- 制造厂商:AD
- 产品类别:PMIC 和多功能
- 技术类目:多拓扑DC/DC
- 功能描述:低 IQ、38V 同步升压 + 降压型控制器
- (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)
LTC7812 是一款高性能同步升压 + 降压型 DC/DC 开关稳压控制器,用于驱动全 N 沟道功率 MOSFET 级。它包含独立的升压和降压控制器,可以调节两个独立的输出或通过级联以从一个输入电压调节一个输出电压,而输入电压可高于、低于、或等于输出电压。该 LTC7812 工作在 4.5V 至 38V 的宽输入电压范围。当从升压稳压器的输出偏置时,LTC7812 在启动后可从输入电源低至 2.5V 运行。该 33μA 的无负载静态电流延长了电池供电系统的工作运行时间。
与传统的降压-升压型稳压器不同,LTC7812 的级联升压 + 降压解决方案具有连续、非脉动、输入和输出电流、可大幅降低电压纹波和 EMI。LTC7812 具有用于升压和降压调节环路的独立反馈和补偿点,从而能进行快速输出瞬态响应,可容易地与外部优化。
Applications
- 汽车和工业电源系统
- 高功率电池供电式设备
- 同步升压和降压控制器
- 当级联,允许 VIN 高于、低于或等于稳压的 VOUT
- 输入骤降 (如冷启动) 低至 2.5V 时输出保持稳压
- 宽偏置输入电压范围:4.5V 至 38V
- 低输入和输出纹波
- 低 EMI
- 快速输出瞬态响应
- 高轻载效率
- 低工作 IQ:33μA (两个通道接通)
- 低工作 IQ:28μA (降压通道接通)
- RSENSE 或无损耗的 DCR 电流检测
- 降压输出电压范围:0.8V ≤ VOUT ≤ 24V
- 升压输出电压高达 60V
- 锁相频率 (75kHz 至 850kHz)
- 小型 32 引脚 5mm x 5mm QFN 封装
LTC7812EUH#PBF,封装:32-Lead QFN (5mm x 5mm x 0.75mm w/ EP),包装形式及数量:管装,73,工作温度:-40 to 125C,AD官网报价:5.41(100-499个);4.47(1000+个)
LTC7812EUH#TRPBF,封装:32-Lead QFN (5mm x 5mm x 0.75mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:5.41(100-499个);4.47(1000+个)
LTC7812HUH#PBF,封装:32-Lead QFN (5mm x 5mm x 0.75mm w/ EP),包装形式及数量:管装,73,工作温度:-40 to 150C,AD官网报价:6.19(100-499个);5.12(1000+个)
LTC7812HUH#TRPBF,封装:32-Lead QFN (5mm x 5mm x 0.75mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 150C,AD官网报价:6.19(100-499个);5.12(1000+个)
LTC7812IUH#PBF,封装:32-Lead QFN (5mm x 5mm x 0.75mm w/ EP),包装形式及数量:管装,73,工作温度:-40 to 125C,AD官网报价:5.8(100-499个);4.79(1000+个)
LTC7812IUH#TRPBF,封装:32-Lead QFN (5mm x 5mm x 0.75mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:5.8(100-499个);4.79(1000+个)
DC2422A-C:LTC7812EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 36V; VBoost = 12V, Vbuck = 12V to 5V @ 8A
Demonstration circuit DC2422A is a step-up + step-down DC/DC converter featuring the LTC7812EUH, a high performance dual output (Boost + Buck) synchronous DC/ DC switching regulator controller. This board has a 4V to 36V input voltage range and three different output configurations. DC2422A-A generates a regulated 12V @ 8A output using the boost and buck converter combination. DC2422A-B provides a quasi-regulated output voltage between 10V and 16V; the circuit steps voltages lower than 10V up to 10V, passes voltages between 10V and 16V, and steps voltage above 16V down to 16V, providing a loosely regulated 12V bus. DC2422A-C boosts the input voltage up to 12V and then steps this voltage down to 5V @ 8A, simulating a power supply designed to provide 5V output power even during cold crank conditions as low as 4V.