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| 型号： | MAX881REUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC SUPPLY BIAS LN 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 充电泵，无线设备 |
| 输入电压： | 2.5 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | -2V，-2.5 V ~ 6.1 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
19-1372; Rev 2; 1/04
ATION
AILABL
EVALU E
AV
KIT
Low-Noise Bias Supply in μMAX
with Power-OK for GaAsFET PA
General Description
The MAX881R low-noise, inverting power supply is
designed for biasing GaAsFET power amplifiers in
portable wireless applications. This device is a charge-
? Small μMAX Package
Features
pump inverter followed by a negative linear regulator.
The input voltage range is 2.5V to 5.5V. The output is
preset at -2.0V or can be set, using two resistors, to any
voltage from -0.5V to (-V IN + 0.6V). It can deliver up to
4mA. The internal linear regulator also filters the output
to 1mVp-p ripple and noise.
Other features include a power-OK ( POK ) output that sig-
nals when the negative voltage is within 7.5% of its set
point. It protects the GaAsFET by not allowing power to
be applied to the GaAsFET’s drain until it is properly
biased. The signal can be routed either to a microcon-
troller or directly to a switch at the GaAsFET drain. The
MAX881R is available in a 10-pin μMAX package.
Applications
? 1mVp-p Output Voltage Ripple and Noise
? Power-OK Signal to Control GaAsFET Drain
Switch
? 0.05μA Logic-Controlled Shutdown
? 1ms Guaranteed Startup
? 2.5V to 5.5V Input
? -0.5V to (-V IN + 0.6V) Output at up to 4mA
? Operates with One 4.7μF and Three 0.22μF
Capacitors (no inductors needed)
Ordering Information
Cell Phones
PCS Phones
Wireless Modems
Two-Way Pagers
PART
MAX881REUB
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
10 μMAX
PHS Phones
Wireless Handsets
Mobile Radios
Wireless Computers
Typical Operating Circuit
OUTPUT
-2V (OR ADJ)
TOP VIEW
Pin Configuration
INPUT
2.5V TO 5.5V
IN
OUT
4mA, 1mVp-p
RIPPLE
C1+ 1
10 IN
MAX881R
C1-
2
9
N.C.
ON
OFF
SHDN
C1+
C1-
POK
CONTROLS
GaAsFET PA’s
DRAIN SWITCH
NEGOUT
POK
SHDN
3
4
5
MAX881R
8
7
6
GND
OUT
FB
NEGOUT
FB
GND
μ MAX
N.C. = NOT INTERNALLY CONNECTED
________________________________________________________________ Maxim Integrated Products
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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相关代理商/技术参数 |
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|---|---|
| MAX881REUB-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX881REUB-TG074 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX881REUB-TG075 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8821ETI+ | 功能描述:LED照明驱动器 White LED Charge Pump RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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