目录xWc嘉泰姆 1.产品概述 2.产品特点
3.应用范围 4.下载产品资料PDF文档
5.产品封装图</span> 6.电路原理图</span>
7.功能概述 8.相关产品xWc嘉泰姆 一,产品概述(General Description)
The CXSD62106/A integrates a synchronous buck PWM controller to generate
VDDQ, a sourcing and sinking LDO linear regulator to generate VTT. It provides
a complete power supply for DDR2 and DDR3 memory system. It offers the lowest
total solution cost in system where space is at a premium.
The CXSD62106/A provides excellent transient response and accurate DC xWc嘉泰姆 voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXSD62106/A provides very high efficiency over light to heavy loads with loading-modulated switching frequencies. On TQFN4x4- 24A package, the Forced PWM xWc嘉泰姆 Mode works nearly at con-stant frequency for low-noise requirements.
The CXSD62106/A is equipped with accurate current-limit,output under-voltage,xWc嘉泰姆 and output over-voltage protections.A Power-On-Reset function monitors the xWc嘉泰姆 voltage on VCC prevents wrong operation during power on.The LDO is designed xWc嘉泰姆 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 xWc嘉泰姆 up to 1.5A. It also incorporates current-limit and thermal shutdown protection.xWc嘉泰姆 The output voltage of LDO tracks the voltage at VTTREF pin. An internal resistorxWc嘉泰姆 divider is used to provide a half voltage of VDDQ for VTTREF and VTT Voltage. xWc嘉泰姆 The VTT output voltage is only requiring 20μF of ceramic output capacitance forxWc嘉泰姆 stability and fast transient response. The S3 and S5 pins provide the sleep statexWc嘉泰姆 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.
The CXSD62106/A is available in 4mmx4mm 24-pin TQFN package, and the xWc嘉泰姆 CXSD62106A is available in 3mmx3mm 20-pin TQFN package.
二</span>.产品特点(Features)
Buck Controller (VDDQ)
· High Input Voltages Range from 3V to 28V Input Power
Provide 1.8V (DDR2), 1.5V (DDR3) or Adjustable
Output Voltage from 0.75V to 5.5V
- ±1% Accuracy Over-Temperature
Integrated MOSFET Drivers and Bootstrap Diode
Excellent Line and Load Transient Responses
PFM Mode for Increased Light Load Efficiency
Constant-On-Time Controller Scheme
- Switching Frequency Compensation for PWMMode
- Adjustable Switching Frequency from 100kHz
to 550kHz in PWM Mode with DC Output Current
Integrated MOSFET Drivers and Bootstrap Diode
S3 and S5 Pins Control The Device in S0, S3, or S4/S5 State
Power Good Monitoring
70% Under-Voltage Protection (UVP)
125% Over-Voltage Protection (OVP)
Adjustable Current-Limit Protection
Using Sense Low-Side MOSFET RDS(ON)
±1.5A LDO Section (VTT)
Souring or Sinking Current up to 1.5A
Fast Transient Response for Output Voltage
Output Ceramic Capacitors Support at Least 10μF MLCC
VTT and VTTREF Track at Half the VDDQSNS by Internal Divider
±20mV Accuracy for VTT and VTTREF
xWc嘉泰姆 Independent Over-Current-Limit (OCL) xWc嘉泰姆 Thermal Shutdown ProtectionxWc嘉泰姆 QFN-24 4mmx4mm Thin Package (TQFN4x4-24A)
for CXSD62106 and QFN-20 3mmx3mm Thin
Package (TQFN3x3-20) for CXSD62106A
Lead Free and Green Devices AvailablexWc嘉泰姆 | 
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