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Product attributes Property Value
Manufacturer National Semiconductor
Product Series
Packaging Bulk |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 15V
Voltage - Output (Min/Fixed) 2.5V
Voltage - Output (Max) -
Voltage Dropout (Max) 1.2V @ 800mA
Current - Output 800mA
Current - Quiescent (Iq) 5 mA
Current - Supply (Max) 10 mA
PSRR 75dB (120Hz)
Control Features -
Protection Features Over Current, Over Temperature
Operating Temperature 0°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case TO-252-3, DPAK (2 Leads + Tab), SC-63
Supplier Device Package TO-252-3

The LM1117DT-2.5 from National Semiconductor is a low-dropout linear regulator offering a fixed 2.5V output with up to 800mA current capability. Its 1.2V dropout voltage at full load and 5 mA quiescent current make it a reliable choice for powering digital cores and memory systems. The TO-252-3 package provides robust thermal handling for demanding environments.

  • High Output Current: 800mA supports multiple loads or high-power ICs.
  • Low Dropout: 1.2V dropout enables operation from 3.3V rails.
  • Stable 2.5V Output: Ideal for DDR memory and FPGA core supplies.
  • Proven Package: TO-252-3 ensures good heat dissipation and mechanical durability.

DDR Memory Power Supplies

Provides a stable 2.5V rail for DDR1/DDR2 memory termination, ensuring reliable data integrity.

FPGA and CPLD Core Voltage

Delivers 2.5V for FPGA core logic, supporting high-speed processing in communication systems.

Analog-to-Digital Converter References

Low noise output at 2.5V serves as a reference for precision ADCs in measurement equipment.

Networking Equipment

Powers switch and router ICs requiring 2.5V logic, maintaining stable operation under load.

Automotive Infotainment

Regulates 2.5V for display controllers and audio DSPs in vehicle entertainment systems.

Q: What is the output voltage of the LM1117DT-2.5?
A: The fixed output voltage is 2.5V.
Q: What is the maximum output current?
A: It can deliver up to 800mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 1.2V at 800mA load.
Q: What is the quiescent current?
A: The quiescent current is 5 mA.
Q: What package is available?
A: It comes in a TO-252-3 (DPAK) package.
Base Product Number : LM1117DT-2.5
2.5V 800mA LDO Linear Regulator Low Dropout National Semiconductor TO-252-3
Q: What is the output voltage of the LM1117DT-2.5?
A: The fixed output voltage is 2.5V.
Q: What is the maximum output current?
A: It can deliver up to 800mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 1.2V at 800mA load.
Q: What is the quiescent current?
A: The quiescent current is 5 mA.
Q: What package is available?
A: It comes in a TO-252-3 (DPAK) package.