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32V宽输入,高效率同步降压型开关稳压控制器-ZC3770替代LTC3770

已有 136 次阅读2024-6-11 14:03

FEATURES
*Wide Vin Range: 4V to 32V
*+0.67% 0.6V Reference Voltage
*Output Voltage Tracking Capability
*Programmable Margining
*Sense Resistor Optional
**True Current Mode Control
*2% to 90% Duty Cycle at 200kHz
*tON(MIN)S 100nS
*Phase-Locked Loop Frequency Synchronization
*Powerful Dual N-Channel MOSFET Driver
*Adjustable Cycle-by-Cycle Current Limit
*Adjustable Switching Frequency
*Programmable Soft-Start
*Current Foldback Protection (Disabled at Start-Up)
*Output Overvoltage Protection
*Micropower Shutdown: lo < 30μA
*Power Good Output Voltage Monitor
Tracks the Reference Input Pin
*Available in (5mm x 5mm) QFN and 28-Lead SSOP Packages
DESCRIPTION
The ZC3770 is a synchronous step-down switchingregulatorcontrollerwithoutputvoltageup/downtracking capability and voltage margining. ltsadvanced functions and high accuracy referenceare ideal for powering high performance server,ASlC and computer memory systems.
The ZC3770 uses a constant on-time,
valleycurrentmodecontrolarchitecturetodeliververylowdutyfactors withoutrequiringasenseresistor.Theoperatingfrequencyisselectedbyanexternalresistorandiscompensatedforvariationsininputsupplyvoltage.Aninternalphase-locked loop allows the lC to besynchronized to an external clock.
Faultprotectionisprovidedbyanovervoltagecomparator and input undervoltage lockout. The regulatorcurrent limit is user programmable. A wide supplyrange allows voltages as high as 32V to be steppeddown to as low as a0.6Voutput.Powersupplysequencingisaccomplished using anexternal soft-start timing capacitor.
APPLICATIONS
*Distributed Power Systems
*Server Power Supply
合作洽谈/样品申请:402572194(QQ)
邮箱:gaomaobing@zcc-china.net

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