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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.7Td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.7Td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.7Td嘉泰姆
Typical LDO output voltage: VO1=2.8V, VO2=1.8V.7Td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.7Td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TOP7Td嘉泰姆

High Efficiency : Up to 96%7Td嘉泰姆
Capable of Delivering 1.5A7Td嘉泰姆
1.5MHz Switching Frequency7Td嘉泰姆
No External Schottky Diode Needed7Td嘉泰姆
Low dropout 100% Duty operation7Td嘉泰姆
PFM Mode for High Efficiency in Light Load7Td嘉泰姆
Over temperature Protected7Td嘉泰姆
Low Quiescent Current: 40μA7Td嘉泰姆
Short Circuit Protection7Td嘉泰姆
Inrush Current Limit and Soft Start7Td嘉泰姆
LDO7Td嘉泰姆
Max output current for each channel is 0.5A7Td嘉泰姆
Input voltage range: 2 – 6V7Td嘉泰姆
Output voltage range: 1.2V~4.5V (customized on command every 0.1V step)7Td嘉泰姆
Low power consumption: 40uA (Typ.)7Td嘉泰姆
Low output noise (47uVRMS)7Td嘉泰姆
Low dropout voltage:7Td嘉泰姆
600mV@IO1=500mA, VO1=2.8V7Td嘉泰姆
800mV@IO2=500mA, VO2=1.8V7Td嘉泰姆
High ripple rejection:65dB@1KHz (Typ.)7Td嘉泰姆
Low temperature coefficient: ±100ppm/C7Td嘉泰姆
Excellent line regulation: 0.05%/V7Td嘉泰姆
Highly accurate: ±2%7Td嘉泰姆
Output current limit7Td嘉泰姆
Fold-back short circuit current7Td嘉泰姆

   应用范围 返回TOP7Td嘉泰姆

   Distributed Power Systems7Td嘉泰姆
 Digital Set Top Boxes7Td嘉泰姆
 Flat Panel Television and Monitors7Td嘉泰姆
 Wireless and DSL Modems7Td嘉泰姆
 Power source for cellular phones and various kind of PCSs7Td嘉泰姆
 Battery Powered equipment7Td嘉泰姆

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