Datenblatt-Suchmaschine für elektronische Bauteile |
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LM3743 Datenblatt(PDF) 4 Page - Texas Instruments |
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LM3743 Datenblatt(HTML) 4 Page - Texas Instruments |
4 / 38 page LM3743 SNVS427E – SEPTEMBER 2006 – REVISED APRIL 2013 www.ti.com Electrical Characteristics (continued) VCC = 3.3V, COMP/EN floating unless otherwise indicated in the conditions column. Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. 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. Symbol Parameter Conditions Min Typ Max Units RHG-UP High Side MOSFET Driver Pull-up ON VBOOT-VSW = 3.3V, IHGATE = 350mA 1.6 Ω resistance (sourcing) RHG-DN High Side MOSFET Driver Pull-down ON VBOOT-VSW = 3.3V, IHGATE = 350mA 1 Ω resistance (sinking) RLG-UP Low Side MOSFET Driver Pull-up ON VCC = 3.3V, ILGATE = 350mA (sourcing) 1.6 Ω resistance RLG-DN Low Side MOSFET Driver Pull-down ON VCC = 3.3V, ILGATE = 350mA (sinking) 1 Ω resistance OSCILLATOR fSW Oscillator Frequency 3.0V ≤ VCC ≤ 5.5V, LM3743-300 255 300 345 kHz 3.0V ≤ VCC ≤ 5.5V, LM3743-1000 850 1000 1150 DMAX Max Duty Cycle fSW = 300 kHz, LM3743-300 85 91 % fSW = 1 MHz, LM3743-1000 69 76 VRAMP PWM Ramp Amplitude 1.0 V LOGIC INPUTS AND OUTPUTS VCOMP/EN-HI COMP/EN pin logic high trip-point 0.65 0.9 V VCOMP/EN-LO COMP/EN pin logic low trip-point 0.1 0.45 V HICCUP MODE NLSCYCLES Low-side sensing cycles before hiccup mode 15 Cycles NLSRESET Low-side sensing cycles reset without 32 Cycles activating current limit VUVP Under Voltage Protection comparator 400 mV threshold tGLICH-UVP Under Voltage Protection fault time before 7 µs hiccup mode tHICCUP Hiccup timeout 5.5 ms tSS Soft-start time coming out of hiccup mode 3.6 ms THERMAL RESISTANCE θJA Junction to Ambient Thermal Resistance 235 °C/W 4 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LM3743 |
Ähnliche Teilenummer - LM3743_15 |
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Ähnliche Beschreibung - LM3743_15 |
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