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     The CXPC3348 is a power management unit (PMU), with 2 synchronous Bucks 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.4p5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 CXPC3348 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.4p5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.4p5嘉泰姆
Typical LDO output voltage: VO1=1.2V, VO2=1.8V.4p5嘉泰姆
Other fixed voltage can be provided in the range of 1.0V~4.5V every 0.1V step. It also can be customized on command. LDOs can also work under a wide input voltage ranging from 1.8V to 6V. They can provide foldback short-circuit protection and output current limit function.4p5嘉泰姆
CXPC3348 is available in lead (Pb)-free QFN3x3-16

   产品特点 返回TOP4p5嘉泰姆

 High Efficiency : Up to 96%4p5嘉泰姆

• Capable of Delivering 1.5A
• 1.5MHz Switching Frequency
• No External Schottky Diode Needed
• Low dropout 100% Duty operation
• PFM Mode for High Efficiency in Light Load
• Over temperature Protected
• Low Quiescent Current: 40μA
• Short Circuit Protection
• Inrush Current Limit and Soft Start
• LDO
• Max output current for each channel is 0.5A
• Input voltage range: 1.8 – 6V
• Output voltage range: 1.0V~4.5V (customized on command every 0.1V step)
• Low power consumption: 50uA (Typ.)
• Low output noise (47uVRMS)
• Standby Mode: 0.1uA
• Low dropout voltage:
• 600mV@IO1=250mA, VO1=1.2V
• 800mV@IO2=500mA, VO2=1.8V
• High ripple rejection:65dB@1KHz (Typ.)
• Low temperature coefficient: ±100ppm/C
• Excellent line regulation: 0.05%/V
• Highly accurate: ±2%
• Output current limit
• Fold-back short circuit current

   应用范围 返回TOP4p5嘉泰姆

    Distributed Power Systems4p5嘉泰姆
 Digital Set Top Boxes4p5嘉泰姆
 Flat Panel Television and Monitors4p5嘉泰姆
 Wireless and DSL Modems4p5嘉泰姆
 Power source for cellular phones and various kind of PCSs4p5嘉泰姆
 Battery Powered equipment4p5嘉泰姆

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