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LM3291TMXNOPB Datasheet(PDF) 1 Page - Texas Instruments |
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LM3291TMXNOPB Datasheet(HTML) 1 Page - Texas Instruments |
1 / 3 page 2.5V - 5V L C MIPI eTrak LM3290 RFIC or BBIC BATTERY LM3291 LM3291 www.ti.com SNVSA12 – SEPTEMBER 2013 LM3291 Product Brief 1 FEATURES DESCRIPTION The LM3291 is a high-speed linear amplifier that, with 23 • Highly Programmable High-Current Linear its companion IC LM3290, constitutes an RF Amplifier Envelope Modulator (EM) for supplying 3G/4G Power • > 75 MHz Typical Small Signal Bandwidth Amplifiers (PA) in envelope tracking systems. The • Extremely Low Output Impedance amplifier provides extremely low output impedance and low output noise over a wide bandwidth. • High Linearity In conjunction with an Envelope Tracking (ET) • Differential Analog Input Compatible with capable RFIC and PA, the LM3291 and LM3290 eTrak 1.0 Standard greatly improve PA efficiency for 3G and LTE • Low Output Noise operation. • When paired with the LM3290 provides a In ET mode, the LM3291 and LM3290 provide complete Envelope Modulator solution for envelope tracking supply voltage for the PA 3G/4G Envelope Tracking Power Amplifiers. maximizing total EM + PA efficiency. The envelope • Automatically controlled through LM3290 in an modulator follows the differential envelope reference envelope modulation solution using MIPI® input signal delivered by the RFIC to the LM3291. RFFE 1.1-compatible interface. The output is a single-ended dynamic power supply voltage to the PA. APPLICATIONS The LM3291 supports 3G and LTE operation up to 20 • 3G/LTE Handsets MHz signal bandwidth. • 3G//LTE Tablets The LM3291’s programmable parameters are controlled by LM3290 via a direct serial interface • 3G/LTE Data Cards and Wireless Modems between the two devices. No additional controls are needed in the system. This interface provides flexible control and adjustment options to optimize LM3291 efficiency and noise performance for various frequency bands and power levels. At high TX output power, the EM can be operated in ET mode where LM3290 and LM3291 together modulate the supply of the PA with the envelope signal to improve overall system efficiency. At low TX output power, the EM can be transitioned to Average Power Tracking (APT) mode where LM3291 is placed into shutdown mode to improve system efficiency. The LM3291 is available in a 12-pin lead-free DSBGA package. For the full datasheet, samples, or the EVM hardware and software please contact a TI representative at ET@list.ti.com. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 MIPI is a registered trademark of Mobile Industry Processor Interface Alliance. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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