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LM3495 数据表(PDF) 1 Page - Texas Instruments |
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LM3495 数据表(HTML) 1 Page - Texas Instruments |
1 / 35 page FB SNS FPWM PGND CSL LG ILIM SW/CSH HG BOOST CF RFB2 RFB1 CO RILIM CIN Q1 Q2 CB D1 VIN VO LM3495 SGND FREQ/SYNC COMP/SD VIN VLIN5 TRACK CDD CC RC RFRQ VLIN5 CSYNC L1 CINX LM3495 www.ti.com SNVS410E – FEBRUARY 2006 – REVISED NOVEMBER 2007 LM3495 Emulated Peak Current Mode Buck Controller for Low Output Voltage Check for Samples: LM3495 1 FEATURES • On-chip gate drivers • Soft output discharge during shutdown 2 • Input voltage from 2.9V to 18V • Startup into output pre-bias • Output voltage adjustable from 0.6V to 5.5V • Operation from a single input rail • Feedback Accuracy: ±1% • Adaptive Duty Cycle Limit • Low-side Sensing, Programmable Current Limit without sense resistor • TSSOP-16 package • Input Under Voltage Lockout APPLICATIONS • Hiccup mode current limit protection eliminates thermal runaway during fault • Wide input voltage buck converters with low conditions voltage, high accuracy outputs • Internal soft start with tracking capability • Core logic regulators • 200 kHz to 1.5 MHz Switching frequency, • High-efficiency buck regulation Synchronizable DESCRIPTION The LM3495 is a PWM buck regulator which implements a unique emulated peak current mode control. This control method eliminates the switching noise which typically limits current mode operation at extremely short duty cycles and high operating frequency. The switching frequency is programmable between 200 kHz and 1.5 MHz, and can also be synchronized to an external clock. The LM3495 is also very fault tolerant with both switch node short, hiccup mode, and adaptive duty cycle limit protection. A 0.6V 1% reference and glitch free pre-biased start-up ensure the most demanding digital loads operate reliably. Internal soft start and the ability to track the output of another supply make the LM3495 versatile and efficient. Typical Application 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 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2007, 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. |
类似零件编号 - LM3495 |
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类似说明 - LM3495 |
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