Datasheet ADP1710, ADP1711 (Analog Devices) - 9

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ADP1710/ADP1711
As can be seen, the EN pin has hysteresis built in. This prevents
UNDERVOLTAGE LOCKOUT (UVLO)
on/off oscillations that can occur due to noise on the EN pin as The ADP1710/ADP1711 have an undervoltage lockout circuit, it passes through the threshold points. which monitors the voltage on the IN pin. When the voltage on The EN pin active/inactive thresholds are derived from the IN IN drops below 1.95 V (minimum), the circuit activates, disabling voltage. Therefore, these thresholds vary with changing input the OUT pin. voltage. Figure 20 shows typical EN active/inactive thresholds when the input voltage varies from 2.5 V to 5.5 V.
1.4 1.3 ) V 1.2 EN ACTIVE ( DS L 1.1 HO HYSTERESIS S 1.0 HRE N T 0.9 E 0.8 ICAL P Y T 0.7 EN INACTIVE 0.6 0.5 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50
0 -02
V
10
IN (V)
063 Figure 20. Typical EN Pin Thresholds vs. Input Voltage Rev. 0 | Page 9 of 16 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ADJUSTABLE OUTPUT VOLTAGE (ADP1710 ADJUSTABLE) BYPASS CAPACITOR (ADP1711) ENABLE FEATURE UNDERVOLTAGE LOCKOUT (UVLO) APPLICATION INFORMATION CAPACITOR SELECTION CURRENT LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE