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LX1675CLQ Datasheet(PDF) 4 Page - Microsemi Corporation |
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LX1675CLQ Datasheet(HTML) 4 Page - Microsemi Corporation |
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4 / 19 page  LX1675 PRODUCTION DATA SHEET Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 Copyright © 2004 Rev. 1.2a, 2006-02-16 Multiple Output LoadSHARE™ PWM TM ® ELECTRICAL CHA RACTERISTICS For the LX1675ILQ the following specifications apply over the ambient temperature -40°C < TA < 85°C and for the LX1675CLQ 0 °C ≤ TA ≤ 85°C except where otherwise noted and the following test conditions: VIN & VSLR = 12V, VCX = 17V, HOX and LOX =3000pF Load, FS = 0 (f = 300KHz). LX1675 Parameter Symbol Test Conditions Min Typ Max Units SWITCHING REGULATORS VIN Regulator Functional 4.5 24 VCX 30 Input Voltage VCCL 6 V Operation Current IVIN Static 6 mA Feedback Voltage Internal Reference VFB 4.5V < VIN < 12V 0.784 0.816 V Line Regulation -1 1 % Load Regulation System Level measurement, Closed Loop -1 1 % High Side Minimum Pulse Width Load = 3000pF 50 nS 600kHz 74 % Maximum Duty Cycle PWMDC 85 % Lox Minimum On Time VLOx @ 25°C from 3V going high to 1V going low 180 225 320 nS Buffered Reference Voltage VREF Max Load Current 0.5mA 0.778 0.822 V ERROR AMPLIFIER Input Offset Voltage VOS Common Mode Input Voltage = 1V -7.0 7.0 mV DC Open Loop Gain 70 dB Unity gain bandwidth AVUGBW 10 MHz High Output Voltage VOH I Source = 2mA 3.75 5.0 V Low Output Voltage VOL I Sink = 100µA 100 mV Input Common Mode Range Input Offset Voltage < 20mV 0.1 3.5 V Input Bias Current IIN 0V and 3.5V Common Mode Voltage 100 nA CURRENT SENSE CS Bias Current (Source) ISET VCSX = -0.2V, VPGX = 0V @ 25°C 48 55 62 µA CS Trip Threshold VTRIP Referenced to VCSX, VPGX = 0V ±3 mV CS Delay (Blanking) TCSD 150 nS VIH Any PWM Output Activating Current Limit for More than 4 Clock Cycles, Soft Starts all PWM Outputs 2 Shared Fault Mode VIL Current Limit Event of One PWM Does Not Effect the Continued Function of the Two Other PWM Regulators 0.8 V OUTPUT DRIVERS – N Channel MOSFETS Low Side Driver Operating Current IVCCL Static 2.5 mA High Side Driver Operating Current IVCX Static 3 mA Drive Rise and Fall Time TR/F CL = 3000pF 50 nS Dead Time – High Side to Low Side or Low Side to High Side TDEAD Drive Load = 3000pF, VDRIVE < 1V 50 nS High Side Driver Voltage Drive High IHOx = 20mA, VCx – HRx = 5.0V 4.8 4.9 Drive Low VHOx IHOx = -20mA, VCx – HRx = 5.0V 0.1 0.2 V Low Side Driver Voltage Drive High ILOx = 20mA, VCCL – PGx = 5.0V 4.8 4.9 Drive Low VLOx ILOx = -20mA, VCCL – PGx = 5.0V 0.1 0.2 V High Side Driver Current IHOx VCx – HRx = 5.0V, Capacitive Load, PW < 200ns ±1 APEAK Low Side Driver Current ILOx VCCL – PGx = 5.0V, Capacitive Load, PW < 200ns ±1.5 APEAK Maximum Load QgMAX 50 nC OSCILLATOR VFS <0.8V @ 25°C 255 300 345 KHz PWM Switching Frequency FSW VFS >2V @ 25°C 510 600 690 KHz Ramp Amplitude VRAMP 1.6 VPP |
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