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LM25019MR Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM25019MR Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 28 page + + + VIN BST RON RTN SW VCC FB VIN VOUT RFB1 R R C UV1 RON COUT C C BST IN RFB2 RUV2 L1 UVLO CVCC LM25019 7.5 V - 48 V 1 2 3 4 5 6 8 7 SD Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM25019 SNVS952E – DECEMBER 2012 – REVISED NOVEMBER 2015 LM25019 48-V, 100-mA Constant On-Time Synchronous Buck Regulator 1 Features 3 Description The LM25019 is a 48-V, 100-mA synchronous step- 1 • Wide 7.5-V to 48-V Input Range down regulator with integrated high-side and low-side • Integrated 100-mA High-Side and MOSFETs. The constant on-time (COT) control Low-Side Switches scheme employed in the LM25019 requires no loop • No Schottky Required compensation, provides excellent transient response, and enables very high step-down ratios. The on-time • Constant On-Time Control varies inversely with the input voltage resulting in • No Loop Compensation Required nearly constant frequency over the input voltage • Ultra-Fast Transient Response range. A high-voltage start-up regulator provides bias power for internal operation of the IC and for • Nearly Constant Operating Frequency integrated gate drivers. • Intelligent Peak Current Limit A peak current limit circuit protects against overload • Adjustable Output Voltage From 1.225 V conditions. The undervoltage lockout (UVLO) circuit • Precision 2% Feedback Reference allows the input undervoltage threshold and • Frequency Adjustable to 1 MHz hysteresis to be independently programmed. Other protection features include thermal shutdown and • Adjustable Undervoltage Lockout bias supply undervoltage lockout. • Remote Shutdown The LM25019 is available in 8-pin WSON and 8-pin • Thermal Shutdown SO PowerPAD plastic packages. • Packages: – 8-Pin WSON Device Information(1) – 8-Pin SO PowerPAD™ PART NUMBER PACKAGE BODY SIZE (NOM) SO PowerPAD (8) 4.89 mm x 3.90 mm LM25019 2 Applications WSON (8) 4.00 mm x 4.00 mm • Industrial Equipments (1) For all available packages, see the orderable addendum at the end of the data sheet. • Smart Power Meters • Telecommunication Systems • Isolated Bias Supply Typical Application 1 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. |
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