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LP3996SDX-1525 Datasheet(PDF) 6 Page - National Semiconductor (TI) |
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LP3996SDX-1525 Datasheet(HTML) 6 Page - National Semiconductor (TI) |
6 / 16 page Electrical Characteristics(Notes 2, 8) (Continued) Unless otherwise noted, V EN = 950mV, VIN =VOUT + 1.0V, or 2.0V, whichever is higher, where VOUT is the higher of VOUT1 and V OUT2.CIN = 1 µF, IOUT = 1 mA, COUT1 =COUT2 = 1.0µF. Typical values and limits appearing in normal type apply for TA = 25˚C. Limits appearing in boldface type apply over the full junction temperature range for operation, −40 to +125˚C. Symbol Parameter Conditions Typ Limit Units Min Max PSRR Power Supply Rejection Ratio (Note 11) f = 1kHz, I OUT = 1mA to 150mA C BYP = 10nF LDO1 58 dB LDO2 70 f = 20kHz, I OUT = 1mA to 150mA C BYP = 10nF LDO1 45 LDO2 60 e n Output noise Voltage (Note 11) BW = 10Hz to 100kHz C BYP = 10nF V OUT = 0.8V 36 µV RMS V OUT = 3.3V 75 T SHUTDOWN Thermal Shutdown Temperature 160 ˚C Hysteresis 20 Enable Control Characteristics I EN Input Current at V EN1 or VEN2 V EN = 0.0V 0.005 0.1 µA V EN =6V 2 5 V IL Low Input Threshold at V EN1 or V EN2 0.4 V V IH High Input Threshold at V EN1 or V EN2 0.95 V POR Output Characteristics V TH Low Threshold % 0f V OUT2 (NOM) Flag ON 88 % High Threshold % 0f V OUT2 (NOM) Flag OFF 96 I POR Leakage Current Flag OFF, V POR = 6.5V 30 nA V OL Flag Output Low Voltage I SINK = 250µA 20 mV Timing Characteristics T ON Turn On Time (Note 11) To 95% Level C BYP = 10nF 300 µs Transient Response Line Transient Response | δV OUT| (Note 11) T rise =Tfall = 10µs δV IN = 1VCBYP = 10nF 20 mV (pk - pk) Load Transient Response | δV OUT| (Note 11) T rise =Tfall = 1µs LDO 1 I OUT = 1mA to 150mA 175 LDO 2 I OUT = 1mA to 300mA 150 SET Input Characteristics I SET SET Pin Current Source V SET = 0V 1.3 µA V TH(SET) SET Pin Threshold Voltage POR = High 1.25 V www.national.com 6 |
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