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LM20502SILT Datasheet(PDF) 6 Page - Texas Instruments |
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LM20502SILT Datasheet(HTML) 6 Page - Texas Instruments |
6 / 37 page LMZ20502 SNVS852C – JUNE 2012 – REVISED APRIL 2015 www.ti.com 7.5 Electrical Characteristics Limits apply over the recommended operating junction temperature range of –40°C to 125°C, unless otherwise noted. Minimum and maximum limits are verified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 3.6 V PARAMETER TEST CONDITIONS MIN (1) TYP MAX(1) UNIT VFB Feedback voltage VIN = 3.6 V 0.594 0.6 0.606 V IQ_AUTO Operating quiescent current in AUTO mode, VFB = 0.8V 72 90 µA AUTO mode IQ_PWM Operating quiescent current in PWM mode, VFB = 0.8V 490 620 µA forced PWM mode IQ_off Shutdown quiescent current(2) VIN = 3.6 V, VEN = 0.0 V 0.7 1.5 µA VIN = 5.5 V, VEN = 0.0 V 1.0 2.4 VUVLO Input supply under-voltage Rising 2.5 V lock-out thresholds Falling 2.3 VEN High Level Input Voltage VIH 1.4 V Low Level Input Voltage VIL 0.4 VMODE High Level Input Voltage VIH 1.2 V Low Level Input Voltage VIL 0.4 I LIM Peak switch current limit(3) 2.1 2.7 A Fosc Internal oscillator frequency 2.5 3.0 3.2 MHz TON Minimum switch on-time(4) 50 ns Tss Soft start time (4) 800 µs RPG Power good flag pull-down 40 70 110 Ω Rdson VPG1 Power good flag, under- % of feedback voltage, rising 92% voltage trip(5) VPG2 Power good flag, under- % of feedback voltage, falling 88% voltage trip(5) VPG3 Power good flag, over-voltage % of feedback voltage, rising 112% trip(5) VPG4 Power good flag, over-voltage % of feedback voltage, falling 108% trip(5) TSD Thermal shutdown(4) Rising threshold 159 °C Thermal shutdown 15 °C hysteresis(4) (1) MIN and MAX limits are 100% production tested at 25°C. Limits over the operating temperature range are verified through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Shutdown current includes leakage current of the switching transistors. (3) This is the peak switch current limit measured with a slow current ramp. Due to inherent delays in the current limit comparator, the peak current limit measured at 3MHz will be larger. (4) This parameter is not tested in production. (5) See Power Good Flag Function for explanation of voltage levels. 6 Submit Documentation Feedback Copyright © 2012–2015, Texas Instruments Incorporated Product Folder Links: LMZ20502 |
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