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Product Detailed Parameters
- Description：IC REG LINEAR 3.1V 150MA 4-UDFN
- 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)：3.1V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.25V @ 150mA
- Current - Output：150mA
- Current - Quiescent (Iq)：35 µA
- Current - Supply (Max)：150 µA
- PSRR：75dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current, Transient Voltage
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：4-UDFN Exposed Pad
- Supplier Device Package：4-UDFN (1.0x1.0)
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Overview
The LD6805K/31H is a fixed positive Low Dropout (LDO) regulator providing a nominal output voltage of 3.1 V. It operates within an input voltage range of 2.3 V to 5.5 V and supports a maximum output current of 150 mA. The device features a dropout voltage of 250 mV at full load and delivers a Power Supply Rejection Ratio (PSRR) of 75 dB at 1 kHz. Packaged in a compact 1x1 mm DFN-4 (SOT1194-1), it includes integrated overcurrent protection, ESD protection up to 6 kV HBM, and a high-ohmic disabled state.
Feature Summary
- Ultra-high power supply rejection ratio for effective noise suppression
- Compact plastic thermal enhanced ultra thin small outline package
- Integrated overcurrent protection and electrostatic discharge safeguards
- High-ohmic output state when the enable pin is deactivated
Applications
- Powering analog and digital interfaces in mobile appliances
- Supplying portable media players and personal navigation devices
- Providing lower than standard supply voltages for smart phones
- Powering digital still cameras and cordless telephones
Procurement Notes
Verify the specific suffix 'H' indicates the high-ohmic output configuration rather than the pull-down variant. Confirm the package designation matches SOT1194-1 dimensions. Ensure application circuits include the required external load capacitance to maintain stability and meet specified ripple rejection performance under all operating conditions.
Selection Notes
Select this component for designs requiring precise 3.1 V regulation with minimal footprint constraints. Consider the 150 mA current limit and 250 mV dropout characteristics against the available input voltage headroom. Evaluate the need for the high-ohmic disabled state versus auto-discharge functionality based on system power management requirements.
Part Context
This part belongs to the LD6805 series of low-dropout regulators manufactured by NXP Semiconductors. The series is designed for portable applications demanding miniaturization and superior operating stability. Variants are available with different fixed output voltages ranging from 1.2 V to 3.6 V, sharing the same physical package and core electrical architecture.
Replacement Considerations
LD6805K/31P
FAQ
What is the output state of the LD6805K/31H when disabled?
When the enable pin is set to a low level, the LD6805K/31H enters a high-ohmic state at the output pin.
Does the LD6805K/31H support auto-discharge functionality?
No, the 'H' suffix denotes a high-ohmic output state. Auto-discharge functionality is only available in the 'P' suffix variants.
