Si9183 is a high performance yet size saving 150-mA CMOS LDO (low dropout) voltage regulator from Vishay Siliconix. Its ultra low ground current and dropout voltage prolong battery life in portable electronics. The device provides LINE/LOAD transient response and ripple rejection superior to that of Bipolar or BiCMOS LDO regulators. It is designed to maintain regulation while delivering 300-mA peak current. The Si9183 drives lower cost ceramic, as well as tantalum, output capacitors. Stability is guaranteed from maximum load current down to 0-mA load. An external noise bypass capacitor connected to the device’s CBP pin will reduce the LDO’s self-noise for low noise applications. The Si9183 includes a shutdown feature that allows users to disable the device when not needed.
The Si9183 is a high-performance, size-saving 150-mA CMOS Low Dropout (LDO) voltage regulator designed for battery-powered portable systems. It features an ultra-low ground current and dropout voltage to prolong battery life, while providing superior line/load transient response and ripple rejection compared to Bipolar or BICMOS regulators.
The device is available in two versions: Version A offers low noise performance with a built-in bypass pin (BP), while Version B features an adjustable output voltage via the Feedback (FB) pin. Both versions are housed in a Thin SOT-23 5-Pin package and include built-in short circuit and thermal protection.
| Output Current (Guaranteed) | 150 mA |
|---|---|
| Peak Output Current Capability | 300 mA |
| Dropout Voltage (Typical) | 135 mV |
| Shutdown Supply Current | 1 mA Maximum |
| Package Type | Thin SOT-23 5-Pin |
The device is available in fixed voltages of 1.5V, 1.8V, 2.0V, 2.5V, 2.7V, 2.8V, 2.85V, 3.0V, 3.3V, 3.6V, and 5.0V, or as an adjustable version.
Yes, it includes built-in short circuit and thermal protection to ensure device safety under fault conditions.