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首页 > 产品中心 > MCU存储ADC时钟数据线 > PMU >CXPC3346同步buck是高效的单片同步buck稳压器采用恒定频率电流模式结构轻载高效PFM模式励磁涌流限制及软起动每个通道输出电流为0.5A输入电压2-6V 输出电压1.2V~4.5V
CXPC3346同步buck是高效的单片同步buck稳压器采用恒定频率电流模式结构轻载高效PFM模式励磁涌流限制及软起动每个通道输出电流为0.5A输入电压2-6V 输出电压1.2V~4.5V
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CXPC3346是一个功率管理单元(PMU),具有1个同步降压和2个CMOS低损耗稳压器,为降压输出提供1.5A的最大电流,为每个LDO的输出提供0.5A的最大电流。同步buck是一种高效的单片同步buck稳压器,采用恒定频率、电流模式结构。该设备有可调版本。空载供电电流为40uA,停机时降至<1uA。2.5V至6V的输入电压范围使CXPC3346非常适合单锂离子电池供电的应用。100%占空比提供低漏失操作,延长便携式系统的电池寿命。PWM/PFM模式操作为噪声敏感应用提供非常低的输出纹波电压。开关频率内部设置为1.5MHz,允许使用小型表面贴装电感和电容器。低输出电压很容易支持与0.6V反馈参考电压。
两个LDO都是低电压降稳压器,最大输出电流为0.5A。在0.5A负载电流下的典型漏失电压为0.8V,具有良好的负载和线路暂态响应,良好的温度特性,可以保证芯片和电力系统的稳定性。通过微调,每个通道的输出精度设置在2%以内。典型的LDO输出电压:VO1=2.8V,VO2=1.8V。每0.1V步进可提供1.2V~4.5V范围内的其它固定电压。它也可以根据命令定制。LDOs还可以在2V到6V的宽输入电压下工作,并提供折叠短路保护和输出限流功能。
高效:高达96%
可提供1.5A
1.5MHz开关频率
不需要外部肖特基二极管
低辍学率100%工作
轻载高效PFM模式
过热保护
低静态电流:40μA
短路保护
励磁涌流限制及软起动
LDO公司
每个通道的最大输出电流为0.5A
输入电压范围:2-6V
输出电压范围:1.2V~4.5V(每0.1V步按指令定制)
低功耗:40uA(典型)
低输出噪声(47uVRMS)
低压差:
600毫伏,IO1=500毫安,VO1=2.8伏
IO2=500mA时800mV,VO2=1.8V
高纹波抑制:65dB@1KHz(典型)
低温系数:±100ppm/℃
优良线路调节率:0.05%/V
高精度:±2%
输出电流限制
折回短路电流

CXPC3346同步buck是高效的单片同步buck稳压器采用恒定频率电流模式结构轻载高效PFM模式励磁涌流限制及软起动每个通道输出电流为0.5A输入电压2-6V 输出电压1.2V~4.5V
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  1. 1.产品概述       2.产品特点     Rjj嘉泰姆

  2. 3.应用范围       4.技术规格书下载(PDF文档)Rjj嘉泰姆

  3. 5.产品封装       6.电路原理图  Rjj嘉泰姆
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The CXPC3346 is a power management unit (PMU), with 1 synchronous Buck and 2 CMOS low-dropout regulators that delivers a maximum current of 1.5A for Buck’s output and a maximum current of 0.5A for each individual LDO’s output.Rjj嘉泰姆
The synchronous buck is a high-efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version. Supply current with no load is 40uA and drops to <1uA in shutdown. The 2.5V to 6V input voltage range makes the CXPC3346 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM/PFM mode operation provides very low output ripple voltage for noise sensitive applications. Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. Low output voltages are easily supported with the 0.6V feedback reference voltage.Rjj嘉泰姆
Each of the 2 LDOs is low-dropout regulator that delivers a maximum current of 0.5A individual output. Typical dropout voltage at 0.5A load current is 0.8V. They have excellent load and line transient response and good temperature characteristics, which can assure the stability of chip and power system. The output accuracy of each channel is set within 2% by trimming.Rjj嘉泰姆
Typical LDO output voltage: VO1=2.8V, VO2=1.8V.Rjj嘉泰姆
Other fixed voltage can be provided in the range of 1.2V~4.5V every 0.1V step. It also can be customized on command. LDOs can also work under a wide input voltage ranging from 2V to 6V. They can provide foldback short-circuit protection and output current limit function.Rjj嘉泰姆
CXPC3346 is available in lead (Pb)-free ESOP-8(with exposed pad for heat dissipation) package.

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High Efficiency : Up to 96%Rjj嘉泰姆
Capable of Delivering 1.5ARjj嘉泰姆
1.5MHz Switching FrequencyRjj嘉泰姆
No External Schottky Diode NeededRjj嘉泰姆
Low dropout 100% Duty operationRjj嘉泰姆
PFM Mode for High Efficiency in Light LoadRjj嘉泰姆
Over temperature ProtectedRjj嘉泰姆
Low Quiescent Current: 40μARjj嘉泰姆
Short Circuit ProtectionRjj嘉泰姆
Inrush Current Limit and Soft StartRjj嘉泰姆
LDORjj嘉泰姆
Max output current for each channel is 0.5ARjj嘉泰姆
Input voltage range: 2 – 6VRjj嘉泰姆
Output voltage range: 1.2V~4.5V (customized on command every 0.1V step)Rjj嘉泰姆
Low power consumption: 40uA (Typ.)Rjj嘉泰姆
Low output noise (47uVRMS)Rjj嘉泰姆
Low dropout voltage:Rjj嘉泰姆
600mV@IO1=500mA, VO1=2.8VRjj嘉泰姆
800mV@IO2=500mA, VO2=1.8VRjj嘉泰姆
High ripple rejection:65dB@1KHz (Typ.)Rjj嘉泰姆
Low temperature coefficient: ±100ppm/CRjj嘉泰姆
Excellent line regulation: 0.05%/VRjj嘉泰姆
Highly accurate: ±2%Rjj嘉泰姆
Output current limitRjj嘉泰姆
Fold-back short circuit current
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   Distributed Power SystemsRjj嘉泰姆
 Digital Set Top BoxesRjj嘉泰姆
 Flat Panel Television and MonitorsRjj嘉泰姆
 Wireless and DSL ModemsRjj嘉泰姆
 Power source for cellular phones and various kind of PCSsRjj嘉泰姆
 Battery Powered equipment
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     需要详细的PDF规格书请扫一扫微信联系我们,还可以获得免费样品以及技术支持Rjj嘉泰姆

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源管理,可定制(PMU)
Part No. Configuration MODE VIN IQ FOSC Eff. FB Voltage IOUT Package
CXPC3343/B 1x 1A Sync Buck 2x 1A LDO PWM/PFM Buck 7V; LDO 12V Buck 50μA, LDO 2mA 1.5MHz 97% 0.6V DC/DC: 1A  LDO: 1A DFN3x3-12L 
CXPC3344 1 x 18V/2A Buck 1 x 6V/1.5A LDO PWM/PFM Buck 18V; LDO 6V Buck 0.8mA, LDO 100μA 500KHz 96% 0.8V DC/DC: 2A  LDO: 1.5A ESOP8  DFN2x3-8
CXPC3345 1 x 18V/2A Buck 2 x 6V/1.5A LDO PWM/PFM Buck 18V; LDO 6V Buck 0.8mA, LDO 100μA 500KHz 96% 0.8V DC/DC: 2A  LDO: 1.5A DFN3x3-12
CXPC3346 1 x 6V/1.5A Buck 2 x 6V/0.5A LDO PWM/PFM Buck 6V; LDO 6V Buck 40μA, LDO 35μA 1.5MHz 96% 0.6V DC/DC: 1.5A LDO: 0.5A ESOP8
CXPC3347 1 x 7V/1A Buck  1 x 6V/0.5A LDO PWM/PFM Buck 7V; LDO 6V Buck 50μA, LDO 35μA 1.5MHz 97% 0.6V DC/DC: 1A  LDO: 0.5A DFN2x2-8
CXPC3348 2 x 6V/1.5A Buck  2 x 6V/0.5A LDO PWM/PFM Buck 6V; LDO 6V Buck 40μA, LDO 35μA 1.5MHz 96% 0.6V DC/DC: 1.5A LDO: 0.5A QFN3x3-16