The MAX6765–MAX6774B are low-quiescent-current,
high-voltage linear regulators that operate from 4V to 72V
and deliver up to 100mA of load current. These low-power
devices consume only 31µA of quiescent current,
making them ideal for always-on automotive modules.
These devices 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 MAX6765–MAX6774B feature a push-pull or open-drain,
active-low RESET output with either fixed or
adjustable thresholds. Whenever the regulator's output
falls below the reset threshold, the active-low 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 75µs 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 traditionalenable 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 (active-low HOLD) in addition
to the enable input to allow for the implementation of a
self-holding circuit without requiring external components.
Setting active-low HOLD low after enabling the regulator forces the
regulator to remain on even if ENABLE is subsequently
set low. Releasing active-low HOLD shuts down the regulator.
The MAX6773/MAX6773B/MAX6774/MAX6774B also
include a watchdog input that monitors a pulse train from
the microprocessor (µP) 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 MAX6765–MAX6774B 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 MAX6765–MAX6774B are fully specified for a -40°C
to +125°C operating temperature range.
Key Features
Applications/Uses
Low 31µA Quiescent Current
4V to 72V Wide Input Voltage Range
100mA Output Current Capability
Dropout Voltage of 620mV with 5V Output at 100mA
Fixed Output-Voltage Options: 5V, 3.3V, 2.5V, and 1.8V
Watchdog Timer Option (1.6s (MAX6773/MAX6774) and 50ms (MAX6773B/MAX6774B))
Adjustable Output Voltages from 1.8V to 11V
Open-Drain or Push-Pull Active-Low RESET Output
Fixed or Capacitor-Adjustable Reset Timeouts
Small, Thermally Enhanced 1.9W, 3mm x 3mm TDFN Package
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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