The ISL9000A is a high-performance dual LDO that can source 300mA current from each output. It has a low standby current and very high PSRR, and is stable with output capacitance of 1µF to 10µF with ESR of up to 200mΩ. The device integrates an individual Power-On-Reset (POR) function for each output. The POR delay for VO2 can be externally programmed by connecting a timing capacitor to the CPOR pin. The POR delay for VO1 is internally fixed at approximately 2ms. A reference bypass pin is also provided for connecting a noise filtering capacitor for low noise and high-PSRR applications. The quiescent current is typically only 42µA with both LDO’s enabled and active. Separate enable pins control each individual LDO output. When both enable pins are low, the device is in shutdown, typically drawing less than 0.1µA. Several combinations of voltage outputs are standard. Output voltage options for each LDO range from 1.5V to 3.3V. Other output voltage options may be available upon request.
The ISL9000A is a high‑performance dual low‑dropout (LDO) regulator capable of delivering up to 300 mA per output. It offers low standby current, very high power‑supply rejection (PSRR), and low output noise, making it suitable for noise‑sensitive portable devices.
Key features include separate enable and POR pins for each LDO, programmable output voltages from 1.5 V to 3.3 V, soft‑start circuitry, and built‑in current‑limit and over‑heat protection. The device is offered in a 10‑lead 3 mm × 3 mm DFN package and is RoHS compliant.
| Maximum Output Current per LDO | 300 mA |
|---|---|
| Quiescent Current (both LDOs enabled) | 42 µA |
| Dropout Voltage (typical) | 200 mV @ 300 mA |
| PSRR | 90 dB @ 1 kHz |
| Output Noise | 30 µV rms @ 100 µA (1.5 V) |
| Input Voltage Range | 2.3 V to 6.5 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 10‑lead 3 mm × 3 mm DFN |
The typical quiescent current is 42 µA with both LDOs enabled.
By connecting a timing capacitor to the CPOR pin; the VO1 POR delay is fixed at about 2 ms.
Each LDO can source up to 300 mA continuously.
It provides short‑circuit protection limiting output current to about 475 mA, over‑heat detection, and current‑limit circuitry.