STMicroelectronics L5973D
The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5 A so it is able to deliver more than 2 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the Rth(j-amb) down to approximately 40°C/W.| Part No. | L5973D |
|---|---|
| Datasheet | L5973D Download |
| Manufacturer |  STMicroelectronics |
| Description | 2.5A switch step down switching regulator |
| Buy | Stock & Price |
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
APPLICATIONS
● Consumer: STB, DVD, TV, VCR, car radio, LCD monitors Datasheet - production data● Networking: XDSL, modems, DC-DC modules
● Computer: printers, audio/graphic cards, optical storage, hard disk drive
● Industrial: changers, car battery, DC-DC converters
DESCRIPTION
The device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications.
