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Features
Adjustable VOUT range of 0.80V to 1.8V
Wide VBIAS Supply operating range of 3.0V to 5.5V
Stable with 10µF Ceramic capacitors
Dropout voltage of 240 mV (typical) at 3A load current
Precision VADJ across all line and load conditions:
±1.5% VADJ for TJ = 25°C
±2.0% VADJ for 0°C
≤ TJ
≤ +125°C
±3.0% VADJ for -40°C
≤ TJ
≤ +125°C
Over-Temperature and Over-Current protection
Available in 8 lead PSOP, 7 lead TO-220 and 7 lead TO-263 packages
−40°C to +125°C Operating Junction Temperature Range
Description The LP38853-ADJ 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 part is available in PSOP 8–pin, TO-220 7–pin, and TO-263 7-pin packages.
Dropout Voltage: 240 mV (typical) at 3A load current.
Low Ground Pin Current: 10 mA (typical) at 3A load current.
Soft-Start: Programmable Soft-Start time.
Precision ADJ Voltage: ±1.5% for TJ = 25°C, and ±2.0% for 0°C
≤ TJ
≤ +125°C, across all line and load conditions
Applications
ASIC Power Supplies in:
- Desktops, Notebooks, and Graphics Cards, Servers
- Gaming Set Top Boxes, Printers and Copiers
Server Core and I/O Supplies
DSP and FPGA Power Supplies
SMPS Post-Regulator
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LP38852
