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參數(shù)資料
| 型號(hào)： | MIC2807 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | RF PA Power Management IC 2MHz, 600mA DC/DC w/DAC Input and Bypass Switch, Dual Low Noise 200mA/30mA LDO Regulators |
| 中文描述： | 射頻功率放大器電源管理IC，600mA的直流/直流瓦特2MHz的/ DAC輸入和旁路開(kāi)關(guān)，雙低噪聲200mA/30mA LDO穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 1/17頁(yè) |
| 文件大?。?/td> | 442K |
| 代理商： | MIC2807 |
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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
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.
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 95m
switch.
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.
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.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
MLF and
Micro
LeadFrame 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
January 2007
1
M9999-013007-A
Features
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
–
V
OUT
= V
DAC
x 3
Bypass mode operation
–
Internal 95m
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
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
Applications
CDMA2000 mobile phones
UMTS/WCDMA mobile phones
Wibro modules
WiFi modules
Power amplifier modules (PAMs) with linear PAs
Typical Application
CDMA2000/WCDMA RF Power Supply Circuit
0
DAC VOLTAGE (V)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
DC/DC Output Voltage
vs. DAC Voltage
I
OUT
= 100mA
V
IN
= 4.2V
B
V
OUT
=V
DAC
x3
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| MIC280-7BM6 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| MIC280-7BM6TS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC2807-JJYML TR | 功能描述:PMIC 解決方案 PAM Power Management IC: DAC controlled DC-DC + 2 LDOs RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MIC2807-MMYML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
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