MAX6506 Datasheet, PDF (6/12 Pages) Maxim Integrated Products – Dual Trip SOT Temperature Switches

Dual Trip SOT Temperature Switches
Table 2. Hysteresis Selection
PART
MAX6505
MAX6506
MAX6507
MAX6508
ALARM
2°C
—
-—
-—
CONDITIONS
—
—
—
TYPICAL THRESHOLD HYSTERESIS
WARN
CONDITIONS
5°C
∆TWA = 5°C or 10°C
10°C
∆TWA = 20°C or 30°C
—
—
—
—
—
OK, OVER
—
2°C
10°C
S0 = GND
S0 = VCC
+75°C
TEMPERATURE
-10°C
OVER
HYSTERESIS ≈ 2°C
-10°C
HYSFERESIS ≈ 2°C
+2.5V TO +5.5V
V_CC
*
S1
ALARM
SYSTEM
SHUTDOWN
S0
MAX6506 _WARN
FAN CONTROL
GND
OK
Figure 2. Temperature Response—MAX6507A04B Outputs
with 2°C Hysteresis
power is dissipated within the IC. This corresponds to a
+0.288°C shift in the die temperature in the SOT23-6.
Power Supply and Bypassing
The MAX6505 and MAX6508 operate from a single-
supply voltage in the +2.5V to +5.5V range. Connect a
0.1µF capacitor on the supply voltage line close to the
V_CC pin for bypassing.
Low-Cost, Fail-Safe Temperature Monitor
The MAX6505/MAX6506 provide two outputs that can be
used for fail-safe temperature applications (Figure 3). For
example, the first output can activate a fan when the die
temperature exceeds a certain preset temperature. The
second output asserts at a higher temperature that could
be caused by a wide variety of destructive fault condi-
tions, including latchup, short circuit, and cooling system
failure. This output can be used to initiate such actions
as shutdown of the entire system (see Typical Operating
Circuits).
*∆T_AW = T_ALARM - T_WARN IS SET TO +30°C.
Figure 3. Low-Power, High-Reliability, Fail-Safe Temperature
Monitor
The high-level integration, low cost, and small size of the
MAX6505–MAX6508 facilitate the use of multiple temper-
ature monitors to increase system reliability.
6 _______________________________________________________________________________________