• [ CXMD3258 ]

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1.产品概述       2.产品特点     G4B嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）G4B嘉泰姆

5.产品封装       6.电路原理图  G4B嘉泰姆

7.相关产品G4B嘉泰姆

   产品概述 返回TOPG4B嘉泰姆

The CXMD3258 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. The CXMD3258 steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers. The CXMD3258 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXMD3258 provides very high efficiency over light to heavy loads with loading- modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency forlow-noise requirements. The CXMD3258 is equipped with accurate positive current- limit, output under-voltage, and output over-voltage protections, perfect for NB applications. The Power-OnReset function monitors the voltage on VCC to prevent wrong operation during power-on. The CXMD3258 has a 1ms digital soft-start and built-in an integrated output discharge method for soft-stop. An internal integrated soft-start ramps up the output voltage with programmable slew rate to reduce the start-up current. A soft-stop function actively discharges the output capacitors with controlled reverse inductor current. The CXMD3258 is available in 10pin TDFN 3x3 package.

   产品特点 返回TOPG4B嘉泰姆

Adjustable Output Voltage from +0.7V to +5.5VG4B嘉泰姆

0.7V Reference VoltageG4B嘉泰姆

±1% Accuracy Over-TemperatureG4B嘉泰姆

Operates from an Input Battery Voltage Range of +1.8V to +32VG4B嘉泰姆

Power-On-Reset Monitoring on VCC PinG4B嘉泰姆

Excellent Line and Load Transient ResponsesG4B嘉泰姆

PFM Mode for Increased Light Load EfficiencyG4B嘉泰姆

Selectable PWM Frequency from 4 Preset ValuesG4B嘉泰姆

Integrated MOSFET DriversG4B嘉泰姆

Integrated Bootstrap Forward P-CH MOSFETG4B嘉泰姆

Adjustable Integrated Soft-Start and Soft-StopG4B嘉泰姆

Selectable Forced PWM or Automatic PFM/PWM ModeG4B嘉泰姆

Power Good MonitoringG4B嘉泰姆

70% Under-Voltage ProtectionG4B嘉泰姆

125% Over-Voltage ProtectionG4B嘉泰姆

Adjustable Current-Limit ProtectionG4B嘉泰姆

Using Sense Low-Side MOSFET’s RDS(ON)G4B嘉泰姆

Over-Temperature ProtectionG4B嘉泰姆

Auto Rework from Protection ModeG4B嘉泰姆

TDFN-10 3x3 PackageG4B嘉泰姆

Lead Free and Green Devices Available (RoHS Compliant)G4B嘉泰姆

   应用范围 返回TOPG4B嘉泰姆

NotebookG4B嘉泰姆

Table PCG4B嘉泰姆

Hand-Held PortableG4B嘉泰姆

AIO PCG4B嘉泰姆

LCD Monitor / TVG4B嘉泰姆

Battery ChargerG4B嘉泰姆

ADSL ModemG4B嘉泰姆

Telecom / Networking EquipmentG4B嘉泰姆

   技术规格书（产品PDF) 返回TOP G4B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！G4B嘉泰姆

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产品封装图 返回TOPG4B嘉泰姆

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电路原理图 返回TOPG4B嘉泰姆

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◀ 上一篇:CXMD3257单相恒定时间同步的脉宽调制控制器驱动N通道mosfet逐步降低高压在笔记本电脑中生成低压芯片组或RAM电源功率因数调制或脉宽调制模式下提供出色的瞬态响应和精确的直流电压输出

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下一篇▶:CXMD3259 PFM或PWM模式下提供瞬态响应和精确的直流电压输出自举正向P-CH MOSFET可调输出电压0.7V到5.5V电源复位监控 PFM模式提高轻载效率

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