Datasheet > MAX8896

MAX8896

更新时间： 2024-11-24 14:57:31

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
17页	449K
描述
双通道PWM降压型转换器，采用2mm x 2mm封装，适用于WCDMA PA和RF电源

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数据手册

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MAX8896 数据手册

19-4663; Rev 0; 5/09

Dual PWM Step-Down Converter in a 2mm x

2mm Package for WCDMA PA and RF Power

MAX896

General Description

Features

The MAX8896 dual step-down converter is optimized

for powering the power amplifier (PA) and RF transceiv-

er in WCDMA handsets. This device integrates a high-

efficiency PWM step-down converter (OUT1) for

medium and low-power transmission, and a 140mΩ

(typ) bypass FET to power the PA directly from the bat-

tery during high-power transmission. A second high-

efficiency PWM step-down converter (OUT2) supplies

power directly to a high PSRR, low output noise, 200mA

low-dropout linear regulator (LDO) to power the RF

transceiver.

o PA Step-Down Converter (OUT1)

7.5µs (typ) Settling Time for 0.5V to 1V Output

Voltage Change

Dynamic Output Voltage Setting from 0.5V to

BATT

140mΩ Bypass PFET and 100% Duty Cycle

for Low Dropout

2MHz Switching Frequency

Low Output Voltage Ripple

700mA (min) Output Drive Capability

2% Gain Accuracy

Fast switching allows the use of small ceramic input and

output capacitors while maintaining low ripple voltage.

The feedback network is integrated reducing external

component count and total solution size. OUT1 uses an

analog input driven by an external DAC to control the

output voltage linearly for continuous PA power adjust-

ment. At high duty cycle, OUT1 automatically switches to

bypass mode, connecting the input to the output through

a low-impedance (140mΩ, typ) MOSFET.

Tiny External Components

o RF Step-Down Converter (OUT2)

2MHz Fixed Switching Frequency

94% Peak Efficiency

100% Duty Cycle

2% Output Accuracy Over Load, Line, and

Temperature

200mA (min) Output Drive Capability

Tiny External Components

OUT2 is a 2MHz fixed-frequency, step-down converter

capable of operating at 100% duty cycle. Output accu-

racy is 2% over load, line, and temperature. The out-

put of OUT2 is preset to 3.1V to provide power to a

o Low-Noise LDO

Guaranteed 200mA Output

High 65dB (typ) PSRR

Fixed Output Voltage

200mA, 2.8V LDO designed for low noise (16µV

RMS

typ), high PSRR (65dB, typ) operation. This configura-

tion provides noise attenuation for the RF transceiver

power supply in the 100Hz to 100kHz range.

Low Noise (16µV

, typ)

RMS

o Simple Logic ON/OFF Controls

o Low 0.1µA Shutdown Current

o 2.7V to 5.5V Supply Voltage Range

o Thermal Shutdown

Other features include separate output enables, low-

supply current shutdown, output overcurrent, and

overtemperature protection. The MAX8896 is available

in a 16-bump, 2mm x 2mm UCSP™ package (0.7mm

max height).

o 2mm x 2mm UCSP Package (4 x 4 Grid)

Applications

WCDMA/NCDMA Cellular Handsets

Ordering Information

LDO

VOLTAGE

Smartphones

PART

PIN-PACKAGE

MAX8896EREE+T

16 UCSP (0.5mm pitch)

2.80V

Note: Device operates over the -40°C to +85°C temperature

range.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

Pin Configurations appear at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products

For information on other Maxim products, visit Maxim’s website at www.maxim-ic.com.

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与MAX8896相关器件

型号	品牌	获取价格	描述	数据表
MAX8896EREE+T	MAXIM	获取价格	Dual PWM Step-Down Converter in a 2mm x 2mm Package for WCDMA PA and RF Power
MAX889RESA	MAXIM	获取价格	High-Frequency, Regulated, 200mA, Inverting Charge Pump
MAX889RESA+	MAXIM	获取价格	Switched Capacitor Regulator, 0.2A, 2500kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 INCH,
MAX889RESA+T	MAXIM	获取价格	暂无描述
MAX889RESA-T	MAXIM	获取价格	Switched Capacitor Regulator, 0.2A, 2500kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 INCH,
MAX889SESA	MAXIM	获取价格	High-Frequency, Regulated, 200mA, Inverting Charge Pump
MAX889SESA+	MAXIM	获取价格	Switched Capacitor Regulator, 0.2A, 1250kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 INCH,
MAX889SESA+T	MAXIM	获取价格	Switched Capacitor Regulator, 0.2A, 1250kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 INCH,
MAX889SESA-T	MAXIM	获取价格	Switched Capacitor Regulator, 0.2A, 1250kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 INCH,
MAX889SEVKIT	MAXIM	获取价格	Remote/Local Temperature Sensor with Dual Alarm Outputs and SMBus Serial Interface[MAX1619

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