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Product Detailed Parameters
- Description：IC REG LINEAR 1.2V 150MA 4-WLCSP
- Series：-
- Mfr：NXP USA Inc.
- Package：Bulk
- 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)：0.075V @ 150mA
- Current - Output：150mA
- Current - Quiescent (Iq)：100 µA
- Current - Supply (Max)：250 µA
- PSRR：55dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Transient Voltage
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：4-XFBGA, WLCSP
- Supplier Device Package：4-WLCSP (0.76x0.76)
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Overview
The LD6816CX4/12P,315 is a fixed-output Low DropOut (LDO) regulator from NXP Semiconductors. It provides a nominal output voltage of 1.2 V with a maximum output current rating of 150 mA. The device operates within an input voltage range of 2.3 V to 5.5 V and features a typical dropout voltage of 45 mV at full load. It utilizes a WLCSP4 package with a 0.4 mm pitch and dimensions of 0.76 mm x 0.76 mm. Key electrical characteristics include a quiescent current of 0.1 µA in shutdown mode, 30 µV RMS output noise, and 55 dB PSRR at 1 kHz. The part includes over-temperature protection, output current limiting, and an integrated pull-down transistor for auto-discharge functionality.
Feature Summary
- Integrated pull-down switching transistor providing a low-ohmic output state when disabled
- Ultra-low dropout performance with minimal power consumption
- Low noise operation suitable for sensitive analog and digital interfaces
- Compact wafer-level chip-scale package optimized for component miniaturization
Applications
- Smart phones and mobile phone handsets
- Cordless telephones
- Digital still cameras
- Mobile internet devices
- Portable media players
Procurement Notes
Verify the specific suffix '315' against official documentation to confirm reel packaging specifications. Confirm RoHS compliance status as indicated in the datasheet. Ensure the ordering code matches the required 1.2 V fixed output variant. Check for availability constraints or end-of-life notices associated with this specific manufacturer number.
Selection Notes
Select this component for applications requiring precise 1.2 V regulation in space-constrained portable electronics. The auto-discharge feature distinguishes it from high-ohmic variants, ensuring rapid output discharge upon shutdown. Verify that the external load capacitance meets the minimum stability requirements specified in the application information section.
Part Context
This device belongs to the LD6816 series of ultra-low dropout regulators manufactured by NXP Semiconductors. The series offers various fixed output voltages ranging from 1.2 V to 3.6 V. The CX4 designation indicates the WLCSP4 package format. The 'P' suffix specifically denotes the version equipped with the pull-down auto-discharge function, differentiating it from the 'H' high-ohmic variant.
Replacement Considerations
LD6816CX4/12H: High-ohmic output variant without auto-discharge.
FAQ
What is the behavior of the output pin when the enable signal is low?
The LD6816CX4/12P contains a pull-down switching transistor that provides a low-ohmic output state, effectively discharging the output voltage when disabled.
Does this regulator require an external capacitor for stability?
Yes, the device requires an external load capacitance of at least 0.7 µF to guarantee stable regulator behavior.
