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Product Detailed Parameters
- Description：IC REG LINEAR 2.5V 500MA 6-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.4V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：50 µA
- Current - Supply (Max)：200 µA
- PSRR：65dB ~ 62dB (1kHz ~ 10kHz)
- Control Features：Enable, Power Good
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：6-VDFN Exposed Pad
- Supplier Device Package：6-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LD39050PU25R is a fixed-output low dropout linear regulator from STMicroelectronics, delivering a guaranteed 500 mA output current. It operates within an input voltage range of 1.5 V to 5.5 V and provides a fixed 2.5 V output. The device features ultra-low quiescent current, with typical values of 50 µA at no load and 200 µA under full load. It maintains stability when used with a single 1 µF ceramic output capacitor. Key electrical parameters include a maximum dropout voltage of 400 mV at 500 mA and a power supply rejection ratio (PSRR) ranging from 65 dB at 1 kHz to 62 dB at 10 kHz.
Feature Summary
- Ultra-low quiescent current operation suitable for battery-powered applications
- Stable with minimal external components using only a 1 µF ceramic capacitor
- Integrated protection against overcurrent, thermal overload, and short circuits
Applications
- Battery-operated mobile devices
- Portable hard disk drives
- Low-power embedded systems
Procurement Notes
Verify the specific suffix PU25R to confirm the fixed 2.5 V output voltage variant. Ensure the package matches the required 6-DFN footprint. Confirm RoHS compliance status if environmental regulations apply to your manufacturing process. Check for any recent PCN updates regarding packaging or material changes before finalizing procurement.
Selection Notes
Select this component when a stable 2.5 V rail is required with high efficiency under moderate loads. It is appropriate for designs prioritizing low standby power consumption. Consider the 1.5 V minimum input voltage constraint for battery discharge profiles. Verify that the 500 mA current capability meets the peak demand of the downstream circuitry without exceeding thermal limits.
Part Context
This part belongs to the LD39050 series of ultra-low dropout LDO regulators designed for low noise and low current consumption. The series offers various fixed and adjustable output voltages in compact DFN packages. It is engineered for portable electronics where space and power efficiency are critical constraints.
Replacement Considerations
Direct substitutes include other LD39050 variants with different fixed output voltages such as LD39050PU33R (3.3 V) or LD39050PUR (adjustable). Ensure pinout compatibility and thermal performance match the original design requirements.
