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LM27403 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM27403 bảng dữ liệu(HTML) 1 Page - Texas Instruments |
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1 / 49 page  1 2 3 4 5 6 7 8 9 10 11 12 18 17 16 15 14 13 24 23 CBOOT HG SW LG VDD GND SS/TRACK RS FB COMP FADJ SYNC VIN VOUT+ VOUT± LM27403 VOUT+ VIN D+ D± VDD GND LM27403 www.ti.com SNVS896 A – AUGUST 2013 – REVISED SEPTEMBER 2013 Synchronous Buck Controller with Temperature-Compensated, Inductor-DCR-Based Overcurrent Protection and Programmable Thermal Shutdown Check for Samples: LM27403 1 FEATURES APPLICATIONS 2 • Up to 97% Efficiency and 93% Duty Cycle • DC-DC Converters • Wide Input Voltage Range of 3 V to 20 V • High Power Density POL Modules • Switching Frequency from 200 kHz to 1.2 MHz • Telecommunications Infrastructure • Inductor-DCR-Based Overcurrent Protection • Embedded Computing, Servers, Storage with Thermal Compensation DESCRIPTION • 0.6-V Reference with 1% Feedback Accuracy The LM27403 is a feature-rich, easy-to-use, • 30-ns Min On-Time for Low VOUT synchronous buck controller offering exceptional • Integrated High-Current MOSFET Drivers levels of integration and performance for superior – Adaptive Deadtime Control efficiency in high power density, point-of-load (POL) DC-DC regulator solutions. The resistor- • Ultrafast Line and Load Transient Response programmable switching frequency from 200 kHz to – High GBW Error Amplifier 1.2 MHz and integrated, high-current MOSFET gate – PWM Line Feedforward drivers with adaptive deadtime offer flexibility to optimize solution size and maximize conversion • Integrated VDD Bias Supply LDO Subregulator efficiency. • Programmable System-Level OTP High precision and low output voltage are easily • Precision Enable with Hysteresis obtained with a 0.6-V, 1% accurate voltage reference • Frequency Synchronization together with a 30-ns high-side MOSFET minimum • Monotonic Prebiased Startup with Soft-Start controllable on-time. Using lossless inductor dc resistance (DCR) current sensing and an inexpensive • Open-Drain Power Good Indicator 2N3904 BJT to sense temperature remotely at the • 4 mm x 4 mm, WQFN-24 PowerPAD™ Package inductor, the LM27403 supports accurate and thermally-compensated overcurrent protection (OCP). TYPICAL APPLICATION DIAGRAM 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 and Power Block NexFET is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Số phần tương tự - LM27403 |
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Mô tả tương tự - LM27403 |
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