 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LT3972 Datasheet(PDF) 1 Page - Linear Technology |
|
|
|||||||||||||||||||||||||||||
LT3972 Datasheet(HTML) 1 Page - Linear Technology |
|
|
1 / 24 page  LT3972 1 3972f 33V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75µA Quiescent Current The LT ®3972isanadjustablefrequency(200kHzto2.4MHz) monolithic buck switching regulator that accepts input voltages up to 33V (62V Maximum). A high efficiency 95mΩ switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. In addition, the LT3972 can fur- ther enhance low output current efficiency by drawing bias current from the output when VOUT is above 3V. Shutdown reduces input supply current to less than 1μA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. The LT3972 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance. ■ Automotive Battery Regulation ■ Distributed Supply Regulation ■ Industrial Supplies ■ Wall Transformer Regulation ■ Wide Input Range: Operation from 3.6V to 33V Over-Voltage Lockout Protects Circuits Through 62V Transients ■ 3.5A Maximum Output Current ■ Low Ripple (<15mVP-P) Burst Mode ® Operation: IQ = 75μA at 12VIN to 3.3VOUT ■ Adjustable Switching Frequency: 200kHz to 2.4MHz ■ Low Shutdown Current: IQ < 1μA ■ Integrated Boost Diode ■ Synchronizable Between 250kHz to 2MHz ■ Power Good Flag ■ Saturating Switch Design: 95mΩ On-Resistance ■ Output Voltage: 0.79V to 30V ■ Thermal Protection ■ Soft-Start Capability ■ Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages 5V Step-Down Converter SW FB VC PG RT VIN BD VIN 6.3V TO 33V TRANSIENT TO 62V VOUT 5V 3.5A 10μF 0.47μF 680pF 47μF 100k 15k 63.4k 4.7μH 536k GND OFF ON LT3972 3680 TA01 RUN/SS BOOST SYNC Efficiency , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. OUTPUT CURRENT (A) 00.5 50 70 100 1 2 2.5 3680 TA01a 60 90 80 1.5 3 3.5 VIN = 12V VIN = 30V VOUT = 5V L = 4.7μH f = 600kHz VIN = 24V TYPICAL APPLICATION DESCRIPTION FEATURES APPLICATIONS |
Similar Part No. - LT3972 |
|
Similar Description - LT3972 |
|
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
