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LM25119 データシート(PDF) 1 Page - Texas Instruments |
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LM25119 データシート(HTML) 1 Page - Texas Instruments |
1 / 39 page VOUT2 SS2 RES RT AGND SS1 UVLO COMP2 FB2 VOUT1 VIN RAMP2 PGND2 CSG2 CS2 LO2 SW2 HO2 HB2 VCC2 VIN LM25119 VIN COMP1 FB1 RAMP1 PGND1 CSG1 CS1 LO1 SW1 HO1 HB1 VCC1 Copyright © 2016, Texas Instruments Incorporated Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design 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. LM25119, LM25119-Q1 SNVS680H – AUGUST 2010 – REVISED MAY 2016 LM25119, LM25119-Q1 Wide Input Range, Dual Synchronous Buck Controller 1 1 Features 1 • LM25119-Q1 Qualified for Automotive Applications • AEC-Q100 Qualified With the Following Results: – Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range – Device HBM ESD Classification Level 1C – Device CDM ESD Classification Level C4A • Emulated Peak Current Mode Control • Wide Operating Range (4.5 V to 42 V) • Easily Configurable for Dual Outputs or Interleaved Single Output • Robust 3.3-A Peak Gate Drive • Switching Frequency Programmable to 750 kHz • Optional Diode Emulation Mode • Programmable Output From 0.8 V • Precision 1.5% Voltage Reference • Programmable Current Limit • Hiccup Mode Overload Protection • Programmable Soft-Start • Programmable Line Undervoltage Lockout • Automatic Switch-Over to External Bias Supply • Channel2 Enable Logic Input • Thermal Shutdown • Leadless 32-Pin WQFN Package 2 Applications • Automotive Infotainment • Industrial DC-DC Motor Drivers • Automotive USB Accessory Adapters • Telecom: Servers and Routers 3 Description The LM25119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease- of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse- width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM25119 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM25119, LM25119-Q1 WQFN (32) 5.00 mm × 5.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Circuit |
同様の部品番号 - LM25119_16 |
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同様の説明 - LM25119_16 |
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