Datasheet > 电源电路 > 开关式稳压器或控制器> MIC2808-NNYFT

MIC2808-NNYFT

更新时间： 2024-09-30 10:57:11

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器开关
页数	文件大小	规格书
18页	486K
描述
RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise 200mA/30mA LDO Regulators

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

MIC2808-NNYFT 数据手册

MIC2808

RF PA Power Management IC

2MHz, 600mA DC/DC w/DAC Input and

Bypass Switch, Dual Low Noise

200mA/30mA LDO Regulators

General Description

Features

The MIC2808 integrates a high performance 600mA

DC/DC step down regulator intended for powering a power

amplifier (PA) in a mobile phone with dual low noise low

dropout (LDO) regulators for the rest of the RF section.

Optimized for low noise performance, the MIC2808

improves efficiency in the handset without compromising

quality.

• 2.7V to 5.5V input voltage range

• Stable with ceramic output capacitors

• Tiny 16-pin 2.0mm x 2.5mm TMLF^®Package

• Thermal shutdown protection

• Current limit protection

RF PA Power Supply DC/DC Regulator

• Adjustable output power supply – DAC controlled

The MIC2808 has a 2MHz, constant frequency pulse width

modulated (PWM) DC/DC regulator designed for low noise

operation and high efficiency. The output voltage (V_OUT) is

variable from 0.3V to the input voltage (V_IN), adjustable

–

V_OUT= V_DACx 3

• Bypass mode operation

–

Internal 95mꢀ switch between PVIN and OUT pins

V_DAC> 1.2V

from 0.3V to 3.6V through a DAC input when V_IN> V_OUT

The regulator will work in a 100% duty cycle mode to offer

maximum power and efficiency in the application. In

addition to 100% duty cycle, the DC/DC regulator has a

bypass mode of operation where the input voltage node

(PVIN pin) is shorted to the output voltage node (OUT pin)

through a 95mΩ switch.

• Up to 600mA output current in PWM mode

• 100% duty cycle operation for maximum efficiency

• Tiny 4.7µH, 1µF output inductor and capacitor

• Low-noise 2MHz PWM operation

• >90% efficiency

Dual Low Noise Low Dropout Regulators

• High accuracy – ±2% over temperature

• High PSRR – greater than 70dB

• Very low output noise – 32µVrms

• LDO1 – 200mA output current capability

• LDO2 – 30mA output current capability

The integrated dual low noise low dropout regulators are

optimized for high PSRR capability and fast turn-on times.

The constant frequency DC/DC regulator along with dual

low noise LDO regulators enables a very quiet and

efficient solution for mobile applications.

The MIC2808 is a µCap design, operating with small

ceramic output capacitors and inductors for stability,

reducing required board space and component cost and it

is available in the tiny 2.0mm x 2.5mm TMLF^®package.

Applications

• CDMA2000 mobile phones

• UMTS/WCDMA mobile phones

• WiMAX/Wibro modules

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

• WiFi modules

• Power amplifier modules (PAMs) with linear PAs

Typical Application

DC/DC Output Voltage

vs. DAC Voltage

4.5

OUT

= 4.2V

= 100mA

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5

DAC VOLTAGE (V)

CDMA2000/WCDMA RF Power Supply Circuit

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-071709-A

July 2009

12 3 4 5 6 7...18

中文翻译

下载PDF

与MIC2808-NNYFT相关器件

型号	品牌	获取价格	描述	数据表
MIC2808-NNYFTTR	MICREL	获取价格	IC,MULTIPLE REGULATOR CIRCUIT,LLCC,16PIN,PLASTIC
MIC2808-NNYFT-TR	MICROCHIP	获取价格	Switching Regulator/Controller
MIC281	MICREL	获取价格	Low-Cost IttyBitty Thermal Sensor IttyBitty
MIC281	MICROCHIP	获取价格	The MIC281 is a digital thermal sensor capable of measuring the temperature of a remote PN
MIC281_11	MICREL	获取价格	Low-Cost IttyBitty? Thermal Sensor IttyBitty
MIC2810	MICREL	获取价格	Digital Power Management IC 2MHz, 600mA DC/DC w/Dual 300mA/300mA Low VIN LDOs
MIC2810	MICROCHIP	获取价格	The MIC2810 is a high performance power management IC, integrating a 2MHz DC/DC switcher w
MIC2810_08	MICREL	获取价格	Digital Power Management IC 2MHz, 600mA DC/DC w/Dual 300mA/300mA Low VIN LDOs
MIC2810-1.2/1.2/2.8YML	MICROCHIP	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC16
MIC2810-1.2/1.8/3.3YML	MICROCHIP	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC16

与MIC2808-NNYFT相关文章

塔塔电子与力积电达成技术转让协议，携手建设印度首座晶圆厂
2024-09-29

31
英特尔震撼发布：128核心256线程的至强6性能核处理器
2024-09-29

27
SK海力士量产12层HBM3E，容量高达36GB
2024-09-27

26
意法半导体传感器驱动Sphere，开启沉浸式电影新时代
2024-09-27

37

产品中心

服务支持

精选活动

关于我们

帮助中心

MIC2808-NNYFT

MIC2808-NNYFT 数据手册

与MIC2808-NNYFT相关器件

与MIC2808-NNYFT相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

MIC2808-NNYFT

MIC2808-NNYFT 数据手册

与MIC2808-NNYFT相关器件

与MIC2808-NNYFT相关文章

您还可以找

您在本页遇到什么问题？