L5973D013TR Description
Depending on the application requirements, the L5973D step-down monolithic power switching regulator can send more than 2 A of DC current to the load with a minimum switch current limit of 2.5 A. From 1.235 V to 35 V can be selected as the output voltage. The high current level is also made possible by an exposed-frame SO8 package, which allows for a reduction in Rth(j-amb) to about 40 °C/W.
To reduce the size of the external components, the device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 m) as the switching element. 250 kHz is the fixed switching frequency set by an internal oscillator.
L5973D013TR Features
2.5 A internal switch
Operating input voltage from 4 V to 36 V
3.3 V / (±2%) reference voltage
Output voltage adjustable from 1.235 V to 35 V
Low dropout operation: 100 % duty cycle
250 kHz internally fixed frequency
Voltage feedforward
Zero load current operation
Internal current limiting
Inhibit for zero current consumption
Synchronization
Protection against feedback disconnection
Thermal shutdown
L5973D013TR Applications
Consumer: STB, DVD, TV, VCR, car radio, LCD monitors
Networking: XDSL, modems, DC-DC modules
Computer: printers, audio/graphic cards, optical storage, hard disk drive
Industrial: changers, car battery, DC-DC converters
