MAX6769(2006) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX6769 Datasheet PDF : 23 Pages
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Automotive Micropower Linear Regulators
with Supervisor
Ensuring a Valid RESET Output Down to
VIN = 0V (MAX6766/MAX6768/MAX6770/
MAX6772/MAX6774)
When VIN falls below 1V, RESET current-sinking capa-
bilities decline drastically. High-impedance CMOS-
logic inputs connected to RESET can drift to
undetermined voltages. This presents no problems in
most applications, since most µPs and other circuitry
do not operate with supply voltages below 1V. In those
applications where RESET must be valid down to 0V,
adding a pulldown resistor between RESET and ground
sinks any stray leakage currents, holding RESET low
(Figure 5). The value of the pulldown resistor is not criti-
cal; 100kΩ is large enough not to load RESET and
small enough to pull RESET to ground. Open-drain
RESET versions are not recommended for applications
requiring valid logic for VIN down to 0V.
VIN
IN
MAX6766
MAX6768
MAX6770
MAX6772
MAX6774
RESET
GND
Figure 5. Ensuring RESET Valid to VIN = 0V
Table 4. Standard Version Part Numbers
PART
MAX6765TTLD2+T
MAX6765TTSD2+T
MAX6766TTLD2+T
MAX6766TTSD2+T
MAX6767TALD2+T
MAX6767TASD2+T
MAX6768TALD2+T
MAX6768TASD2+T
MAX6769TALD2+T
MAX6769TASD2+T
MAX6770TALD2+T
MAX6770TASD2+T
MAX6771TALD2+T
MAX6771TASD2+T
MAX6772TALD2+T
MAX6772TASD2+T
MAX6773TALD2+T
MAX6773TASD2+T
MAX6774TALD2+T
MAX6774TASD2+T
OUTPUT
VOLTAGE (V)
5
3.3
5
3.3
5
3.3
5
3.3
5
3.3
5
3.3
5
3.3
5
3.3
5
3.3
5
3.3
RESET TIMEOUT
PERIOD (ms)
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
RESET THRESHOLD
(V)
4.625
2.888
4.625
2.888
4.625
2.888
4.625
2.888
4.625
2.888
4.625
2.888
4.625
2.888
4.625
2.888
4.625
2.888
4.625
2.888
TOP MARK
+AQB
+AQL
+ARO
+ARZ
+AVI
+AVS
+AVZ
+AXE
+AYH
+AYQ
+AZS
+BAC
+BEG
+BEQ
+APY
+BGC
+BBG
+AQE
+BCS
+BDC
18 ______________________________________________________________________________________
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