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LM25005 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM25005 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 28 page BST SW COMP FB SS RAMP RT VCC VIN OUT IS GND LM25005 VIN VOUT SD SYNC LM25005 www.ti.com SNVS411C – JANUARY 2006 – REVISED MARCH 2013 LM25005 42V, 2.5A Step-Down Switching Regulator Check for Samples: LM25005 1 FEATURES DESCRIPTION The LM25005 switching regulator features all of the 2 • Integrated 42V, 160m Ω N-Channel MOSFET functions necessary to implement an efficient, high • Ultra-Wide Input Voltage Range from 7V to 42V voltage buck regulator using a minimum of external • Internal Bias Regulator components. This easy to use regulator includes a 42V, 160m Ω, N-channel MOSFET, with an output • Adjustable Output Voltage from 1.225V current capability of 2.5 Amps. The regulator control • 1.5% Feedback Reference Accuracy method is based upon current mode control utilizing • Current Mode Control with Emulated Inductor an emulated current ramp. Current mode control Current Ramp provides inherent line voltage feed-forward, cycle-by- cycle current limiting and ease of loop compensation. • Single Resistor Oscillator Frequency Setting The use of an emulated control ramp reduces noise • Oscillator Synchronization Input sensitivity of the pulse-width modulation circuit, • Programmable Soft-Start allowing reliable control of very small duty cycles necessary in high input voltage applications. The • Shutdown / Standby Input operating frequency is programmable from 50kHz to • Wide Bandwidth Error Amplifier 500kHz. An oscillator synchronization pin allows • Thermal Shutdown multiple LM25005 regulators to self-synchronize or to be synchronized to an external clock. Additional protection features include: current limit, thermal shutdown and remote shutdown capability. The device is available in a power enhanced HTSSOP package featuring an exposed die attach pad to aid thermal dissipation. Package • HTSSOP (Exposed Pad) Simplified Application Schematic 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 © 2006–2013, 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. |
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