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LM27262LQ Datasheet(PDF) 7 Page - National Semiconductor (TI) |
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LM27262LQ Datasheet(HTML) 7 Page - National Semiconductor (TI) |
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7 / 22 page  Electrical Characteristics (Note 5),(Note 6) V CC5V = 5V unless otherwise specified. (Continued) Symbol Parameter Conditions Min Typ Max Unit DAC Voltage Accuracy with Internal VREF VID codes from 1.5625V to 1.6000V ±0.9 % VID codes from 0.8375V to 1.1000V ±0.9 % VID codes from 1.1125V to 1.5500V ±0.75 % DAC Voltage Accuracy with External VREF = 1.225V VID codes: 1.5500V & 1.6000V -0.6 -0.8 ±0.15 0.75 0.8 % VID codes: 0.8375V & 1.0000V -1.0 -1.2 -0.15 1.0 1.2 % VID codes: 1.1000V, 1.2000, 1.3000, 1.4000 & 1.5000 -0.5 -0.8 ±0.1 0.5 0.8 % REFERENCE VOLTAGE Internal Reference Voltage 1.210 1.235 1.260 V VREF Output Load Regulation I VREF from 0 to 50 µA -2.5 mV VREF Line Regulation V CC5V = (4.65V to 5.5V), IVREF = 50uA ±0.2 mV External VREF Voltage REFINT=LOW, see LM27201 Electrical Specs. 1.225 V External VREF Compensating Offset (applied internally) REFINT=LOW 10 mV STANDARD OFFSET PROGRAMMING INPUTS: VPROG, VSTDOS, IREF IREF Output Voltage 100 µA Load Current 1.400 V VOS (VSTDOS-VPROG) IREF = 80.4 µA, R OS = 309 -25 mV LOAD LINE SLOPE ADJUSTMENT (SLADJ), CURRENT LIMIT (CLIMADJ) SLADJ2 Input Source Current SLADJ2 connected to GND 0.07 µA CLIMADJ Input Source Current V CLIMADJ = VREF 2 µA Load Line Slope (LLS) SLADJ divider 41.2k/8.45k, R SENSE =2m Ω -1.3 m Ω LLS Maximum Error Nominal LLS = -1.3mV/A, I SLADJ1 =50µA, Isense diff. input = 20mV; not switching ±0.06 m Ω CURRENT SENSE LINES VILx AND VIHx Current Sense Amplifier Input Offset Voltage Common Mode Voltage = 1.30V ±0.5 mV Current Sense Differential Voltage Range Over full VID range 0-100 mV Current Sense Input Source Current VIHx = VILx = 100mV 14 25 µA Differential Input Resistance Common Mode Voltage = 1.3V 1 k Ω CORE VOLTAGE ERROR AMPLIFIER VCORE Input Bias Current VFB = 1.4V 0.3 µA COMP Output Sink Current Vcomp = 2.5V VFB = 5V 100 µA COMP Output Source Current Vcomp = 4V VFB = 0V 0.5 mA VFB Input Bias Source Current VFB = 1.4V VDAC = 1.3V 1.0 µA www.national.com 7 |
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