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參數(shù)資料
| 型號： | MAX881R |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Noise Bias Supply in レMAX with Power-OK for GaAsFET PA |
| 中文描述： | 低噪聲偏置電源、µMAX封裝，帶有電源就緒指示，用于GaAsFET PA |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 111K |
| 代理商： | MAX881R |
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
General Desc ription
The MAX881R low-noise, inverting power supply is
designed for biasing GaAsFET power amplifiers in
portable wireless applications. This device is a charge-
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 space-saving 10-pin μMAX
package.
Applic ations
Cell Phones
PCS Phones
PHS Phones
Wireless Handsets
Wireless Modems
Two-Way Pagers
Mobile Radios
Wireless Computers
Features
o
Small μMAX Package
o
1mVp-p Output Voltage Ripple and Noise
o
Power-OK Signal to Control GaAsFET Drain
Switch
o
0.05μA Logic-Controlled Shutdown
o
1ms Guaranteed Start-Up
o
2.5V to 5.5V Input
o
-0.5V to (-V
IN
+ 0.6V) Output at up to 4mA
o
Operates with One 4.7μF and Three 0.22μF
Capacitors (no inductors needed)
M
Low-Noise Bias S upply in μMAX
with Power-OK for GaAsFET PA
________________________________________________________________ Maxim Integrated Products
1
1
2
3
4
5
10
9
8
7
6
IN
N.C.
GND
OUT
POK
N.C. = NOT INTERNALLY CONNECTED
NEGOUT
C1-
C1+
MAX881R
μ
MAX
TOP VIEW
FB
SHDN
MAX881R
IN
OUT
POK
C1+
C1-
NEGOUT
FB
GND
SHDN
CONTROLS
GaAsFET PA’s
DRAIN SWITCH
OUTPUT
-2V (OR ADJ)
4mA, 1mVp-p
RIPPLE
INPUT
2.5V TO5.5V
ON
OFF
Typic al Operating Circ uit
19-1372; Rev 1; 6/98
PART
MAX881REUB
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
10 μMAX
EVALUATION KIT
AVAILABLE
Pin Configuration
Ordering Information
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX884CPA | 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators |
| MAX884 | 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators |
| MAX884MJA | 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators |
| MAX884CSA | Octal Transparent D-type Latches With 3-State Outputs 20-CFP -55 to 125 |
| MAX884EPA | Octal Transparent D-type Latches With 3-State Outputs 20-CDIP -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX881REUB | 功能描述:PMIC 解決方案 Bias Supply w/Power OK for GaAsFET PA RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX881REUB+ | 功能描述:PMIC 解決方案 Bias Supply w/Power OK for GaAsFET PA RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX881REUB+T | 功能描述:PMIC 解決方案 Bias Supply w/Power OK for GaAsFET PA RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX881REUB-T | 功能描述:PMIC 解決方案 Bias Supply w/Power OK for GaAsFET PA RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX881REUB-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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