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LM22677 Scheda tecnica(PDF) 5 Page - Texas Instruments |
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LM22677 Scheda tecnica(HTML) 5 Page - Texas Instruments |
5 / 28 page LM22677, LM22677-Q1 www.ti.com SNVS582O – SEPTEMBER 2008 – REVISED AUGUST 2015 6.6 Electrical Characteristics Typical values represent the most likely parametric norm at TA = TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified: VIN = 12 V. PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT LM22677-5.0 VIN = 8 V to 42 V 4.925 5.0 5.075 VFB Feedback Voltage V VIN = 8 V to 42 V, –40°C ≤ TJ ≤ 125°C 4.9 5.1 LM22677-ADJ VIN = 4.7 V to 42 V 1.266 1.285 1.304 VFB Feedback Voltage V VIN = 4.7 V to 42 V, –40°C ≤ TJ ≤ 125°C 1.259 1.311 ALL OUTPUT VOLTAGE VERSIONS VFB = 5 V 3.4 IQ Quiescent Current mA VFB = 5 V, –40°C ≤ TJ ≤ 125°C 6 ISTDBY Standby Quiescent Current EN Pin = 0 V 25 40 µA 6.0 7.1 8.4 ICL Current Limit A –40°C ≤ TJ ≤ 125°C 5.75 8.75 VIN = 42 V, EN Pin = 0 V, VSW = 0 V 0.2 2 µA IL Output Leakage Current VSW = –1 V 0.1 3 µA 0.1 0.14 RDS(ON) Switch On-Resistance Ω –40°C ≤ TJ ≤ 125°C 0.2 500 fO Oscillator Frequency kHz –40°C ≤ TJ ≤ 125°C 400 600 200 TOFFMIN Minimum Off-time ns –40°C ≤ TJ ≤ 125°C 100 300 TONMIN Minimum On-time 100 ns IBIAS Feedback Bias Current VFB = 1.3 V (ADJ Version Only) 230 nA Falling 1.6 VEN Enable Threshold Voltage V Falling, –40°C ≤ TJ ≤ 125°C 1.3 1.9 VENHYST Enable Voltage Hysteresis 0.6 V IEN Enable Input Current EN Input = 0 V 6 µA FSYNC Maximum Synchronization Frequency VSYNC = 3.5 V, 50% duty-cycle 1 MHz VSYNC Synchronization Threshold Voltage 1.75 V TSD Thermal Shutdown Threshold 150 °C (1) MIN and MAX limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate TI's Average Outgoing Quality Level (AOQL). (2) Typical values represent most likely parametric norms at the conditions specified and are not ensured. Copyright © 2008–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM22677 LM22677-Q1 |
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