●The LP38859 is a high-current, fast-response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIAS provides voltage to drive the gate of the N-MOS power transistor, while VIN is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra-low VIN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.
●The fast transient response of this device makes it suitable for use in powering DSP microcontroller core voltages and switch-mode power-supply post-regulators. The LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages.
●For all available packages, see the orderable addendum at the end of the data sheet.
● Input Voltage: 1.1 V to 5.5 V
● Wide VBIAS Supply Operating Range: 3 V to 5.5 V
● Standard VOUT Values: 0.8 V and 1.2 V
● Stable With 10-µF Ceramic Capacitors
● Dropout Voltage of 240 mV (typical) at 3-A Load Current
● Programmable Soft-Start Time
● Precision Output Voltage Across All Line and Load Conditions:
● ±1% VOUT for TJ = 25°C
● ±2% VOUT for 0°C ≤ TJ ≤ +125°C
● ±3% VOUT for –40°C ≤ TJ ≤ +125°C
● Overtemperature and Overcurrent Protection
● Operating Temperature Range: −40°C to +125°C
