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- 制造厂商:AD
- 产品类别:PMIC 和多功能
- 技术类目:降压型稳压器和 LDO
- 功能描述:具 LDO 的三路、单片式降压型稳压器
- (AD代理渠道,提供当日发货、严格的质量标准,满足您的目标价格)
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LT3507A 是一款三路、电流模式、DC/DC 转换器,具有内部电源开关和一个低压差稳压器。开关转换器是能够产生一个 2.7A 输出和两个 1.8A 输出的降压型转换器。所有三个转换器均可同步至单个振荡器。2.7A 输出与另外两个转换器反相运行,从而减小了输入纹波电流。每个稳压器都具有独立的停机和软起动电路,并将在其输出处于调节状态时产生一个电源良好信号,因而简化了电源排序以及与微控制器和 DSP 的连接。
开关频率利用单个电阻器来设定,可调范围为 250kHz 至 2.5MHz。高开关频率允许使用小型电感器和电容器,因而造就了一款非常小巧的三路输出电源。恒定开关频率与低阻抗陶瓷电容器的组合产生了低且可预知的输出纹波。频率折返和热停机功能提供了针对故障状况的保护作用。LT3507A 可提供的输出电流高于 LT3507。
应用
- 汽车
- 工业电源
- 分布式电源调节
- DSP 电源
- 宽输入范围:4V 至 36V
- 具内部电源开关的一个 2.7A 和两个 1.8A 输出开关稳压器
- 具外部晶体管的低压差线性稳压器
- 反相开关操作减小了纹波
- 独立的运行、跟踪 / 软起动和电源良好指示器简化了电源排序
- 采用小型电感器和陶瓷电容器
- 可在整个频率范围内实现同步的可调 (250kHz 至 2.5MHz) 开关频率
- 可由用户来编程的过压和欠压闭锁
- 耐热性能增强型 38 引脚 TSSOP 封装和 5mm x 7mm QFN 封装
LT3507AEFE#PBF,封装:38-Lead TSSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:6.19(100-499个);5.07(1000+个)
LT3507AEFE#TRPBF,封装:38-Lead TSSOP w/ EP,包装形式及数量:卷带,2000,工作温度:-40 to 125C,AD官网报价:6.19(100-499个);5.07(1000+个)
LT3507AEUHF#PBF,封装:38-Lead QFN (5mm x 7mm w/ EP),包装形式及数量:管装,52,工作温度:-40 to 125C,AD官网报价:5.79(100-499个);4.74(1000+个)
LT3507AEUHF#TRPBF,封装:38-Lead QFN (5mm x 7mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:5.79(100-499个);4.74(1000+个)
LT3507AHFE#PBF,封装:38-Lead TSSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 150C,AD官网报价:7.66(100-499个);6.28(1000+个)
LT3507AHFE#TRPBF,封装:38-Lead TSSOP w/ EP,包装形式及数量:卷带,2000,工作温度:-40 to 150C,AD官网报价:7.66(100-499个);6.28(1000+个)
LT3507AHUHF#PBF,封装:38-Lead QFN (5mm x 7mm w/ EP),包装形式及数量:管装,52,工作温度:-40 to 150C,AD官网报价:7.26(100-499个);5.95(1000+个)
LT3507AHUHF#TRPBF,封装:38-Lead QFN (5mm x 7mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 150C,AD官网报价:7.26(100-499个);5.95(1000+个)
LT3507AIFE#PBF,封装:38-Lead TSSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:7.33(100-499个);6.01(1000+个)
LT3507AIFE#TRPBF,封装:38-Lead TSSOP w/ EP,包装形式及数量:卷带,2000,工作温度:-40 to 125C,AD官网报价:7.33(100-499个);6.01(1000+个)
LT3507AIUHF#PBF,封装:38-Lead QFN (5mm x 7mm w/ EP),包装形式及数量:管装,52,工作温度:-40 to 125C,AD官网报价:6.92(100-499个);5.68(1000+个)
LT3507AIUHF#TRPBF,封装:38-Lead QFN (5mm x 7mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:6.92(100-499个);5.68(1000+个)
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DC1781A:LT3507AEFE Demo Board | 7V to 36VIN, VOUT1 = 1.8V @ 2.7A, VOUT2 = 3.3V @ 1.5A, VOUT3 = 5.0V @ 1.8A, VOUT4 = 2.5V @ 0.3A
Demo circuit 1781A is a Triple Monolithic Step-Down Regulator with LDO featuring the LT3507A. The demo circuit is designed for 1.8V, 3.3V, 5.0V and 2.5V outputs from a 7V to 36V input. The current capability of each channel is 2.7A, 1.5A, 1.8A and 0.3A respectively. Independent input voltage, feedback, soft-start and power good pins for each channel simplify complex power supply tracking/sequencing requirements.
All three converters are either synchronized to a common external clock input or single-resistor programmable from 250kHz to 2.5MHz using internal oscillator. At all frequencies, a 180° phase shift between VOUT1 and the other two outputs is maintained, reducing input voltage ripple and component size. Programmable frequency allows for optimization between efficiency and external component size.
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