Manufacturer Part Number
LD3985M122R
Manufacturer
stmicroelectronics
Introduction
The LD3985M122R is a low drop-out (LDO) linear voltage regulator designed for power management applications, provided in a SOT-23-5 package.
Product Features and Performance
Positive output configuration with a fixed output voltage of 1.22V.
Supports input voltages up to 6V.
Capable of delivering up to 150mA of output current.
Ultra-low quiescent current of 150µA, enhancing battery life in portable applications.
Enhanced power supply rejection ratio (PSRR) of 60dB to 50dB within the frequency range of 1kHz to 10kHz, ensuring stable output voltage under varying input conditions.
Features enable control for power-saving modes.
Integrated protection features for over-current and over-temperature conditions, enhancing product reliability.
Product Advantages
High efficiency and precision in voltage regulation.
Ultra-low power consumption, ideal for battery-powered devices.
Compact and lightweight design due to its SOT-23-5 package, ideal for space-constrained applications.
High reliability and robustness provided by integrated protection features.
Key Technical Parameters
Voltage Input (Max): 6V
Voltage Output (Min/Fixed): 1.22V
Current Output: 150mA
Current Quiescent (Iq): 150µA
Current Supply (Max): 250µA
PSRR: 60dB ~ 50dB (1kHz ~ 10kHz)
Quality and Safety Features
Over Current Protection
Over Temperature Protection
Operates reliably over a wide temperature range of -40°C to 125°C.
Compatibility
Compatible with a wide range of microcontrollers and digital devices requiring a stable 1.22V power supply.
Application Areas
Portable and battery-powered devices
Microcontroller power supply
Healthcare and medical devices
Industrial automation
Consumer electronics
Product Lifecycle
Currently active product status.
Not nearing discontinuation, ensuring long-term availability.
Information on replacements or upgrades not provided but typically available for active products.
Several Key Reasons to Choose This Product
Exceptional power efficiency, ideal for extending battery life in portable devices.
High PSRR ensuring stable output voltage, vital for sensitive electronics.
Superior protection mechanisms, guaranteeing reliability under adverse conditions.
Wide operating temperature range, suitable for various applications.
Compact package and high integration level ease the design and save space on the PCB.
Active product lifecycle status ensures long-term availability and support.
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