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LM2738XMY 数据表(PDF) 1 Page - Texas Instruments |
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LM2738XMY 数据表(HTML) 1 Page - Texas Instruments |
1 / 40 page LM2738 VIN VIN EN BOOST SW FB GND VOUT C3 L1 C1 C2 R1 R2 D1 D2 ON OFF Product Folder Sample & Buy 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. LM2738 SNVS556C – APRIL 2008 – REVISED JANUARY 2016 LM2738 550-kHz/1.6-MHz 1.5-A Step-Down DC-DC Switching Regulator 1 1 Features 1 • Space-Saving WSON and MSOP-PowerPAD™ Packages • 3-V to 20-V Input Voltage Range • 0.8-V to 18-V Output Voltage Range • 1.5-A Output Current • 550-kHz (LM2738Y) and 1.6-MHz (LM2738X) Switching Frequencies • 250-m Ω NMOS Switch • 400-nA Shutdown Current • 0.8-V, 2% Internal Voltage Reference • Internal Soft-Start • Current-Mode, PWM Operation • Thermal Shutdown 2 Applications • Local Point of Load Regulation • Core Power in HDDs • Set-Top Boxes • Battery Powered Devices • USB Powered Devices • DSL Modems 3 Description The LM2738 regulator is a monolithic, high- frequency, PWM step-down DC-DC converter in an 8- pin WSON or 8-pin MSOP-PowerPAD package. It provides all the active functions for local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LM2738 is easy to use. The ability to drive 1.5-A loads with an internal 250-m Ω NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. Switching frequency is internally set to 550 kHz (LM2738Y) or 1.6 MHz (LM2738X), allowing the use of extremely small surface-mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External enable is included, featuring an ultralow standby current of 400 nA. The LM2738 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce in-rush current, cycle-by-cycle current limit, thermal shutdown, and output over-voltage protection. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM2738 WSON (8) 3.00 mm × 3.00 mm MSOP-PowerPAD (8) 3.00 mm × 3.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Circuit Efficiency vs Load Current VIN = 12 V, VOUT = 3.3 V |
类似零件编号 - LM2738XMY |
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类似说明 - LM2738XMY |
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