nanoPower Supply Supervisors with Glitch-Free Power-Up

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

* No Powerup Glitch: (See Reliable Supervisor for Low-Voltage Processor Cores)

* 825nA (typ) Quiescent Current Extends Battery Life

* Positive and Negative Level-Triggered MR Input Options (MAX16161)

* MR Debounce Circuitry (MAX16161)

* Separate VCC and VIN Inputs (MAX16162)

* Multiple Available Reset Timeout Periods

* Threshold Voltage Options

* 1.7V to 4.85V (MAX16161)

* 0.6V to 4.85V (MAX16162)

* 4-Bump WLP, 4-Pin SOT23, and 5-Pin SOT23 Packages

* −40°C to +125°C Operating Temperature Range