MIC2775 Datasheet | Micrel Semiconductor

Micro-Power Voltage Supervisor Itty Bitty® General Description The MIC2775 is a power supply supervisor that provides undervoltage monitoring, manual reset capability, and power-on reset generation in a pact 5-pin SOT package. Features include an undervoltage detector, a delay generator, a manual reset input, and both activehigh and active-low reset outputs. The undervoltage detector pares VDD against a fixed threshold. Ten factory-programmed thresholds are available. The reset outputs are asserted for no less than 140ms at power-on and any time the input voltage drops below the reference voltage. It remains asserted for the timeout period after the input voltage subsequently rises back above the threshold boundary. A reset can be generated at any time by asserting the manual reset input, /MR. This reset output will remain active at least 140ms after the release of /MR. The /MR input can also be used to daisychain the MIC2775 onto existing power monitoring circuitry or other supervisors. Hysteresis is included to prevent chattering due to noise. Typical suppy current is an ultralow 3.5µA. Datasheets and support documentation are available on Micrel’s website at: .micrel.. Features - Monitors power supply for undervoltage conditions - Choice of factory-programmed thresholds - Generates 140ms (minimum) power-on reset pulse - Manual reset capability - Both active-high and active-low reset outputs - /RST output valid down to 1.2V - Ultra-low supply current, 3.5µA typical - Rejects brief input transients - No external ponents - For extended temperature range see Micrel’s MAX825 - Itty Bitty® 5-pin SOT-23 package Applications - Monitoring processor core and input/output voltages - puter systems - PDAs, handheld PCs - Embedded controllers - Telemunications systems - Power supplies Typical Application Itty Bitty is a registered trademark of Micrel, Inc. Micrel Inc. - 2180 Fortune Drive - San Jose, CA 95131 -...