L5970D013TR ,UP TO 1A STEP DOWN SWITCHING REGULATORL5970DUP TO 1A STEP DOWN SWITCHING REGULATOR■ UP TO 1A OUTPUT CURRENT■ OPERATING INPUT VOLTAGE FROM ..
L5971 ,1.5A STEP DOWN SWITCHING REGULATORBLOCK DIAGRAMVCC5THERMAL VOLTAGESSHUTDOWN MONITORCBOOTCHARGE2INTERNAL INTERNALSS_INH INHIBIT SOFTST ..
L5971D ,1.5A STEP DOWN SWITCHING REGULATORELECTRICAL CHARACTERISTICS (Tj = 25°C, Cosc = 2.7nF, Rosc = 20kΩ, VCC = 12V, unless other-wise spec ..
L5972D ,UP TO 2A STEP DOWN SWITCHING REGULATORapplications.DRIVEPulse by pulse current limit with the internal frequen-■ INDUSTRIAL: CHARGERS, CA ..
L5972D013TR ,2A SWITCH STEP DOWN SWITCHING REGULATORL5972D2A SWITCH STEP DOWN SWITCHING REGULATOR■ 2A INTERNAL SWITCH■ OPERATING INPUT VOLTAGE FROM 4.4 ..
L5972D013TR ,2A SWITCH STEP DOWN SWITCHING REGULATORapplications.DRIVEPulse by pulse current limit with the internal frequen-■ INDUSTRIAL: CHARGERS, CA ..
LC03-3.3.TB , Low Capacitance 3.3 Volt TVS for High Speed Interfaces
LC036 ,Low Capacitance Surface Mount TVS for High-Speed Data InterfacesEFT, and lighting.
LC03-6 ,Low Capacitance Surface Mount TVS for High-Speed Data InterfacesMAXIMUM RATINGSRating Symbol Value UnitPeak Power Dissipation P 2000 Wpk8 x 20 S @ T = 25°C (Note ..
LC03-6R2 ,Low Capacitance Surface Mount TVS for High-Speed Data Interfaces2V , REVERSE VOLTAGE (V)% OF PEAK PULSE CURRENTZV , CLAMPING VOLTAGE (V)CI , REVERSE LEAKAGE (A)RL ..
LC03-6R2G , Low Capacitance Surface Mount TVS for High-Speed Data Interfaces
LC04-6 , Dual Low Capacitance TVS Array for Telecom LineCard Applications
L5970-L5970D013TR
UP TO 1A STEP DOWN SWITCHING REGULATOR
1/10
L5970DSeptember 2003 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
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: CHARGERS, CAR BATTERY
DC-DC CONVERTERS
DESCRIPTIONThe 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 ex-
ternal 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 fre-
quency modulation offers an effective constant
current short circuit protection.
UP TO 1A STEP DOWN SWITCHING REGULATOR
TEST APPLICATION CIRCUIT
L5970D 2/10
PINS CONNECTION (Top View)
PINS FUNCTION
THERMAL DATA(*) Package mounted on board
ABSOLUTE MAXIMUM RATINGS
3/10
L5970D
ELECTRICAL CHARACTERISTCS (Tj = 25°C, VCC = 12V, unless otherwise specified.)(*) Specification Referred to Tj from -40 to +125°C (1).
Note (1): Specification over the -40 to +125 Tj Temperature range are assured by design, characterization and statistical correlation.
Note (2): Guaranteed by design.
L5970D 4/10
Figure 1. Junction Temperature vs. Output
Current
Figure 2. Junction Temperature vs. Output
Current
Figure 3. Junction Temperature vs. Output
Current
Figure 4. Load Regulation
Figure 5. Line Regulation
Figure 6. Output Voltage vs. Junction
Temperature
5/10
L5970D
Figure 7. Quiescent Current vs. Junction
Temperature
Figure 8. Shutdown Current vs.Junction
Temperature
Figure 9. Switching Frequency vs.Junction
Temperature
L5970D 6/10
Figure 10. Demoboard schematic
Part list demoboard
Figure 11. Efficiency vs. Output Current Figure 12. Efficiency vs. Output Current
