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LM3673 датащи(PDF) 1 Page - Texas Instruments |
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LM3673 датащи(HTML) 1 Page - Texas Instruments |
1 / 28 page 1 2 5 4 3 VIN SW FB EN GND L1: 2.2 µH VOUT COUT 10 µF CIN 4.7 µF LM3673 VIN 2.7 V to 5.5 V 1 2 5 4 3 VIN SW FB EN GND L1: 2.2 µH VOUT COUT 10 µF CIN 4.7 µF LM3673- ADJ VIN 2.7 V to 5.5 V R1 R2 C1 C2 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3673 SNVS434L – JULY 2006 – REVISED OCTOBER 2015 LM3673 2-MHz, 350-mA Step-Down DC-DC Converter 1 Features 3 Description The LM3673 step-down DC-DC converter is 1 • 16-µA Typical Quiescent Current optimized for powering low voltage circuits from a • 350-mA Maximum Load Capability single Li-Ion cell battery and input voltage rails from • 2-MHz PWM Fixed Switching Frequency (Typical) 2.7 V to 5.5 V. It provides up to 350-mA load current over the entire input voltage range. There are several • Automatic PFM/PWM Mode Switching different fixed voltage output options available, as • Available in Fixed and Adjustable Output Voltages well as an adjustable output voltage version ranging • Internal Synchronous Rectification for High from 1.1 V to 3.3 V. Efficiency The device offers superior features and performance • Internal Soft Start for mobile phones and similar portable systems. The • 0.01-µA Typical Shutdown Current LM3673 uses intelligent automatic switching between pulse width modulation (PWM) and pulse frequency • Operates From a Single Li-Ion Cell Battery modulation (PFM) for better efficiency. During PWM • Current Overload and Thermal Shutdown mode, the device operates at a fixed-frequency of Protection 2 MHz (typical). Hysteretic PFM mode extends the • Only Three Tiny Surface-Mount External battery life by reducing the quiescent current to 16 µA Components Required (One Inductor, Two (typical) during light load and standby operation. Ceramic Capacitors) Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery 2 Applications consumption to 0.01 µA (typical). • Mobile Phones The LM3673 is available in a tiny 5-pin DSBGA • PDAs package. A high switching frequency of 2 MHz • MP3 Players (typical) allows the use of three tiny surface-mount • W-LAN components: an inductor and two ceramic capacitors. • Portable Instruments Device Information(1) • Digital Still Cameras PART NUMBER PACKAGE BODY SIZE (MAX) • Portable Hard Disk Drives LM3673 DSBGA (5) 1.413 mm × 1.083 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Circuit for ADJ Version Typical Application Circuit 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. |
Аналогичный номер детали - LM3673 |
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Аналогичное описание - LM3673 |
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