAX6433–MAX6438 is determined by an external resis-
tor-divider network (see Resistor-Value Selection sec-
tion of Applications Information). The hysteresis for the
MAX6436/MAX6437/MAX6438 is the differences
between V
V
LTHIN+
LBO TIMEOUT
PERIOD
(~5%).
Adjustable Hysteresis (MAX6433–MAX6438)
HTHIN-
with Hysteresis
and V
R
S
HTHIN+
Q
Q
(~5%) or V
LBO
(LBO)
LTHIN-
DD
and
and
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