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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 1A 6-FLIPCHIP
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：0.5V
- Voltage - Output (Max)：3V
- Voltage Dropout (Max)：0.08V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：50 µA
- Current - Supply (Max)：-
- PSRR：70dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 85°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：6-XFBGA, FCBGA
- Supplier Device Package：6-FlipChip (0.78x1.18)
- Grade：-
- Qualification：-
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Overview
The LD57100JR is a high-accuracy adjustable voltage regulator providing up to 1 A of output current. It utilizes an NMOS pass transistor biased by a dedicated VBIAS pin, enabling ultra-low dropout performance even at minimal input voltages. The device operates with an input voltage range from the nominal output voltage up to 5.5 V, while the bias supply accepts 3.0 V to 5.5 V. It features a logic-controlled electronic shutdown mode with standby current below 0.1 µA and includes internal thermal protection and short-circuit limiting. The component is housed in a compact Flip Chip6 package measuring 0.8 x 1.2 mm.
Feature Summary
- Ultra-low dropout voltage achieved through dedicated gate biasing of the NMOS pass transistor
- Logic-controlled electronic shutdown function for deep power saving applications
- Integrated thermal shutdown and internal current limit protection mechanisms
- Output active discharge MOSFET for rapid capacitor discharge upon disable
Applications
- Smartphones
- Cameras
- Low voltage post regulation
- Low noise post regulation
Procurement Notes
Verify the specific ordering code suffix against the manufacturer's official datasheet to confirm the adjustable version designation. Ensure that the procurement documentation explicitly references the Flip Chip6 package dimensions and the correct part marking code 'JA' to avoid substitution errors during assembly.
Selection Notes
Select this component when space constraints require a sub-millimeter footprint combined with high current capability. The dedicated bias pin allows operation with very low headroom between input and output voltages. Designers must ensure the external ceramic capacitors maintain stability across the full operating temperature range to prevent oscillation.
Part Context
This device belongs to the LD57100 series of ultra-low-dropout linear regulators manufactured by STMicroelectronics. The series is engineered for battery-operated applications requiring high efficiency and precise voltage regulation. The adjustable variant allows flexible output voltage setting via external resistors, distinguishing it from fixed-output counterparts within the same family.
Replacement Considerations
LD57100J100R
FAQ
How is the output voltage determined for the LD57100JR?
The output voltage is set using two external resistors connected to the FB pin according to the formula VOUT = VREF × (1 + R1/R2), where R2 must not exceed 500 kΩ.
What is the purpose of the VBIAS pin?
The VBIAS pin supplies the internal driving and control circuitry. It ensures proper biasing of the N-channel power element, allowing the device to maintain ultra-low dropout performance at low input voltages.
Does the LD57100JR support fast shutdown?
Yes, the device includes an output active discharge function. When the EN pin goes low, an internal MOSFET activates to quickly discharge the output capacitor.
