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Product Detailed Parameters
- Description：IC REG LIN 1.2V 300MA 4-FLIPCHIP
- 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)：1.2V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：300mA
- Current - Quiescent (Iq)：45 µA
- Current - Supply (Max)：-
- PSRR：70dB ~ 65dB (1kHz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Soft Start
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：4-UFBGA, FCBGA
- Supplier Device Package：4-FlipChip (.69x.69)
- Grade：-
- Qualification：-
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Overview
The LD39130SJ12R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics. It provides a stable 1.2 V output with a maximum continuous current of 300 mA. The device operates within an input voltage range of 1.4 V to 5.5 V and maintains a typical dropout voltage of 300 mV at full load. Key electrical specifications include a quiescent current of 45 uA, power supply rejection ratio (PSRR) of 70 dB, and line regulation of 0.02 %/V. The unit features a FlipChip-4 package and supports an operating temperature range from -40 °C to +125 °C.
Feature Summary
- Ultra-low dropout voltage capability for efficient battery-powered operation
- Low quiescent current consumption to extend system runtime
- High power supply rejection ratio for clean output in noisy environments
- Integrated thermal and short-circuit protection mechanisms
Applications
- Portable consumer electronics requiring stable low-voltage rails
- Battery-operated embedded systems with strict power constraints
- Noise-sensitive analog or RF circuit sections
- General-purpose power management in compact form factors
Procurement Notes
Verify component authenticity through authorized channels due to potential counterfeit risks. Confirm RoHS compliance status via official datasheets before integration. Check for obsolescence notices as availability may vary across regions. Ensure proper handling procedures for the FlipChip-4 package during assembly to prevent damage.
Selection Notes
Select this regulator when a fixed 1.2 V output is required with minimal voltage drop under high load conditions. Consider its low quiescent current for applications prioritizing energy efficiency over extended periods. Evaluate the FlipChip-4 footprint against available PCB space constraints. Compare PSRR performance against specific noise immunity requirements of the target application.
Part Context
This component belongs to the LD39130S series of low-dropout regulators designed for ultra-thin, high-impact applications. It represents STMicroelectronics' focus on miniaturized power solutions compatible with modern surface-mount technologies. The series targets industries demanding reliable voltage regulation in constrained physical spaces.
Replacement Considerations
LD39130SJ30R/F serves as a functional substitute offering identical electrical characteristics but with a fixed 3.0 V output instead of 1.2 V. Verify pin compatibility and thermal performance when substituting. Ensure the application does not strictly require the original 1.2 V rail.
