DESCRIPTION
The output voltage can be set from 1.235V to 35V. An internal oscillator fixes the switching frequency at 250KHz. Having a minimum input voltage of 4.4V only, it is particularly suitable for 5V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection. APPLICATIONS
: s CONSUMER: STB, DVD, TV, VCR,CAR RADIO, LCD MONITORS s NETWORKING: XDSL, MODEMS,DC-DC MODULES s COMPUTER: PRINTERS, AUDIO/GRAPHIC CARDS, OPTICAL STORAGE, HARD DISK DRIVE s INDUSTRIAL: CHARGERS, CAR BATTERY DC-DC CONVERTERS TEST APPLICATION CIRCUIT VIN = 4.4V to 35V VCC OUT L1 33µH D1 STPS2L40U 7 5 FB GND R3 4.7K R2 3.3K VOUT=3.3V 8 1 C1 10µF 35V CERAMIC COMP C4 22nF C3 220pF L5972D 4 6 2 3 R1 5.6K C2 100µF 10V D03IN1436 May 2003 1/10 L5972D PIN CONNECTION OUT GND GND COMP 1 2 3 4 D02IN1367 8 7 6 5 VCC GND GND FB PIN DESCRIPTION
N° 1 2,3,6,7 4 5 8 Pin OUT GND COMP FB VCC Regulator Output. Ground.
STMicroelectronics
