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.