 |
Os motores de busca de Datasheet de Componentes eletrônicos |
|
|
Os motores de busca de Datasheet de Componentes eletrônicos |
|
LTC1735 Folha de dados(PDF) 1 Page - Linear Technology |
|
|
|||||||||||||||||||||||||||||
LTC1735 Folha de dados(HTML) 1 Page - Linear Technology |
|
|
1 / 32 page  LTC3728L-1 1 3728l1fc TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION Dual, 550kHz, 2-Phase Synchronous Regulator The LTC®3728L-1 is a dual high performance step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase. The LTC3728L-1 is identical to the LTC3728L except that the LTC3728L-1 lacks the over current latchoff feature. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference and power good output indicator are compatible with future microproces- sor generations, and a wide 4.5V to 28V (30V maximum/ 35V for LTC3728LI-1) input supply range encompasses all battery chemistries. A RUN/SS pin for each controller provides soft-start. Current foldback limits MOSFET dissipation during short- circuit conditions. The FCB mode pin can select among Burst Mode operation, constant frequency mode and continuous inductor current mode or regulate a secondary winding. The LTC3728L-1 includes a power good output pin that indicates when both outputs are within 7.5% of their designed set point. Figure 1. High Efficiency Dual 5V/3.3V Step-Down Converter n Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n OPTI-LOOP® Compensation Minimizes COUT n ±1.5% Output Voltage Accuracy n Power Good Output Voltage Indicator n Phase-Lockable Fixed Frequency 250kHz to 550kHz n Over Current Latchoff Disabled n Wide VIN Range: 4.5V to 28V (35V for LTC3728LI-1) Operation n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Soft-Start Current Ramping n Foldback Output Current Limiting n Output Overvoltage Protection n Low Shutdown IQ: 20μA n 5V and 3.3V Standby Regulators n 3 Selectable Operating Modes: Constant Frequency, Burst Mode® Operation and PWM n 5mm × 5mm QFN and 28-Lead Narrow SSOP Packages n Notebook and Palmtop Computers n Telecom Systems n Portable Instruments n Battery-Operated Digital Devices n DC Power Distribution Systems L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5929620, 6177787, 6144199, 5471178, 5994885, 6100678. + 4.7μF D3 D4 M1 CB1, 0.1μF R2 105k 1% 1000pF L1 3.2μH CC1 220pF 1μF CERAMIC CIN 22μF 50V CERAMIC + COUT1 47μF 6V SP RSENSE1 0.01Ω R1 20k 1% RC1 15k VOUT1 5V 5A M2 CB2, 0.1μF R4 63.4k 1% L2 3.2μH CC2 220pF 1000pF + COUT 56μF 6V SP RSENSE2 0.01Ω R3 20k 1% RC2 15k VOUT2 3.3V 5A TG1 TG2 BOOST1 BOOST2 SW1 SW2 BG1 BG2 SGND PGND SENSE1+ SENSE2+ SENSE1– SENSE2– VOSENSE1 VOSENSE2 ITH1 ITH2 VIN PGOOD INTVCC RUN/SS1 RUN/SS2 VIN 5.2V TO 28V M1, M2: FDS6982S 3728l1 F01 CSS1 0.1μF CSS2 0.1μF LTC3728L-1 PLLIN fIN 500kHz |
Nº de peça semelhante - LTC1735 |
|
Descrição semelhante - LTC1735 |
|
|
Ligação URL |
| ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | Link para a ficha técnica | roca de Link | Lista de Fabricantes 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 |
Portuguese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
