Datasheet > LM3290

LM3290

更新时间： 2024-11-12 12:49:51

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LM3290

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LM3290 数据手册

LM3290

www.ti.com

SNVSA11 –AUGUST 2013

LM3290 Product Brief

FEATURES

DESCRIPTION

The LM3290, with its companion IC LM3291, is an

RF envelope supply modulator (EM) with integrated

DC-DC boost converter optimized for Envelope

Tracking (ET) RF power amplifiers (PAs). The device

enables maximum transmit output power independent

of the input battery voltage (battery as low as 2.5 V)

and is controlled by the system by MIPI^®RFFE 1.1.

•

V_{OUT_RANGE}

–

V_{OUT_ET}= 0.6 V to 4.5 V

V_{OUT_APT}= 0.4 V to 3.81 V (or V_IN– 200 mV)

•

DC BOOST FOR ET OPERATION:

–

Boost Input Voltage Range: 2.5 V to 5 V

High-Efficiency (90% typical) with Internal

Synchronous Rectification

The LM3290 operates in two active modes:

1. For low TX output power, LM3290 may operate in

Average Power Tracking (APT) mode, providing a

static, but programmable, output voltage to

supply the PA. At light load and in APT mode, the

LM3290 enters into Pulse Frequency Mode

(PFM) operation automatically and operates with

reduced switching frequency. In PFM mode, the

quiescent current is reduced, which extends the

battery life.

–

Boost Bypass Function with Low

Resistance (150 mΩ typ.)

2.7 MHz PWM Switching Frequencies

•

BUCK DC-DC FOR APT AND ET OPERATION:

–

High Operating Frequency for Small

External Inductors and Capacitors

V_{OUT_RANGE}= 0.6 V to min of 3.81 V and

V_IN– 200 mV

2. In ET mode, the LM3290 with LM3291 efficiently

High-Efficiency (95% typical) with Internal

Synchronous Rectification

provides

dynamic, high-bandwidth supply

voltage for the PA to maximize total EM + PA

efficiency. The envelope modulator follows the

envelope reference input signal delivered by the

RFIC to the LM3291 via a differential analog

input. The output is a single-ended power supply

signal to the PA.

Low-Power PFM Mode

•

LM3291 CONTROL:

Automatic Control of LM3291 in ET Mode

RFFE CONTROL INTERFACE:

–

1.8 V MIPI^®RFFE 1.1-Compatible Digital

Control Interface

The LM3290 and LM3291 support 3G, as well as LTE

operation up to 20-MHz signal bandwidth.

–

26 MHz Write Capability

13 MHz Read Capability

MIPI eTrak

The LM3290 controls the LM3291 companion-IC

through direct control signals, and no additional

controls are needed from the system. Shutdown,

standby, and idle modes turn the EM off and reduce

battery current consumption.

2.5V - 5V

BATTERY

For the full datasheet, samples, or the EVM

hardware and software please contact

representative at ET@list.ti.com.

a TI

LM3291

LM3290

RFIC

BBIC

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.

MIPI is a registered trademark of Mobile Industry Processor Interface Alliance.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3

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与LM3290相关器件

型号	品牌	获取价格	描述	数据表
LM3290TME/NOPB	TI	获取价格	LM3290 Product Brief
LM3290TMX/NOPB	TI	获取价格	LM3290 Product Brief
LM3291	TI	获取价格	LM3291 Product Brief
LM3291TMENOPB	TI	获取价格	LM3291 Product Brief
LM3291TMXNOPB	TI	获取价格	LM3291 Product Brief
LM329ACH	Linear	获取价格	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.9 V, MBCY2
LM329ACZ	Linear	获取价格	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.9 V, PBCY3
LM329AH	Linear	获取价格	6.9V Precision Voltage Reference
LM329AH	NSC	获取价格	Precision Reference
LM329AH#PBF	Linear	获取价格	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.9 V, MBCY2

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