3CHBuckConverterwithExternalResetControlandBrownOutTimer

产品概述
The CXSD62554 is a Triple channel synchronous modePWM converter with one channel capable of 2.5A andother capable of 1.5A/1.5A continuous current capability.The device also has an independent Reset control func-tion eliminating an external part that is otherwise needed.CXSD62554 is specially designed to support DDR4,LPDDR4 and LPDDR4X power on and off sequence perJEDEC spec. The three converters operate 120 degreeout of phase in order to minimize switching noise. Eachchannel is capable of adjusting its output voltage via aninternal 0.6V reference using an external resistor divider.The internal switching frequency is set at 600kHz. Otherfeatures of the part include, UVP, Current Limit and OTP.The CXSD62554 is offered in a VTQFN3x3-20 package al-lowing small size while having an excellent thermal ca-pability for power dissipation.
产品特点
•Input Voltage range : 4.5V to 5.5V
•2.5A/1.5A/1.5A Output Current on Channel1/2/3.
•Low IQ=200uA (typ.) to improve Light LoadEfficiency
•Typical 0.6V+1% Internal Reference Voltage
•Brown Out Function
•Power Flag Signal for Proper LPDDR4X voltagesequencing
•External Reset Function•Power Good and Reset Signal
•Optimized Upper and Lower MOSFETs RDS_on formax Efficiency:
- N-CH MOSFET (120 mΩ) for CH1/2/3 High Side.
- N-CH MOSFET (30 mΩ) for CH1 Low Side.
- N-CH MOSFET (50 mΩ) for CH2/3 Low Side.
•Built in OVP, UVP, Current Limit and OTP.
•Low Cost VTQFN3x3-20 package.
•Lead Free and Green Devices Available (RoHSCompliant).
应用范围
•Set-Top-Box
•DDR4, LPDDR4, LPDDR4X
•Digital Subscriber Line
•Passive Optical Network
•G.fast