产品概述

返回TOP

The CXPC3347is a power management unit (PMU), with 1 synchronous Buck and 1 CMOS low-dropout regulators that delivers a maximum current of 1A for Buck’s output and a maximum current of 0.5A for LDO’s output.d8I嘉泰姆
The synchronous buck is a high-efficiency, DC-to-DC step-down switching regulator, capable of delivering up to 1A of output current. The device operates from an input voltage range of 2.6V to 6V and provides an output voltage from 0.6V to VDD, making the buck ideal for low voltage power conversions. Running at a fixed frequency of 1.5MHz allows the use of small external components, such as ceramic input and output caps, as well as small inductors, while still providing low output ripples. This low noise output along with its excellent efficiency achieved by the internal synchronous rectifier, making the buck an ideal green replacement for large power consuming linear regulator. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protection improves design reliability.d8I嘉泰姆
The LDO is a low-dropout regulator that delivers a maximum current of 0.5A output. Typical dropout voltage at 0.5A load current is 0.8V. It has excellent load and line transient response and good temperature characteristics, which can assure the stability of chip and power system. The output accuracy is set within 2% by trimming.d8I嘉泰姆
Typical LDO output voltage: VOUT=1.8V. 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. LDO 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.d8I嘉泰姆
CXPC3347is available in lead (Pb)-free DFN2X2-8 (with exposed pad for heat dissipation) package.

   产品特点 返回TOPd8I嘉泰姆

   High Efficiency : Up to 97%d8I嘉泰姆

• Capable of Delivering 1A
• 1.5MHz Switching Frequency
• No External Schottky Diode Needed
• Low dropout 100% Duty operation
• Internal Compensation and Soft-Start
• Current Mode control
• 0.6V Reference for Low Output voltages
• Logic Control Shutdown (IQ<1uA)
• Thermal shutdown, UVLO and OVP
• LDO
• Max output current is 0.5A
• Input voltage range: 2 – 6V
• Output voltage range: 1.2V~4.5V (customized on command every 0.1V step)
• Low power consumption: 40uA (Typ.)
• Low output noise (47uVRMS)
• Shutdown mode: 0.1uA
• Low dropout voltage:
• 800mV@IOUT=500mA, VOUT=1.8V
• High PSRR: 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TOPd8I嘉泰姆

    Distributed Power Systemsd8I嘉泰姆
 Digital Set Top Boxesd8I嘉泰姆
 Flat Panel Television and Monitorsd8I嘉泰姆
 Wireless and DSL Modemsd8I嘉泰姆
 Power source for cellular phones and various kind of PCSsd8I嘉泰姆
 Battery Powered equipmentd8I嘉泰姆

   技术规格书（产品PDF) 返回TOP d8I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！d8I嘉泰姆

      d8I嘉泰姆

   产品封装图 返回TOPd8I嘉泰姆

  d8I嘉泰姆

   电路原理图 返回TOPd8I嘉泰姆

d8I嘉泰姆

  相关芯片选择指南 返回TOPd8I嘉泰姆