Manufacturer Part Number
LP3997MM-3.3
Manufacturer
Texas Instruments
Introduction
The LP3997MM-3.3 is a low-dropout linear regulator optimized for powering low voltage circuits from a single Li-Ion cell or fixed 3.3V input. It is suitable for applications requiring up to 250mA.
Product Features and Performance
Single Li-Ion cell or 3.3V input voltage
Fixed 3.3V output with high accuracy
Up to 250mA output current
Low dropout voltage: 0.4V @ 250mA
Low quiescent current: 100 µA
Good PSRR: 39dB ~ 61dB across 1kHz ~ 10kHz frequency range
Over Temperature and Short Circuit protection
Product Advantages
High efficiency for battery-powered devices
Stable output with low noise
Suitable for RF and digital circuit applications
Minimal external components required
Key Technical Parameters
Voltage Input (Max): 6V
Voltage Output (Min/Fixed): 3.3V
Current Output: 250mA
Voltage Dropout (Max): 0.4V @ 250mA
PSRR: 39dB ~ 61dB (1kHz ~ 10kHz)
Operating Temperature: -40°C ~ 85°C
Quality and Safety Features
Over Temperature Protection
Short Circuit Protection
Compatibility
Surface Mount Technology for PCBs
Compatible with a single Li-Ion cell or a fixed 3.3V input source
Application Areas
Battery-powered devices
Portable and mobile devices
Low-power RF and digital circuits
Product Lifecycle
Obsolete
Users may need to look for replacement or upgrades due to discontinuation
Several Key Reasons to Choose This Product
Optimized for low voltage applications requiring a steady 3.3V
Extremely low quiescent current enhances battery life
Built-in safety features protect against over-temperature and short circuits
Robust PSRR ensures stable operation in noisy environments
Wide operating temperature range suitable for diverse applications
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