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1FEATURES

2? Operating Input Supply Range: +2.7V to + 5.5V

? Maximum Continuous Output Current: 1A

? Preset Output Voltage of 2.5V, or Adjustable

Output Voltage From 0.8V to 5.0V

? Pre-Set Output Initial V OUT Tolerance ±0.5%

? Adjustable VREF Tolerance of ±0.75%

? PSRR of 50dB at 100kHz

? Low 200 mV Dropout at 1A

? Typical 2 μA Supply Current in Shutdown

Mode

? Adjustable Soft-Start for Output Current

? Fold-Back Output Current Limit

? Stable With Ceramic, Tantalum, or Aluminum

Capacitors

? Stable With 1uF Input/Output Capacitors

? Thermal Shutdown

? 16-pin HTSSOP Package

APPLICATIONS

? DSA, FPGA and MCU Power Supply

? SMPS Post-Regulator

? Applications Requiring Sequencing

? Gibabit SERDES Termination Supply

DESCRIPTION

The LP38869 low-dropout linear regulator operates

with an input voltage supply from +2.7V to +5.5V

input, and delivers a specified 1A load current with a

low 200 mV dropout. The high 50 dB PSRR at 100

kHz results from a high gain control loop that also

yields excellent transient response. Coupled with a

high accuracy output voltage, ±0.75 % over

temperature, the LP38869 is an ideal power supply

for FPGAs, DSPs or MCUs. Output voltage is preset

at +2.5V, or may be adjustable between +0.8V to +5V

with an external resistor divider.

The LP38869 only needs 1 μF output capacitance for

stability. The FlexCap compensation allows the use of

any type of output capacitor, regardless of ESR.

Other features include: Soft-Start; delayed reset

output; low-power shutdown; short-circuit protection;

and thermal shutdown protection

Ground Pin Current: Typically less than 1 mA at 1A

load

Shutdown Mode: Typically 2 μA quiescent current

when the SHDN pin is pulled low.

Simplified Compensation: Stable with any type of

output capacitor.