1 A, Low Dropout, CMOS Linear Regulator with Tracking

The ADP1706 / ADP1707 / ADP1708 are CMOS, low dropout linear regulators that operate from 2.5 V to 5.5 V and provide up to 1 A of output current. Using an advanced proprietary architecture, they provide high power supply rejection and achieve excellent line and load transient response with a small 4.7 μF ceramic output capacitor.

The ADP1706 / ADP1707 are available in 16 fixed output volt-age options. The ADP1708 is available in an adjustable version, which allows output voltages that range from 0.8 V to 5.0 V via an external divider. The ADP1706 allows an external soft start capacitor to be connected to program the start-up time; the ADP1707 and ADP1708 contain internal soft start capacitors that give a typical start-up time of 100 μs. The ADP1707 includes a tracking feature that allows the output to follow an external voltage rail or reference.

The ADP1706 / ADP1707 / ADP1708 are available in an 8-lead, exposed paddle SOIC package and an 8-lead, 3 mm × 3 mm exposed paddle LFCSP, making them not only very compact solutions but also providing excellent thermal performance for applications requiring up to 1 A of output current in a small, low profile footprint.

APPLICATIONS

* Notebook computers

* Memory components

* Telecommunications equipment

* Network equipment

* DSP/FPGA/microprocessor supplies

* Instrumentation equipment/data acquisition systems

* Maximum output current: 1 A

* Input voltage range: 2.5 V to 5.5 V

* Low shutdown current: <1 μA

* Low dropout voltage: 345 mV @ 1 A load

* Initial accuracy: ±1%

* Accuracy over line, load, and temperature: ±2.5%

* 16 fixed output voltage options with soft start: 0.75 V to 3.3 V (ADP1706)