The MAX16161/MAX16162 are ultra-low current, single-channel
supervisory ICs. The devices monitor the power
supply voltage and assert a reset when the input voltage
falls below the reset threshold. After the monitoring voltage
rises above the factory-set threshold voltage (VTH),
the reset output remains asserted for the reset timeout
period and then deasserts, allowing the target microcontroller
or microprocessor to leave the reset state and begin
operating.
Unlike conventional supervisors, which are unable to control
the reset output state when VCC is very low, the
MAX16161/MAX16162 reset output is guaranteed to remain
asserted until after a valid VCC is achieved. This
is especially important to avoid low-voltage cores leaving
the reset state during power-up or power-down. This also
improves performance when using the MAX16161/MAX16162 as simple power supply sequencers, because
the devices will never cause a transient enable of a downstream
power supply due to output glitches.
The MAX16161 features a manual reset (MR) input that
asserts a reset when it receives an appropriate input signal,
which may be either active-low or active-high, depending
on the option. The MAX16162 has no MR input.
Instead, it has separate VCC and VIN pins, allowing
threshold voltages as low as 0.6V. The reset output is active-
low open-drain, and the MAX16161/MAX16162 offer
multiple available reset timeout period options.
The MAX16161/MAX16162 are specified over the −40°C
to +125°C temperature range and are available in tiny,
1.06mm × 0.73mm, 4-bump WLP and 4-pin SOT23 packages. The MAX16162 is also available in a 5-pin SOT23 package.
Applications
- e-Readers/Tablets
- Low-Voltage Microcontrollers and Microprocessors
- Portable/Battery-Powered Equipment
- Smart Phones
- Wearable/Portable Accessories
