Features
n Wide 5V to 32V Input Voltage Range
n Positive or Negative Output Voltage
Programming with a Single Feedback Pin
n Current Mode Control Provides Excellent
Transient Response
n 1.25V reference adjustable version
n Fixed 400KHz Switching Frequency
n Maximum 3A Switching Current
n SW PIN Built in Over Voltage Protection
n Excellent line and load regulation
n EN PIN TTL shutdown capability
n Internal Optimize Power MOSFET
n High efficiency up to 92%
n Built in Frequency Compensation
n Built in Soft-Start Function
n Built in Thermal Shutdown Function
n Built in Current Limit Function
n Available in TO252-5L package
Featuresn Wide 5V to 18V Input Voltage Rangen Positive or Negative Output VoltageProgramming with a Single Feedback Pinn Current Mode Control Provides ExcellentTransient Responsen 1.25V reference adjustable versionn Fixed 400KHz Switching Frequencyn Maximum 2A Switching Currentn SW PIN Built in Over Voltage Protectionn Excellent line and load regulationn EN PIN TTL shutdown capabilityn Internal Optimize Power MOSFETn High efficiency up to 90%n Built in Frequency Compensationn Built in Soft-Start Functionn Built in Thermal Shutdown Function n Built in Current Limit Functionn Available in SOIC-8 package
1,现货特价供应。 LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORSDESCRIPTIONThe UTC LD1117/A is a low dropout, 3-terminal positivevoltage regulator designed to provide output current up to800mA/1A, There are adjustable version (VREF=1.25V) andvarious fixed versions.FEATURES* Low dropout voltage* Suitable for SCSI-2 active termination if VOUT set to 2.85V* Output current up to 0.8A for 1117 and 1.0A for 1117A* Built-in current limit and over temperature protection* Available in ±1%(at 25°C) and 2% in all temperature range* Low current consumption