Part Number : LM2937IMPX-3.3
Marking : L69B
Function : 400mA and 500mA Voltage Regulator
Package : SOT-223 Type
Maker : National , Texas Instruments
Pinouts : 
Description :
The LM2937IMPX-3.3, LM2937 is a positive voltage regulator capable of supplying up to 500 mA of load current. The use of a PNP power transistor provides a low dropout voltage characteristic.
Features
• Fully Specified for Operation Over −40°C to +125°C
• Output Current in Excess of 500 mA (400mA
for SOT-223 package)
• Output Trimmed for 5% Tolerance Under All
Operating Conditions
• Wide Output Capacitor ESR Range, 0.01Ω up to 5Ω
• Internal Short Circuit and Thermal Overload
Protection
• Reverse Battery Protection
• 60V Input Transient Protection
• Mirror Image Insertion Protection
Official Homepage : https://www.ti.com/product/LM2937
Datasheet PDF Download : 
Others datasheet of same file :
LM2937ES-2.5, LM2937ES-2.5/NOPB, LM2937ES-3.3,
LM2937ES-3.3/NOPB, LM2937ESX-2.5
