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FP6321

Fitipower
Part Number FP6321
Manufacturer Fitipower
Description Sunchronous Buck PWM DC-DC Controller
Published Nov 28, 2011
Detailed Description www.DataSheet.co.kr fitipower integrated technology lnc. FP6321 Synchronous Buck PWM DC-DC Controller Description The...
Datasheet PDF File FP6321 PDF File

FP6321
FP6321

Overview
www.
DataSheet.
co.
kr fitipower integrated technology lnc.
FP6321 Synchronous Buck PWM DC-DC Controller Description The FP6321 is designed to drive two N-channel MOSFETs in a synchronous rectified buck topology.
It provides the output adjustment, internal soft-start, frequency compensation networks, monitoring and protection functions into a single package.
The IC operating at fixed 300kHz frequency provides simple, single feedback loop, voltage mode control with fast transient response.
The resulting PWM duty ratio ranges from 0-100%.
The FP6321 features over current protection.
The output current is monitored by sensing the voltage drop across the RDS-ON of the low side MOSFET which eliminates the need for a current sensing resistor.
This device is available in SOP-8 package.
Features ● Operates from +5V or +12V ● Drives Two Low Cost N-Channel MOSFETs ● Fast Transient Response ● Simple Single-Loop Control Design ( Voltage-Mode PWM Control) ● Internal Soft-Start ● Over-Current Fault Monitor ● SOP-8 Package ● RoHS Compliant Applications ● Motherboard ● Graphic Card ● Telecomm Equipments ● High Power DC-DC Regulators ● Servers Pin Assignment SO Package (SOP-8) Ordering Information FP6321□□□ TR: Tape / Reel P:Green G:Green Package Type SO: SOP-8 Figure 1.
Pin Assignment of FP6321 FP6321-1.
3 -FEB-2010 1 Datasheet pdf - http://www.
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FP6321 Typical Application Circuit Figure 2.
Typical Application Circuit of FP6321 Note: It is not recommended to apply FP6321 on VCC=12V/ VIN =12V condition Functional Pin Description Pin Name BOOT UGATE GND LGATE VCC FB OCSET PHASE Pin Function This pin provides bias voltage to the high side MOSFET Driver.
A bootstrap circuit may be to create a BOOT voltage suitable to drive a standard N-Channel MOSFET.
Connect UGATE to the high side MOSFET gate.
This pin is monitored by the adaptive shoot-through protection circuitry to determine when the high side MOSF...


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