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Product Detailed Parameters
- Description：IC REG LIN 1.2V 150MA 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：150mA
- Current - Quiescent (Iq)：50 µA
- Current - Supply (Max)：70 µA
- PSRR：74dB ~ 67dB (1kHz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：4-UFBGA, FCBGA
- Supplier Device Package：4-FlipChip (0.79x0.79)
- Grade：-
- Qualification：-
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Overview
The LD39115J12R is a fixed-output linear low-dropout regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 1.2 V with a maximum continuous output current of 150 mA. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 80 mV at 100 mA load. Quiescent current is specified at 50 µA, with a maximum supply current of 70 µA. Power supply rejection ratio ranges from 67 dB to 74 dB between 1 kHz and 10 kHz. The component utilizes a 4-FlipChip package measuring 0.79x0.79 mm and supports operation across a temperature range of -40°C to +125°C.
Feature Summary
- Ultra-low quiescent current design optimized for battery-powered applications
- Logic-controlled electronic shutdown function enabling deep sleep modes
- Integrated short-circuit constant current limiting and thermal protection mechanisms
Applications
- Low power portable consumer electronics
- Battery-operated sensor nodes
- Medical and wellness devices
Procurement Notes
Verify the obsolete status of this part number before procurement planning. Confirm availability through authorized distributors or secondary markets. Ensure substitute components meet all electrical specifications and physical footprint requirements. Check for RoHS compliance documentation. Validate lead times as standard delivery periods may be extended due to discontinuation.
Selection Notes
Select this component for designs requiring a compact form factor and stable 1.2 V rail. Verify that the application load does not exceed the 150 mA limit. Ensure input voltage remains within the 1.5 V to 5.5 V operational window. Consider the flip-chip packaging constraints during PCB layout. Evaluate thermal dissipation capabilities under maximum load conditions.
Part Context
This regulator belongs to the LD39115 family of low-noise, low-quiescent-current LDOs. The series offers various fixed output voltages and adjustable options. The J suffix indicates the specific flip-chip package variant. This family targets space-constrained, energy-efficient systems requiring clean power supplies.
Replacement Considerations
STMicroelectronics recommends the LD39130SJ12R as a replacement. Verify pin compatibility and electrical parameter alignment. Assess if the higher current capability of the substitute affects thermal management.
