MAX6774

(All pins referenced to GND, unless otherwise noted.)
V_IN ..........................................................................-0.3V to +80V
OUT .................................................-0.3V to min (12V, IN + 0.3V)
ENABLE, ENABLE1, ENABLE2 ..........................-0.3V to (IN + 0.3V)
RESET (open-drain output), TIMEOUT, WDI,
RESETIN, SET............................................................-0.3V to 12V
RESET (push-pull output), HOLD .................-0.3V to (OUT + 0.3V)
Maximum Current (all pins except IN and OUT)....................50mA
Continuous Power Dissipation (T_A = +70)
6-Pin TDFN 3mm x 3mm
(derate 23.8mW/ above +70)................................1904.8mW
8-Pin TDFN 3mm x 3mm
(derate 24.4mW/ above +70)................................1951.2mW
Operating Temperature Range ............................-40 to +125
Junction Temperature.........................................................+150
Storage Temperature Range ...............................-65 to +150
Lead Temperature (soldering, 10s) ..................................+300
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX6765MAX6774B are low-quiescent-current, high-voltage linear regulators that operate from 4V to 72V and deliver up to 100mA of load current. These lowpower devices consume only 31A of quiescent current, making them ideal for always-on automotive modules.

These MAX6774 are offered with fixed standard output options of 5.0V, 3.3V, 2.5V, and 1.8V, or can be adjusted from 1.8V to 11V with two external resistors.

The MAX6765MAX6774B feature a push-pull or opendrain, active-low RESET output with either fixed or adjustable thresholds. Whenever the regulator's output falls below the reset threshold, the RESET output asserts and remains asserted for at least the minimum reset timeout period after the output voltage exceeds its threshold. The minimum reset timeout period is offered with fixed values from 75s to 200ms or can be adjusted externally with a small capacitor.

These devices provide three regulator enable modes to accommodate several power-on schemes. The MAX6765/MAX6766/MAX6769/MAX6770/MAX6773/ MAX6773B/MAX6774/MAX6774B feature a single traditional enable input (ENABLE) to turn on and off the regulator.

The MAX6771/MAX6772 provide dual enable inputs (ENABLE1 and ENABLE2) to turn on and off the regulator either through an ignition switch or a bus transceiver. The MAX6767/MAX6768 provide a hold input (HOLD) in addition to the enable input to allow for the implementation of a self-holding circuit without requiring external components.

Setting HOLD low after enabling the regulator forces the regulator to remain on even if ENABLE is subsequently set low. Releasing HOLD shuts down the regulator.

The MAX6773/MAX6773B/MAX6774/MAX6774B also include a watchdog input that monitors a pulse train from the microprocessor (P) and generates a reset pulse if the watchdog input remains high or low for a duration longer than the 1.6s (typ) (MAX6773/MAX6774) or 50ms (typ) (MAX6773B/MAX6774B) watchdog timeout period.

The MAX6765MAX6774B are available in a small, thermally enhanced 3mm x 3mm TDFN package that can dissipate up to 1.951W, thereby supporting continuous regulator operation during high ambient temperatures, high battery voltage, and high load-current conditions.

The MAX6765MAX6774B are fully specified for a -40 to +125 operating temperature range.