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Product Detailed Parameters
- Description：IC REG LIN 3.3V 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)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.3V @ 300mA
- Current - Output：300mA
- Current - Quiescent (Iq)：50 µA
- Current - Supply (Max)：85 µA
- PSRR：62dB (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 (0.79x0.79)
- Grade：-
- Qualification：-
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Overview
The LD39030SJ33R is a low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed 3.3 V output with a maximum current of 300 mA. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 200 mV at full load. Quiescent current is specified at 40 uA during operation, with power supply rejection typically rated at 62 dB. The component utilizes a FlipChip-4 package and supports an operating temperature range from -40 °C to +125 °C.
Feature Summary
- Integrated soft-start circuitry to manage inrush currents
- Low noise performance suitable for sensitive analog circuits
- Logic-controlled shutdown mode for minimal standby consumption
Applications
- Battery-powered portable electronics
- RF modules requiring clean power rails
- Embedded microcontroller systems
Procurement Notes
Verify the specific suffix 'SJ' indicates the FlipChip-4 packaging variant distinct from standard DFN packages. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design compatibility with ceramic output capacitors as required for stability. Check for end-of-life notices or obsolescence warnings on distributor platforms before finalizing procurement plans.
Selection Notes
Select this regulator when space constraints necessitate a FlipChip-4 footprint over traditional leaded packages. Choose this model for applications requiring low quiescent current alongside moderate output current capabilities. Consider the 3.3 V fixed output if system architecture does not require adjustable voltage references. Evaluate thermal dissipation requirements based on the specific input-to-output voltage differential under expected load conditions.
Part Context
This component belongs to the LD39030 series of ultra-low dropout regulators designed for high efficiency in compact form factors. The SJ suffix specifically denotes the flip-chip configuration, offering reduced parasitic inductance compared to wire-bonded alternatives. This series targets modern mobile and IoT devices where board real estate and power efficiency are critical design parameters.
Replacement Considerations
LD39030DTPU33R offers similar electrical characteristics but utilizes a DFN4 1x1 package instead of FlipChip-4. LD39030SJ10R provides the same package and features but delivers a fixed 1.0 V output. Verify pinout compatibility and thermal pad requirements when substituting these variants.
