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LM27402 数据表(PDF) 7 Page - Texas Instruments |
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LM27402 数据表(HTML) 7 Page - Texas Instruments |
7 / 48 page LM27402 www.ti.com SNVS615J – JANUARY 2010 – REVISED JULY 2015 Electrical Characteristics (continued) Unless otherwise stated, the following conditions apply: VVIN = 12 V. Limits in standard type are for TJ = 25°C only. 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. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT POWERGOOD VPGOOD = 0.2 V, VFB = 0.75 V, TJ = 25°C 60 IPGS PGOOD Low Sink Current µA VPGOOD = 0.2 V, VFB = 0.75 V, TJ = 0 100 –40°C to +125°C IPGL PGOOD Leakage Current VPGOOD = 5 V 1 10 µA VFB Rising, TJ = 25°C 117% OVT Overvoltage Threshold VFB Rising, TJ = –40°C to +125°C 114% 120% OVT_HYS OVT Hysteresis VFB Falling 2% VFB Rising , TJ = 25°C 94% UVT Undervoltage Threshold VFB Rising, TJ = –40°C to +125°C 91% 97% UVT_HYS UVT Hysteresis VFB Falling 3% ENABLE VEN Rising, TJ = 25°C 1.17 VEN Enable Logic High Threshold V VEN Rising, TJ = –40°C to +125°C 1.10 1.24 VEN_HYS Enable Hysteresis VEN Falling 100 mV IEN Enable Pin pullup Current VEN = 0 V 2 µA FREQUENCY SYNCHRONIZATION VLH_SYNC SYNC Pin Logic High VVDD = 4.7 V, TJ = –40°C to +125°C 2.0 V VLL_SYNC SYNC Pin Logic Low VVDD = 4.7 V, TJ = –40°C to +125°C 0.8 V SYNCFSW_L Minimum Clock Sync Frequency TJ = –40°C to +125°C 200 kHz SYNCFSW_H Maximum Clock Sync Frequency TJ = –40°C to +125°C 1200 kHz THERMAL SHUTDOWN TSHD Thermal Shutdown Temperature Rising 165 °C TSHD_HYS Thermal Shutdown Hysteresis Temperature Falling 15 °C 6.6 Timing Requirements MIN NOM MAX UNIT SOFT-START TSS_INT Internal Soft-Start Time 1.28 ms POWERGOOD TDEGLITCH Deglitch Time VPGOOD Rising and Falling 20 µs 6.7 Switching Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SWITCHING VFB = 0.5 V, TJ = 25°C 165 TOFF_MIN Minimum Off Time ns VFB = 0.5 V, TJ = –40°C to +125°C 125 5 205 GATE DRIVE TDT Deadtime Timeout FSW = 500 kHz 40 ns Copyright © 2010–2015, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM27402 |
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类似说明 - LM27402 |
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