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LM2744 データシート(PDF) 4 Page - Texas Instruments |
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LM2744 データシート(HTML) 4 Page - Texas Instruments |
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4 / 32 page  LM2744 SNVS292E – SEPTEMBER 2004 – REVISED JANUARY 2012 www.ti.com Electrical Characteristics VCC = 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA= TJ= 25°C. Limits appearing in boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Symbol Parameter Conditions Min Typ Max Units VON UVLO Thresholds Rising 2.76 V Falling 2.42 VCC = 3.3V, VSD = 3.3V 1.0 1.5 2.1 Fsw = 600kHz Operating VCC Current mA IQ_VCC VCC = 5V, VSD = 3.3V 1.0 1.7 2.1 Fsw = 600kHz Shutdown VCC Current VCC = 3.3V, VSD = 0V 1 25 µA tPWGD1 PWGD Pin Response Time VFB Rising 6 µs tPWGD2 PWGD Pin Response Time VFB Falling 6 µs ISS-ON SS Pin Source Current VSS = 0V 5 10 15 µA ISS-OC SS Pin Sink Current During Over VSS = 2.5V 90 µA Current ISEN-TH ISEN Pin Source Current Trip Point 20 40 60 µA ERROR AMPLIFIER VOS Error Amplifier Input Offset Voltage -8 1 8 mV GBW Error Amplifier Unity Gain 9 MHz Bandwidth G Error Amplifier DC Gain 106 dB SR Error Amplifier Slew Rate 3.2 V/µs IEAO EAO Pin Current Sourcing and VEAO = 1.5, FB = 0.55V 2.6 mA Sinking Capability VEAO = 1.5, FB = 0.65V 9.2 VEA Error Amplifier Output Voltage Minimum 1 V Maximum 2 V IVREF Current into VREF Pin 1.5V ≥ VREF ≥ 0.5V 50 nA GATE DRIVE IQ-BOOT BOOT Pin Quiescent Current VBOOT = 12V, VSD = 0 18 90 µA RHG_UP High-Side MOSFET Driver Pull-Up VBOOT - VSW = 9.5V@350mA 3 Ω ON resistance RHG_DN High-Side MOSFET Driver Pull- VBOOT - VSW = 4.5V@350mA 2 Ω Down ON resistance RLG_UP Low-Side MOSFET Driver Pull-Up VBOOT - VSW = 9.5V@350mA 3 Ω ON resistance RLG_DN Low-Side MOSFET Driver Pull- VBOOT - VSW = 4.5V@350mA 2 Ω Down ON resistance OSCILLATOR RFADJ = 702.1 kΩ 50 RFADJ = 98.74 kΩ 300 FSW PWM Frequency kHz RFADJ = 45.74 kΩ 475 600 725 RFADJ = 24.91 kΩ 1000 D Max High-Side Duty Cycle FSW = 300kHz 80 % FSW = 600kHz 76 FSW = 1MHz 73 LOGIC INPUTS AND OUTPUTS V STBY-IH Standby High Trip Point VFB = 0.575V, VBOOT = 3.3V, VSD 1.1 V Rising V STBY-IL Standby Low Trip Point VFB = 0.575V, VBOOT = 3.3V, VSD 0.232 V Falling V SD-IH SD Pin Logic High Trip Point VSD Rising 1.3 V V SD-IL SD Pin Logic Low Trip Point VSD Falling 0.8 V 4 Submit Documentation Feedback Copyright © 2004–2012, Texas Instruments Incorporated Product Folder Links: LM2744 |
同様の部品番号 - LM2744 |
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同様の説明 - LM2744 |
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