L5970

L5970D UP TO 1A STEP DOWN SWITCHING REGULATOR s s s s s s s s s s s s s UP TO 1A OUTPUT CURRENT OPERATING INPUT VOLTAGE FROM 4.4V TO 36V 3.3V / (±2%) / REFERENCE VOLTAGE OUTPUT VOLTAGE ADJUSTABLE FROM 1.2V TO 35V LOW DROPOUT OPERATION: 100% DUTY CYCLE 250KHz INTERNALLY FIXED FREQUENCY VOLTAGE FEEDFORWARD ZERO LOAD CURRENT OPERATION INTERNAL CURRENT LIMITING INHIBIT FOR ZERO CURRENT CONSUMPTION SINCHRONIZATION PROTECTION AGAINST FEEDBACK DISCONNECTION THERMAL SHUTDOWN SO8 ORDERING NUMBERS: L5970D (SO8) L5970D013TR (T&R) DESCRIPTION The L5970D is a step down monolithic power switching regulator capable to deliver up to 1A at output voltages from 1.2V to 35V. The device uses an internal P-Channel D-MOS transistor (with a typical Rdson of 250mΩ) as switching element to minimize the size of the external components. 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 3.3V VIN = 4.4V to 35V VREF VCC SYNC. 6 8 2 4 INH. 1 OUT L1 33µH D1 STPS2L40U...