ISL9001IRMZ-T

DATASHEET ISL9001 FN9231 Rev 2.00 March 28, 2008 LDO with Low ISUPPLY, High PSRR ISL9001 is a high performance Low Dropout linear regulator capable of sourcing 300mA current. It has a low standby current and high-PSRR and is stable with an output capacitance of 1µF to 10µF with an ESR of up to 200m. Features The ISL9001 has a very high PSRR of 90dB and outputs noise less than 30µVRMS. A reference bypass pin allows connection of a noise-filtering capacitor for low-noise and high-PSRR applications. When coupled with a no load quiescent current of 25µA (typical), and 0.1µA shutdown current, the ISL9001 is an ideal choice for portable wireless equipment. • Excellent load regulation: 2.8V 200 325 mV TSD+ 145 °C TSD- 110 °C @ 1kHz 90 dB @ 10kHz 70 dB @ 100kHz 50 dB IO = 100µA, VO = 1.5V, TA = +25°C, CBYP = 0.1µF BW = 10Hz to 100kHz 30 µVRMS AC CHARACTERISTICS Ripple Rejection (Note 6) Output Noise Voltage (Note 6) FN9231 Rev 2.00 March 28, 2008 IO = 10mA, VIN = 2.8V (min), VO = 1.8V, CBYP = 0.1µF Page 3 of 11 ISL9001 Electrical Specifications PARAMETER Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and temperature range of the device as follows: TA = -40°C to +85°C; VIN = (VO + 0.5V) to 5.5V with a minimum VIN of 2.3V; CIN = 1µF; CO = 1µF. (Continued) TYP MAX (Note 8) UNITS Time from assertion of the ENx pin to when the output voltage reaches 95% of the VO (nom) 250 500 µs Slope of linear portion of LDO output voltage ramp during start-up 30 60 µs/V SYMBOL MIN (Note 8) TEST CONDITIONS DEVICE START-UP CHARACTERISTICS Device Enable Time tEN LDO Soft-start Ramp Rate tSSR EN PIN CHARACTERISTICS Input Low Voltage VIL -0.3 0.5 V Input High Voltage VIH 1.4 VIN + 0.3 V 0.1 µA Input Leakage Current IIL, IIH Pin Capacitance CPIN Informative 5 pF POR PIN CHARACTERISTICS POR Thresholds VPOR+ As a percentage of nominal output voltage VPORPOR Delay tPLH CPOR = 0.01µF 91 94 97 % 87 90 93 % 100 200 300 ms tPHL POR Pin Output Low Voltage POR Pin Internal Pull-up Resistance VOL 25 @ IOL = 1.0mA RPOR 78 100 µs 0.2 V 180 k NOTES: 6. Limits established by characterization and are not production tested. 7. VOx = 0.98*VOx(NOM); Valid for VOx greater than 1.85V. 8. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested. EN tEN VPOR+ VPOR- VPOR+ VPOR-