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LM20343 データシート(PDF) 4 Page - Texas Instruments |
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LM20343 データシート(HTML) 4 Page - Texas Instruments |
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4 / 30 page  LM20343 SNVS559A – MAY 2008 – REVISED AUGUST 2008 www.ti.com Absolute Maximum Ratings (1) (2) VIN to GND -0.3V to +38V BOOT to GND -0.3V to +43V BOOT to SW -0.3V to +7V SW to GND -0.5V to +38V SW to GND (Transient) -1.5V (< 20 ns) FB, EN, SS/TRK, RT, PGOOD to GND -0.3V to +6V VCC to GND -0.3V to +8V Storage Temperature -65°C to 150°C ESD Rating Human Body Model(3) 2kV (1) Absolute Maximum Ratings indicate limits beyond witch damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the Electrical Characteristics. (2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications. (3) The human body model is a 100 pF capacitor discharged through a 1.5 k Ω resistor to each pin. Operating Ratings VIN to GND +4.5V to +36V Junction Temperature −40°C to + 125°C Electrical Characteristics Unless otherwise stated, the following conditions apply: VVIN = 12V. Limits in standard type are for TJ = 25°C only, limits in bold face type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed 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. Symbol Parameter Conditions Min Typ Max Units VFB Feedback Pin Voltage VVIN = 4.5V to 36V 0.788 0.8 0.812 V RHSW-DS(ON) High-Side MOSFET On-Resistance ISW = 3A 130 225 m Ω RLSW-DS(ON) Low-Side MOSFET On-Resistance ISW = 3A 110 190 m Ω IQ Operating Quiescent Current VVIN = 4.5V to 36V 2.3 3 mA ISD Shutdown Quiescent Current VEN = 0V 150 180 µA VUVLO VIN Under Voltage Lockout Rising VVIN 4 4.25 4.5 V VUVLO(HYS) VIN Under Voltage Lockout Hysteresis 350 450 mV VVCC VCC Voltage IVCC = -5 mA, VEN = 5V 5.5 V ISS Soft-Start Pin Source Current VSS = 0V 2 5 7 µA VTRKACC Soft-Start/Track Pin Accuracy VSS = 0.4V -10 5 15 mV IBOOT BOOT Diode Leakage VBOOT = 4V 10 nA VF-BOOT BOOT Diode Forward Voltage IBOOT = -100 mA 0.9 1.1 V Powergood VFB(OVP) Over Voltage Protection Rising Threshold VFB(OVP) / VFB 107 110 112 % VFB(OVP-HYS) Over Voltage Protection Hysteresis ΔVFB(OVP) / VFB 2 3 % VFB(PG) PGOOD Threshold, VOUT Rising VFB(PG) / VFB 93 95 97 % VFB(PG-HYS) PGOOD Hysteresis ΔVFB(PG) / VFB 2 3 % TPGOOD PGOOD Delay 20 µs IPGOOD(SNK) PGOOD Low Sink Current VPGOOD = 0.5V 0.6 1 mA IPGOOD(SRC) PGOOD High Leakage Current VPGOOD = 5V 5 200 nA Oscillator FSW1 Switching Frequency 1 RRT = 49.9 kΩ 675 750 825 kHz FSW2 Switching Frequency 2 RRT = 249 kΩ 225 250 325 kHz 4 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Links: LM20343 |
同様の部品番号 - LM20343_14 |
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同様の説明 - LM20343_14 |
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