产品概述

返回TOP

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.guO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.guO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.guO嘉泰姆
Typical LDO output voltage: VO1=2.8V, VO2=1.8V.guO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.guO嘉泰姆
CXPC3346 is available in lead (Pb)-free ESOP-8(with exposed pad for heat dissipation) package.

   产品特点 返回TOPguO嘉泰姆

High Efficiency : Up to 96%guO嘉泰姆
Capable of Delivering 1.5AguO嘉泰姆
1.5MHz Switching FrequencyguO嘉泰姆
No External Schottky Diode NeededguO嘉泰姆
Low dropout 100% Duty operationguO嘉泰姆
PFM Mode for High Efficiency in Light LoadguO嘉泰姆
Over temperature ProtectedguO嘉泰姆
Low Quiescent Current: 40μAguO嘉泰姆
Short Circuit ProtectionguO嘉泰姆
Inrush Current Limit and Soft StartguO嘉泰姆
LDOguO嘉泰姆
Max output current for each channel is 0.5AguO嘉泰姆
Input voltage range: 2 – 6VguO嘉泰姆
Output voltage range: 1.2V~4.5V (customized on command every 0.1V step)guO嘉泰姆
Low power consumption: 40uA (Typ.)guO嘉泰姆
Low output noise (47uVRMS)guO嘉泰姆
Low dropout voltage:guO嘉泰姆
600mV@IO1=500mA, VO1=2.8VguO嘉泰姆
800mV@IO2=500mA, VO2=1.8VguO嘉泰姆
High ripple rejection:65dB@1KHz (Typ.)guO嘉泰姆
Low temperature coefficient: ±100ppm/CguO嘉泰姆
Excellent line regulation: 0.05%/VguO嘉泰姆
Highly accurate: ±2%guO嘉泰姆
Output current limitguO嘉泰姆
Fold-back short circuit currentguO嘉泰姆

   应用范围 返回TOPguO嘉泰姆

   Distributed Power SystemsguO嘉泰姆
 Digital Set Top BoxesguO嘉泰姆
 Flat Panel Television and MonitorsguO嘉泰姆
 Wireless and DSL ModemsguO嘉泰姆
 Power source for cellular phones and various kind of PCSsguO嘉泰姆
 Battery Powered equipmentguO嘉泰姆

   技术规格书（产品PDF) 返回TOP guO嘉泰姆

     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！guO嘉泰姆

      guO嘉泰姆

   产品封装图 返回TOPguO嘉泰姆

  guO嘉泰姆

   电路原理图 返回TOPguO嘉泰姆

guO嘉泰姆

  相关芯片选择指南 返回TOPguO嘉泰姆