MAX786, MAX786R, MAX786S

双输出电源控制器,用于笔记本电脑

3.3V、5V双输出笔记本电脑电源,以高于> 90%的效率提供高达50W的功率


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说明

The MAX786 is a system-engineered power-supply controller for notebook computers or similar battery-powered equipment. It provides two high-performance step-down (buck) pulse-width modulators (PWMs) for +3.3V and +5V. Other features include dual, low-dropout, micropower linear regulators for CMOS/RTC back-up, and two precision low-battery-detection comparators.

High efficiency (95% at 2A; greater than 80% at loads from 5mA to 3A) is achieved through synchronous rectification and PWM operation at heavy loads, and Idle Mode™ operation at light loads. The MAX786 uses physically small components, thanks to high operating frequencies (300kHz/200kHz) and a new current-mode PWM architecture that allows for output filter capacitors as small as 30µF per ampere of load. Line- and load-transient responses are terrific, with a high 60kHz unity-gain crossover frequency allowing output transients to be corrected within four or five clock cycles. Low system cost is achieved through a high level of integration and the use of low-cost, external N-channel MOSFETs.

Other features include low-noise, fixed-frequency PWM operation at moderate to heavy loads, and a synchronizable oscillator for noise-sensitive applications such as electromagnetic pen-based systems and communicating computers. The MAX786 is a monolithic, BiCMOS IC available in fine-pitch, surface-mount SSOP packages.
MAX786、MAX786R、MAX786S:典型应用电路 MAX786、MAX786R、MAX786S:典型应用电路 放大+

关键特性

  • Dual PWM Buck Controllers (+3.3V and +5V)
  • Two Precision Comparators or Level Translators
  • 95% Efficiency
  • 420µA Quiescent Current, 70µA in Standby (linear regulators alive)
  • 25µA Shutdown Current (+5V linear alive)
  • 5.5V to 30V Input Range
  • Small SSOP Package
  • Fixed Output Voltages:
    • 3.3V (standard)
    • 3.45V (High-Speed Pentium®)
    • 3.6V (PowerPC®)

应用

  • 通信系统
  • 笔记本电脑
  • 笔输入系统
  • 便携式数据终端

请查看具体的参数规格 Step-Down Switching Regulators (404)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
Switch TypeSynchronous SwitchingOper. Freq.
(kHz)
FeaturesPackage/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX786 5.5303.355ExternalYes300
Adjustable Freq.
Current Limit
External Sync.
Fixed Freq./PWM
SSOP/28
$5.84 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。
申请可靠性报告: MAX786  MAX786R  MAX786S 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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