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MIC2807-MMYML

更新时间： 2024-09-30 07:17:03

品牌	Logo	应用领域
麦瑞 - MICREL		开关
页数	文件大小	规格书
18页	432K
描述
RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise

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MIC2807-MMYML 数据手册

MIC2807

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 MIC2807 integrates a high performance 600mA

DC/DC converter 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 MIC2807 improves

efficiency in the handset without compromising quality.

• 2.7V to 5.5V input voltage range

• Stable with ceramic output capacitors

• Tiny 17-pin 2.5mm x 2.8mm MLF^®Package

• Thermal shutdown protection

• Current limit protection

RF PA Power Supply DC/DC Converter

• Adjustable output power supply – DAC controlled

The MIC2807 has a 2MHz, constant frequency pulse width

modulated (PWM) DC/DC converter 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 from 0.3V to 3.6V through a DAC input when

V_IN> V_OUT. The converter 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

converter 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.

–

V_OUT= V_DACx 3

• Bypass mode operation

–

Internal 95mꢀ switch between PVIN and OUT pins

V_DAC> 1.2V

• 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

The integrated dual low noise low dropout regulators are

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

The constant frequency DC/DC converter along with dual

low noise LDO regulators enables a very quiet and

efficient solution for mobile applications.

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 MIC2807 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 2.5mm x 2.8mm MLF^®package.

Applications

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

• CDMA2000 mobile phones

• UMTS/WCDMA mobile phones

• Wibro modules

• 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

M9999-022008-B

February 2008

12 3 4 5 6 7...18

中文翻译

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与MIC2807-MMYML相关器件

型号	品牌	获取价格	描述	数据表
MIC2807-MMYMLTR	MICREL	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17, 2.50 X 2.80 MM, GREEN, MLF-17
MIC2807-NNYML	MICREL	获取价格	RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise
MIC2807-NNYMLTR	MICROCHIP	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17, 2.50 X 2.80 MM, GREEN, MLF-17
MIC2807-NNYML-TR	MICROCHIP	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17
MIC2807-OOYML	MICREL	获取价格	RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise
MIC2807-OOYMLTR	MICROCHIP	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17, 2.50 X 2.80 MM, GREEN, MLF-17
MIC2807-OOYML-TR	MICROCHIP	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17
MIC280-7YM6	MICREL	获取价格	Precision IttyBitty Thermal Supervisor
MIC280-7YM6-TR	MICROCHIP	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO6
MIC2808	MICREL	获取价格	RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise

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