Datasheet > MIC2807

MIC2807

更新时间： 2024-10-01 14:53:31

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
18页	431K
描述
The MIC2807 integrates a high performance DC/DC converter intended for powering a power amplifier

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MIC2807 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

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与MIC2807相关器件

型号	品牌	获取价格	描述	数据表
MIC2807_08	MICREL	获取价格	RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise
MIC2807-2.8/2.8YML	MICROCHIP	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17
MIC2807-2.85/2.85YML	MICROCHIP	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17
MIC280-7BM6	MICREL	获取价格	Precision IttyBitty Thermal Supervisor
MIC2807-JJYML	MICREL	获取价格	RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise
MIC2807-JJYMLTR	MICROCHIP	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17, 2.50 X 2.80 MM, GREEN, MLF-17
MIC2807-JJYML-TR	MICROCHIP	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC17
MIC2807-MMYML	MICREL	获取价格	RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise
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

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