LM3243TMX/NOPB ,2.7MHz, 2.5A Step-Down DC-DC Converter with Analog Bypass Mode for 2G/3G/4G PAs 16-DSBGA -30 to 90Features 3 DescriptionThe LM3243 is a DC-DC converter optimized for1• Input Voltage Range: 2.7 V to ..
LM324A ,Quad Operational AmplifierLM124ALM224A - LM324ALOW POWER QUAD OPERATIONAL AMPLIFIERS ■ WIDE GAIN BANDWIDTH : 1.3MHz ■ LA ..
LM324A ,Quad Operational Amplifier
LM324A ,Quad Operational AmplifierABSOLUTE MAXIMUM RATINGS Symbol Parameter LM124A LM224A LM324A UnitVSupply voltage ±16 or 32 ..
LM324A ,Quad Operational AmplifierABSOLUTE MAXIMUM RATINGS Symbol Parameter LM124A LM224A LM324A UnitVSupply voltage ±16 or 32 ..
LM324A ,Quad Operational AmplifierLM124ALM224A - LM324ALOW POWER QUAD OPERATIONAL AMPLIFIERS ■ WIDE GAIN BANDWIDTH : 1.3MHz ■ LA ..
LMC6462AIM ,Dual Micropower, Rail-to-Rail Input and Output CMOS Operational AmplifierFeatures- Low offset voltage. 500uV - Ultra low supply current. ..
LMC6462AIMX/NOPB ,Dual Micropower, Rail-to-Rail Input and Output CMOS Operational Amplifier 8-SOIC -40 to 85Electrical Characteristics (continued)+− +Unless otherwise specified, all limits ensured for T = 25 ..
LMC6462AIN ,Dual Micropower, Rail-to-Rail Input and Output CMOS Operational Amplifierfeatures, plus its low power consumption, make the LMC6462 ideally suited forbattery powered
LMC6462BIM ,Dual Micropower, Rail-to-Rail Input and Output CMOS Operational AmplifierMICROCIRCUIT DATA SHEETOriginal Creation Date: 04/03/96MNLMC6462AM-X REV 1A1Last Update Date: 05/19 ..
LMC6462BIMX ,Dual Micropower, Rail-to-Rail Input and Output CMOS Operational AmplifierGeneral DescriptionThe LMC6462 is a dual low offset voltage amplifier, combining rail-to-rail Input ..
LMC6462BIMX/NOPB ,Dual Micropower, Rail-to-Rail Input and Output CMOS Operational Amplifier 8-SOIC -40 to 85FEATURES DESCRIPTIONThe LMC6462/4 is a micropower version of the2• (Typical Unless Otherwise Noted) ..
LM3243TMX/NOPB
2.7MHz, 2.5A Step-Down DC-DC Converter with Analog Bypass Mode for 2G/3G/4G PAs
PVIN VDD SW
VCON PGND SGND
MODE
VBATT
VOUT
ACB
VCC_PA_2G
BGND
1.5 μH
10 μF
1.0 μF
4.7 μF
VCC_PA_3G
10 μF
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LM3243SNVS782C –OCTOBER 2010–REVISED AUGUST 2015
LM3243 High-Current Step-Down Converter for 2G, 3G, and 4G RF Power Amplifiers Features 3 DescriptionThe LM3243isa DC-DC converter optimized for Input Voltage Range: 2.7Vto 5.5V powering multi-mode 2G, 3G, and 4G RF power• High-Efficiency PFM and PWM Modes With amplifiers (PAs) froma single Lithium-Ion cell. TheInternal Synchronous Rectification LM3243 steps down an input voltage from 2.7Vto Analog Bypass Function with Low Dropout 5.5Vtoa dynamically adjustable output voltageof
0.4Vto 3.6V. The output voltageis set throughaResistance (45 mΩ Typical)
VCON analog input that adjusts the output voltageto• Dynamically Adjustable Output Voltage: 0.4Vto ensure efficient operationat all power levelsof the3.6V (Typical)in PFM and PWM Modes RF PA.• Maximum Load Current: 2.5Ain PWM Mode The LM3243 operatesin constant frequency PWM• PWM Switching Frequency: 2.7 MHz (Average) mode producinga small and predictable amountof• Modulated Switching Frequencyto Aid Rx Band output voltage ripple. This enables best ECTELCompliance power requirementsin GMSK and EDGE spectral
compliance, with the minimal amountof filtering and• Operates Froma Single Li-ion Cell
excess headroom. When operatingin PFM mode, the(2.7Vto 5.5V) LM3243 enables the lowest DG09 current• Current and Thermal Overload Protection consumption and therefore maximizes system• ACB Reduces Inductor Requirements and Size efficiency. Minimum Total Solution Sizeby Using Small The LM3243 hasa unique Active Current assist andFootprint and Case Size Inductor and Capacitors analog Bypass (ACB) feature to minimize inductor
size without any lossof output regulation for the
2 Applications entire battery voltage and RF output power range,
until dropout. ACB providesa parallel current path,• Cellular Phones when needed,to limit the maximum inductor current• Hand-Held Radios to 1.4A (typical) while still drivinga 2.5-A load. The RF PC Cards ACB also enables operation with minimal dropout
voltage. When considering using the LM3243ina• Battery-Powered RF Devices system design, see the Layout sectionof this data
sheet.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical System Application Diagram
