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LMR14050 データシート(PDF) 5 Page - Texas Instruments |
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LMR14050 データシート(HTML) 5 Page - Texas Instruments |
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5 / 31 page  5 LMR14050 www.ti.com SNVSAA6A – FEBRUARY 2015 – REVISED MARCH 2015 Product Folder Links: LMR14050 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated 7.5 Electrical Characteristics Limits apply over the recommended operating junction temperature (TJ) range of -40°C to +125°C, unless otherwise stated. Minimum and Maximum limits are specified 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 specified, the following conditions apply: VIN = 4.0 V to 40 V PARAMETER TEST CONDITION MIN TYP MAX UNIT POWER SUPPLY (VIN PIN) VIN Operation input voltage 4 40 V UVLO Under voltage lockout thresholds Rising threshold 3.5 3.7 3.9 V Hysteresis 285 mV ISHDN Shutdown supply current VEN = 0 V, TA = 25°C, 4.0 V ≤ VIN ≤ 40 V 1.0 3.0 μA IQ Operating quiescent current (non- switching) VFB = 1.0 V, TA = 25°C 40 μA ENABLE (EN PIN) VEN_TH EN Threshold Voltage 1.05 1.20 1.38 V IEN_PIN EN PIN current Enable threshold +50 mV -4.6 μA Enable threshold -50 mV -1.0 IEN_HYS EN hysteresis current -3.6 μA EXTERNAL SOFT-START ISS SS pin current TA = 25°C 3 μA VOLTAGE REFERENCE (FB PIN) VFB Feedback voltage TJ = 25°C 0.744 0.750 0.756 V TJ = -40°C to 125°C 0.735 0.750 0.765 V HIGH-SIDE MOSFET RDS_ON On-resistance VIN = 12 V, BOOT to SW = 5.8 V 90 180 m Ω High-side MOSFET CURRENT LIMIT ILIMT Current limit VIN = 12 V, TA = 25°C, Open Loop 6.2 7.9 9.7 A THERMAL PERFORMANCE TSHDN Thermal shutdown threshold 170 °C THYS Hysteresis 12 7.6 Switching Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITION MIN TYP MAX UNIT fSW Switching frequency RT = 49.9 kΩ, 1% accuracy 400 500 600 kHz VSYNC_HI SYNC clock high level threshold 1.7 V VSYNC_LO SYNC clock low level threshold 0.5 TSYNC_MIN Minimum SYNC input pulse width Measured at 500 kHz, VSYNC_HI > 3 V, VSYNC_LO < 0.3 V 30 ns TLOCK_IN PLL lock in time Measured at 500 kHz 100 µs TON_MIN Minimum controllable on time VIN = 12 V, BOOT to SW = 5.8 V, ILoad = 1 A 75 ns DMAX Maximum duty cycle fSW = 200 kHz 97 % |
同様の部品番号 - LMR14050 |
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同様の説明 - LMR14050 |
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