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MAX6349ZP Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX6349ZP Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 11 page 150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit _______________________________________________________________________________________ 7 5% reset: Reset does not assert until the regulator out- put voltage is at least -5% out of tolerance and always asserts before the regulator output voltage is -10% out of tolerance. 10% reset: Reset does not assert until the regulator output voltage is at least -10% out of tolerance and always asserts before the regulator output voltage is -15% out of tolerance. Reset Output A µP’s reset input starts the µP in a known state. The MAX6329/MAX6349 µP supervisory circuits assert a reset during power-up, power-down, and brownout conditions. Reset is guaranteed to be logic high or low depending on the device chosen (see Selector Guide). RESET or RESET asserts when VOUT is below the reset threshold and for at least 100ms (tRP) after VOUT rises above the reset threshold. RESET or RESET also asserts when MR is low (MAX6349). Shutdown (MAX6329 Only) SHDN allows for the regulator to shutdown thereby reducing the total IIN consumption of the device. The MAX6329 provides a digitally controlled active-low shutdown function. In shutdown mode the pass transis- tor, control circuit, reference, and all biases turn off, reducing the supply current to below 1µA. Connect SHDN to IN for normal operation. Manual Reset Input (MAX6349 Only) Many µP-based products require manual reset capabil- ity, allowing the operator, a test technician, or external logic circuitry to initiate a reset. For the MAX6349, a Figure 2. Functional Diagram REVERSE LEAKAGE PROTECTION THERMAL SENSOR MOS DRIVER WITH CURRENT LIMIT 1.23V 60mV OUTPUT STAGE 200ms RESET DELAY RESET COMPARATOR GND MR FEEDBACK MODE COMPARATOR ERROR AMP IN SHDN OUT SET RESET/RESET |
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