Datenblatt-Suchmaschine für elektronische Bauteile |
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LM3279 Datenblatt(PDF) 1 Page - Texas Instruments |
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LM3279 Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 37 page 0 100 200 300 400 500 600 700 40 50 60 70 80 90 100 OUTPUT LOAD (mA) PVIN = 2.7V PVIN = 3.0V PVIN = 3.6V PVIN = 4.2V 1.5 ÛH PVIN SVIN EN SGND PGND SW1 SW2 LM3279 VOUT FB VCON VOUT: 0.4V to 4.2V 10 ÛF 10 ÛF VBATT: 2.7V to 5.5V GPO0 GPO1 BB or RFIC VIO SDATA SCLK DGND RF Control Bits RF PA(s) 2 x 0.47 ÛF (PA decoupling caps) Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3279 SNVS970C – MARCH 2013 – REVISED OCTOBER 2014 LM3279 Buck-Boost Converter With MIPI® RFFE Interface for 3G And 4G RF Power Amplifiers 1 Features 3 Description The LM3279 is a buck-boost DC/DC converter 1 • MIPI® RFFE Digital Control Interface designed to generate output voltages above or below • High-Efficiency PFM and PWM Modes with a given input voltage and is particularly suitable for Internal Seamless Transition Power Amplifiers operating from single-cell Li-Ion • Operates from a Single Li-Ion Cell: 2.7 V to 5.5 V batteries in portable applications. • Adjustable Output Voltage: The LM3279 has four modes of operation: Pulse Width Modulation (PWM), Pulse Frequency – RFFE Digital Control: 0.4 V to 4.2 V Modulation (PFM), standby, and shutdown. During – Analog Control: 0.5 V to 4.2 V normal conditions, the LM3279 operates in full • 1-A Maximum Load Capability for VBATT ≥ 3.2 V, synchronous PWM mode at 2.4-MHz typical switching VOUT = 3.6 V frequency, providing seamless transitions between • 2.4-MHz (typ.) Switching Frequency buck and boost operating regimes. Energy-saving PFM mode increases efficiencies and current savings • Seamless Buck-Boost Mode Transition during low-power RF transmission modes. For high- • Fast Output Voltage Transition: 0.8 V to 4 V in 20 transmit power, the device operates in PWM buck or µs boost mode, whereas the device can transition • High-Efficiency: 95% typ. at VBATT = 3.7 V, between PWM and PFM modes during low-power transmit. The LM3279 can be controlled either via an VOUT = 3.3 V, at 300 mA included MIPI RFFE Digital Control Interface or by • Input Overcurrent Limit using an analog control from an external MCU, • Output Overvoltage Clamp offering design flexibility. • Internal Compensation The power converter topology enables minimum total solution size by using one small footprint and case 2 Applications size inductor and two surface mount capacitors. • 3G/4G Smartphones The LM3279 is internally compensated for buck and • RF PC Cards boost modes of operation thus providing an optimal transient response. • Tablets, eBooks Readers • Battery-Powered RF Devices Device Information(1) PART NUMBER PACKAGE BODY SIZE (MAX) LM3279 DSBGA (16) 2.529 mm x 2.146 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Schematic PWM Efficiency (VOUT = 2.4 V) 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. |
Ähnliche Teilenummer - LM3279_16 |
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Ähnliche Beschreibung - LM3279_16 |
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