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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 300MA 4-WLCSP
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR),Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.16V @ 300mA
- Current - Output：300mA
- Current - Quiescent (Iq)：100 µA
- Current - Supply (Max)：250 µA
- PSRR：55dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- 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 LD6836CX4/18P,315 is a fixed positive Low Dropout regulator (LDO) with a nominal output voltage of 1.8 V. It operates within an input voltage range of 2.3 V to 5.5 V and supports a maximum output current of 300 mA. The device features a typical dropout voltage of 90 mV at full load and includes an integrated pull-down switching transistor for auto discharge functionality. It is housed in a WLCSP-4 package measuring 0.76 mm x 0.76 mm with a 0.40 mm pitch.
Feature Summary
- Integrated pull-down switching transistor provides a low-ohmic output state when disabled.
- Ultra-low dropout performance ensures high efficiency across varying load conditions.
- Low quiescent current consumption in shutdown mode enhances power management.
- Built-in over-temperature protection and output current limiter safeguard the circuit.
Applications
- Analog and digital interfaces requiring lower supply voltages in mobile appliances
- Smartphones and mobile phone handsets
- Cordless telephones
- Digital still cameras
- Portable media players
Procurement Notes
Verify the specific suffix '315' against official NXP documentation to confirm tape-and-reel specifications or lot traceability details. Ensure the component matches the WLCSP-4 package dimensions and pinout configuration required by your PCB layout. Confirm RoHS compliance status if environmental regulations apply to your manufacturing process.
Selection Notes
Select this LDO for applications requiring precise 1.8 V regulation with minimal footprint. The pull-down feature is critical for systems needing rapid output discharge upon disable. Verify that the external capacitor ESR remains within specified limits to maintain stability. Consider thermal resistance characteristics if operating near maximum ambient temperature limits.
Part Context
This component belongs to the LD6836 series of ultra-low dropout regulators manufactured by NXP Semiconductors. The series offers various fixed output voltages and packaging options, including SOT753 and WLCSP formats. The CX4 variant specifically targets portable electronics where space constraints are significant, providing robust performance in a miniature form factor.
Replacement Considerations
Compatible substitutes include other LD6836 variants with matching output voltages and package types, such as LD6836CX4/18H for high-ohmic output requirements. Ensure any replacement maintains the same WLCSP-4 footprint and electrical characteristics to guarantee board compatibility without redesign.
