LT3434 - LT3434是High Voltage 3A, 200kHz Step-Down Switching Regulator with 100μA Quiescent Current
LT3434是Linear公司的一款微功率降压产品，LT3434是High Voltage 3A, 200kHz Step-Down Switching Regulator with 100μA Quiescent Current，本站介绍了LT3434的封装应用图解、特点和优点、功能等，并给出了与LT3434相关的凌力尔特元器件型号供参考。
LT3434 - High Voltage 3A, 200kHz Step-Down Switching Regulator with 100μA Quiescent Current
LT3434 - High Voltage 3A, 200kHz Step-Down Switching Regulator with 100μA Quiescent Current - Linear Technology（凌力尔特）
功能描述
The LT3434 is a 200kHz monolithic buck switching regulator that accepts input voltages up to 60V. A high efficiency 3A, 0.1? switch is included on the die along with all the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability.
Innovative design techniques integrated in a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by employing Burst Mode operation at low currents, utilizing the output to bias the internal circuitry, and by using a supply boost capacitor to fully saturate the power switch. Patented circuitry maintains peak switch current over the full duty cycle range.* Shutdown reduces input supply current to less than 1μA. External synchronization can be implemented by driving the SYNC pin with logic-level inputs. A single capacitor from the CSS pin to the output provides a controlled output voltage ramp (soft-start). The device also has a power good flag with a programmable threshold and time-out, and thermal shutdown protection.
The LT3434 is available in a 16-pin TSSOP package with exposed pad leadframe for low thermal resistance.
特点
Wide Input Range: 3.3V to 60V 3A Peak Switch Current Burst Mode Operation: 100μA Quiescent Current** Low Shutdown Current: IQ < 1μA Power Good Flag with Programmable Threshold Load Dump Protection to 60V 200kHz Switching Frequency Saturating Switch Design: 0.1? Peak Switch Current Maintained Over Full Duty Cycle Range* 1.25V Feedback Reference Voltage Easily Synchronizable Soft-Start Capability Small 16-Pin Thermally Enhanced TSSOP Package应用
High Voltage Power Conversion 14V and 42V Automotive Systems Industrial Power Systems Distributed Power Systems Battery-Powered Systems以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) |
| LT3434EFE | TSSOP-16 | E | $7.50 | $5.25 |
| LT3434EFE#PBF | TSSOP-16 | E | $7.50 | $5.25 |
| LT3434EFE#TR | TSSOP-16 | E | | $5.37 |
| LT3434EFE#TRPBF | TSSOP-16 | E | | $5.37 |
| LT3434IFE | TSSOP-16 | I | $8.63 | $6.04 |
| LT3434IFE#PBF | TSSOP-16 | I | $8.63 | $6.04 |
| LT3434IFE#TR | TSSOP-16 | I | | $6.16 |
| LT3434IFE#TRPBF | TSSOP-16 | I | | $6.16 |
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