Manufacturer Part Number
LD3985M47R
Manufacturer
stmicroelectronics
Introduction
Low Dropout Voltage Regulator suitable for applications requiring low voltage power supply
Product Features and Performance
Low dropout voltage of 0.1V at 150mA load
Fixed output voltage of 4.7V
Single regulator design for simplicity
Low quiescent current of 150 µA
High PSRR of 60dB at 1kHz to 50dB at 10kHz ensuring good noise rejection
Over current and over temperature protection for safety and reliability
Wide operating temperature range from -40°C to 125°C
Product Advantages
Ultra low-dropout for efficient use in battery-powered devices
Stable output with low output voltage variability
Robust protection features increase product lifespan
High PSRR minimizes voltage fluctuations due to varying loads
Low quiescent current extends battery life in portable applications
Key Technical Parameters
Voltage Input (Max): 6V
Voltage Output (Min/Fixed): 4.7V
Current Output: 150mA
Voltage Dropout (Max): 0.1V @ 150mA
PSRR: 60dB ~ 50dB (1kHz ~ 10kHz)
Operating Temperature: -40°C ~ 125°C
Quality and Safety Features
Protects against over current conditions
Thermal shutdown feature to prevent overheating
Compatibility
Control Feature: Enable
Output Configuration: Positive
Output Type: Fixed
Mounting Type: Surface Mount
Package/Case: SC-74A, SOT-753
Device Package: SOT-23-5
Application Areas
Battery-powered devices
Portable electronics
Microcontroller power supplies
Low power instrumentation
Product Lifecycle
Active status, not nearing discontinuation
Availability of replacements or upgrades not specified
Several Key Reasons to Choose This Product
Efficient power conversion for prolonged battery life
Minimal dropout allows for stable operation close to battery voltage
Broad compatibility with surface mount technology for easy integration
Reliable operation even in extreme temperature conditions
Excellent noise suppression capabilities suitable for sensitive applications
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