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LM2631MTC-ADJ Fiches technique(PDF) 3 Page - National Semiconductor (TI) |
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LM2631MTC-ADJ Fiches technique(HTML) 3 Page - National Semiconductor (TI) |
3 / 12 page Electrical Characteristics (Continued) Specifications in standard type face are for T j = 25˚C and those with boldface type apply over full operating junction tem- perature range. V IN =10V, GND = PGND = 0V,unless otherwise stated. (Notes 5, 6) Symbol Parameter Conditions Typical Limit Units System V OUT Low Regulation Comparator Enable Threshold 97 % V OUT Hysteresis of Low Regulation Comparator 2 % V OUT Regulator Window Detector Thresholds (PGOOD from High to Low) 91 or 109 % V OUT Regulator Window Detector Thresholds (PGOOD from Low to High) 97 or 103 % V OUT Gate Drive V BOOT Bootstrap Voltage (Voltage from CBOOT to SW) CBOOT Sourcing 100 µA 4.5 V 4.0 V(min) I BOOT CBOOT Leakage Current V CBOOT = 7V 100 nA High Drive Source Current V HDRV = 0V, VCBOOT = 5V 0.3 A High Drive Sink Current HDRV Forced to 5V 0.45 A Low Drive Source Current LDRV Forced to 0V 0.35 A Low Drive Sink Current LDRV Forced to 5V 0.55 A High-Side FET On-Resistance HDRV or LDRV 8 Ω Low-Side FET On-Resistance HDRV or LDRV 4 Ω Oscillator F OSC Oscillator Frequency FADJ Open 200 kHz 172/162 kHz(min) 228/230 kHz(max) Oscillator Frequency FADJ Sourcing 2.94 µA (Note 9) 300 kHz 255 kHz(min) 345 kHz(max) V FADJ Voltage at FADJ pin 1.03 V D MAX Maximum Duty Cycle FADJ Open 96 % 92 %(min) Maximum Frequency of Synchronization Low-Going 200 ns Wide Rectangular Pulses Applied at 400 kHz at the SYNC Input 400 kHz(min) Minimum Pulse Width of the SYNC Signal SYNC Pulses are Low-Going 200 ns(min) Error Amplifier I FB Feedback Input Bias Current V FB = 1.3V, VCSH = 5.15V, VCSL = 5V 100 nA I COMP COMP Output Source Current V COMP = 0.2V, VFB = 1V 50 µA COMP Output Sink Current V COMP = 1.2V, VFB = 1.4V 50 µA Voltage Reference V REF Reference Voltage (Nominal)) I REF = 0µA 1.238 V 1.219/1.219 V(min) 1.251/1.262 V(max) www.national.com 3 |
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