Sipex Corp. (Milpitas, CA) announced its new SPX3819, low dropout (LDO) linear regulator, which is now available in 1.8V, 2.5V, 3.0V, 3.1, 3.3V and 5.0V fixed-output voltages. The LDOs can deliver up to 500mA of continuous output current with 340mV of dropout voltage, and a low noise output of 40uVRMS (10Hz to 100kHz). The SPX3819 is suitable for portable applications such as cell phones and PDAs, where low dropout, low noise and small size are a must.
To optimize battery life, the SPX3819 operates at a range of 2.5V to 16V with a low supply current of 90µA, which drops to nearly 0 in shutdown. A LDO voltage of 340mV at full load current allows small voltage differential operation further extending operation time. The SPX3819 also reduces board space by providing fixed-output voltages, which eliminate the need for external voltage-setting resistors. Other key features include reverse battery protection, foldback current limit and load dump protection.
The SPX3819-1.8, SPX3819-3.0 and SPX3819-3.1 join the existing SPX3819 family of LDOs, which are also available with fixed-output voltages of 2.5V, 3.3V and 5.0V. All versions are currently available in a five-pin, SOT-23 package. Pricing starts at $0.75 each in 1,000-unit quantities.