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MAX850 PDF预览

MAX850

更新时间: 2024-11-21 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI
页数 文件大小 规格书
8页 118K
描述
低噪声、稳压型、负输出电荷泵,用于GaAsFET偏置电源

MAX850 数据手册

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19-0238; Rev 2; 4/96  
Lo w -No is e , Re g u la t e d , Ne g a t ive  
Ch a rg e -P u m p P o w e r S u p p lie s fo r Ga As FET Bia s  
0–MAX853  
_______________Ge n e ra l De s c rip t io n  
The MAX850–MAX853 low-noise, inverting, charge-  
pump power supplies are ideal for biasing GaAsFETs in  
cellular telephone transmitter amplifiers.  
____________________________Fe a t u re s  
Fixed -4.1V or Adjustable -0.5V to -9V Output at 5mA  
4.5V to 10V Input Voltage Range  
2mVp-p Output Voltage Ripple (MAX850–MAX852)  
1mVp-p Output Voltage Ripple (MAX853)  
The MAX850–MAX852 offer both preset (-4.1V) and  
a d jus ta b le (-0.5V to -9.0V) outp ut volta g e s . The  
MAX853 uses an external positive control voltage to set  
the negative output voltage. Input voltage range for all  
four devices is 4.5V to 10V. Output current is 5mA.  
100kHz Charge-Pump Switching Frequency  
(MAX850/MAX851/MAX853)  
External Synchronizing Clock Input (MAX852)  
An internal linear regulator reduces the output voltage  
ripple to 2mVp-p. With a well-filtered control voltage  
Logic-Level Shutdown Mode: 1µA Max Over  
Temperature (MAX850/MAX852/MAX853)  
(V  
), the MAX853 achieves typical output ripple of  
CTRL  
Low Cost, 8-Pin SO Package  
less than 1mVp-p. Supply current is 3mA max, and  
shutdown current is less than 1µA max over temperature  
(5µA max for MAX851).  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
PIN-PACKAGE  
Dice*  
8 SO  
MAX850C/D  
MAX850ISA  
MAX850ESA  
MAX851C/D  
MAX851ISA  
MAX851ESA  
MAX852C/D  
MAX852ISA  
MAX852ESA  
MAX853C/D  
MAX853ISA  
MAX853ESA  
________________________Ap p lic a t io n s  
Cellular Phones  
-25°C to +85°C  
-40°C to +850°C  
0°C to +70°C  
8 SO  
Negative Regulated Power Supplies  
Personal Communicators, PDAs  
Wireless Data Loggers  
Dice*  
8 SO  
-25°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
8 SO  
Dice*  
8 SO  
Continuously Adjustable GaAsFET Bias  
LCD-Bias Contrast Control  
-25°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
8 SO  
Dice*  
8 SO  
8 SO  
-25°C to +85°C  
-40°C to +85°C  
__________Typ ic a l Op e ra t in g Circ u it  
°
* Dice are specified at T = +25 C only.  
A
V
IN  
= 4.5V to 10.0V  
(4 CELLS)  
C3  
__________________P in Co n fig u ra t io n  
IN  
C1+  
C1-  
V
= -4.1V  
OUT  
TOP VIEW  
C1  
C2  
(V of GaAsFET)  
GG  
MAX850  
MAX851  
MAX852  
OUT  
C4  
C1+  
C1-  
IN  
1
2
3
4
8
7
6
5
NEGOUT  
GND  
OUT  
MAX850  
MAX851  
MAX852  
MAX853  
NEGOUT  
SHDN*  
SHDN  
OSC  
FB  
FB**  
SHDN*  
(MAX850–852)  
(MAX850/853)  
GND  
SO  
* MAX850: SHDN  
MAX851: SHDN  
MAX852: OSC  
* SHDN (MAX851)  
OSC (MAX852)  
** CONT (MAX853)  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800  

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