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LM25141RGER 데이터시트(PDF) 1 Page - Texas Instruments |
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LM25141RGER 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 50 page VOUT RES AGND SS COMP PGND VOUT CS LO SW HO HB VIN LM5141-Q1 VIN VCC HOL LOL EN OSC DEMB VCCX VDDA PG FB RT DITH CBST DBST COUT LOUT RSENSE CIN CRES CSS CDITH RT CVDDA CVCC RCOMP CCOMP Copyright © 2016, Texas Instruments Incorporated Product Folder Order Now Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM25141 SNVSAU1 – MARCH 2017 LM25141 Wide Input Range Synchronous Buck Controller 1 1 Features 1 • –40ºC to +125ºC Ambient Operating Temperature Range • An AEC-Q100 Qualified Device is Available • VIN 3.8 V to 45 V (47 V Absolute Maximum) • Output: Fixed 3.3 V, 5 V, or Adjustable From 1.5 V - 15 V with ±0.8% Accuracy • Fixed 2.2 MHz or 440 kHz Switching Frequency with ±5% Accuracy • High-Side and Low-Side Gate Drive With Slew Rate Control • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor • Optional Synchronization to an External Clock • Optional Spread Spectrum • Shutdown Mode IQ: 10 µA Typical • Low Standby Mode IQ: 35 µA Typical • 75 mV Current Limit Threshold with ±0.9% Accuracy • External Resistor or DCR Current Sensing • Output Enable Logic Input • Hiccup Mode for Sustained Overload • Power Good Indication Output • Selectable Diode Emulation or Forced Pulse Width Modulation • QFN-24 Package with Wettable Flanks • Create a Custom Design Using the LM25141 With the WEBENCH® Power Designer • 2 Applications • Medical Equipment • Industrial Programmable Logic Controller • Industrial PC • Embedded PC 3 Description The LM25141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141 features slew rate control to simplify the compliance with EMI requirements. The LM25141 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Drivers with Slew Rate Control that can be adjusted to reduce EMI. In light or no-load conditions, the LM25141 operates in skip cycle mode for improved low power efficiency. The LM25141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM25141 QFN (24) 4.00 mm × 4.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Schematic |
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