National Intros Power Management IC with Digital Control for Portable Systems
National Semiconductor Corp. has introduced a system power management IC with digitally controlled sequencing. Packaged in a very small leadless leadframe package (LLP®), the LP3927 is targeted for use in cellular and PCS handsets as well as other portable systems that require intelligent power management.
The LP3927 contains five low-dropout linear regulators (LDOs), a reset timer, power-up control logic, a general-purpose open drain output that can be used to light LEDs and a CMOS rail-to-rail input/output operational amplifier. Each LDO features an extremely low dropout voltage of 100 mV at maximum load current. The maximum load current supported by the LDOs ranges from 100 mA to 200 mA. All the linear regulators are optimized for use with sensitive analog and RF loads that need low noise and high power supply rejection.
The LP3927 offers a 3.0V to 5.5V input voltage range. Two of the LDOs are rated for 200 mA, two are rated for 150 mA and one is rated for 100 mA. This IC features 100 mV typical dropout voltage at maximum load currentand 150 mA general-purpose open-drain programmable current sink for LED lighting.
National's LP3927 is available now and packaged in a 28-pin LLP. The LP3927 costs $2.04 in quantities of 1,000. Lead-free package options are also available.
