同步buck-PWM转换器VDDQ 源极和陷极LDO线性调节器VTT CXSD62182 PWM模式的开关频率补偿双向输出电流的稳压

目录

1.产品概述       2.产品特点     iDW嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）iDW嘉泰姆

5.产品封装       6.电路原理图  iDW嘉泰姆

7.相关产品iDW嘉泰姆

   产品概述 返回TOPiDW嘉泰姆

The CXSD62182 integrates a synchronous buck PWM converter to generate VDDQ, a sourcing and sinking LDO linear regulator to generate VTT. It offers the lowest total solution cost in system where space is at a premium. The CXSD62182 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXSD62182 provides very high efficiency over light to heavy loads with loadingmodulated switching frequencies. On TQFN-32 Package, the Forced PWM Mode works nearly at constant frequency for low-noise requirements. The CXSD62182 is equipped with accurate current-limit, output under-voltage, and output over-voltage protections. A Power-On- Reset function monitors the voltage on VCC prevents wrong operation during power on. The LDO is designed to provide a regulated voltage with bi-directional output current for DDR-SDRAM termination. The device integrates two power transistors to source or sink current up to 1.5A. It also incorporates current-limit and thermal shutdown protection. The output voltage of LDO tracks the voltage at VREF pin. An internal resistor divider is used to provide a half voltage of VREF for VTTREF and VTT Voltage. The VTT output voltage is only requiring 20mF of ceramic output capacitance for stability and fast transient response. The S3 and S5 pins provide the sleep state for VTT (S3 state) and suspend state (S4/S5 state) for device, when S5 and S3 are both pulled low the device provides the soft-off for VTT and VTTREF.

   产品特点 返回TOPiDW嘉泰姆

   Buck Controller (VDDQ) iDW嘉泰姆

· High Input Voltages Range from 4.5V to 26V Input Power iDW嘉泰姆

· Provide Adjustable Output Voltage from 0.75V to 3.3V iDW嘉泰姆

· Integrated MOSFETDrivers and Bootstrap Forward P-CHMOSFET iDW嘉泰姆

· Low Quiescent Current (200uA) iDW嘉泰姆

· Excellent Load Transient Responses iDW嘉泰姆

· PFM Mode for Increased Light Load Efficiency iDW嘉泰姆

· Constant On-Time Controller Scheme iDW嘉泰姆

- Switching Frequency Compensation for PWM Mode iDW嘉泰姆

- Adjustable Switching Frequency from 400kHz to 550kHz in PWM Mode with DC Output Current iDW嘉泰姆

· S3 and S5 Pins Control The Device in S0, S3 or S4/ S5 State iDW嘉泰姆

· Power Good Monitoring iDW嘉泰姆

· 70% Under-Voltage Protection (UVP) iDW嘉泰姆

· 125% Over-Voltage Protection (OVP) iDW嘉泰姆

· Adjustable Current-Limit Protection iDW嘉泰姆

- Using Sense Low-Side MOSFET’s RDS(ON) iDW嘉泰姆

· TQFN-32 4mmx4mm Thin package iDW嘉泰姆

· Lead Free Available (RoHS Compliant) +1.5A LDO Section (VTT) iDW嘉泰姆

· Souring or Sinking Current up to 1.5A iDW嘉泰姆

· Fast Transient Response for Output Voltage iDW嘉泰姆

· Output Ceramic Capacitors Support at least 10mF MLCC iDW嘉泰姆

· VTT and VTTREF Track at Half the VDDQSNS by internal divider iDW嘉泰姆

· +20mV Accuracy for VTT and VTTREF iDW嘉泰姆

· Independent Over-Current Limit (OCL) iDW嘉泰姆

· Thermal Shutdown ProtectioniDW嘉泰姆

   应用范围 返回TOPiDW嘉泰姆

· DDR3 and DDR4 Memory Power Supplies iDW嘉泰姆

· SSTL-2 SSTL-18 and HSTL TerminationiDW嘉泰姆

   技术规格书（产品PDF) 返回TOP iDW嘉泰姆

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产品封装图 返回TOPiDW嘉泰姆

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电路原理图 返回TOPiDW嘉泰姆

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